Electromagnetic seal secure door set

Abstract

An electromagnetic (EM) door seal comprising: two cooperating members, a male cooperating member having two or more fins and a female cooperating member having two or more channels, each channel of the two or more channels dimensioned to receive respective fins of the two or more fins, each channel of the two or more channels having a resiliently deformable contact bumper disposed on each side which are deformed upon contact by a respective fin of the two or more fins.

Description

ELECTROMAGNETIC SEAL SECURE DOOR SETFIELD OF THE INVENTION

[0001] This invention relates to an electromagnetic (EM) door seal, a secure door set, a secure door leaf and a secure door frame all comprising an EM seal having two cooperating members, a male cooperating member having two or more fins and a female cooperating member having two or more channels. More particularly, this invention relates to an EM seal having the cooperating male member and female member and one or more bias to selectively impel one of the cooperating members to allow opening and closing of the door leaf.BACKGROUND TO THE INVENTION

[0002] Modem states rely heavily on electronic and electrical equipment for communication, commerce, and national security. This crucial equipment needs to be protected from significant threats that could damage its operability or functionality and cause major damage to networks and catastrophic disruptions to services. Undesired EM radiation presents a serious threat which may originate naturally from lightning, solar storms & solar flares or from man-made sources including power lines and electromagnetic pulses (EMP), also referred to as a transient electromagnetic disturbance (TED). In addition to the physical protection of electronic equipment, there is a need to protect sensitive data and information stored and transmitted by this equipment.

[0003] Electromagnetic (EM) shielding has been used to protect highly sensitive computers by preventing radiofrequency (RF) and EM waves from entering a sealed enclosure containing the computer equipment. Later technologies were designed to prevent EM or RF waves from being transmitted from the shielded enclosure to the outside, in order to maintain confidentiality. More recently, EM shielding has been applied to prevent loss of function or data resulting from an EMP, which could be natural, such as, caused by lightning or a solar storm, or artificial, such as deliberate discharge of a weapon intended to disrupt communications equipment or computers.

[0004] From small scale printed circuit board (PCB) to large rooms, devices and equipment are commonly protected from electromagnetic threats by surrounding the areaof interest with EM shielding to block or attenuate electromagnetic waves by reflection, absorption, or dissipation. These enclosures are commonly referred to as a Faraday Cage or Faraday Shield. The shield may be formed of a continuous covering of conductive material or a cage consisting of a mesh in such materials.

[0005] EM shielding is most effective when it is an uninterrupted barrier which fully encloses the space requiring protection. However, for enclosures to be functional and allow persons to work inside, penetrations are required for the transit of amenities such as air, water, power, and communications. These penetrations create unavoidable apertures in the enclosure which can degrade the overall shielding effectiveness (SE).

[0006] Generally, the largest penetration in any working enclosure is the doorway to allow the ingress and egress of personnel. Like all penetrations, doors may require EM shielding to compliment the overall shielding effectiveness of an enclosure.

[0007] Some Radio Frequency (RF) shielded doors utilise a mechanical contact mechanism. For example, US Patent 3,589,070 describes a door with a vertical rigid plate member which enters a slot on the frame, forcing contact fingers on either side of the slot apart, so the front of the plate member contacts a foam plastic seal. US Patent 4,069,618 similar describes a blade-like rigid contact element on a door which, when the door is closed, is received in a slot on the frame. Finger contacts are placed on either side of the slot in the frame to make electrical contact with the contact element on the door.

[0008] Another example of a mechanical contact mechanism is described in Japanese patent publication 2012-169604 to Mitsubishi Electric Corporation, which discloses a door and frame with complementarily positioned metal plates, elastic conductive members and EM wave absorption members, which come into contact when the door is closed against the frame.

[0009] Chinese Utility Model 205823097 to Zhuhou Heli Electromagnetic Tech Co Ltd describes a door and frame which when closed, has a sealing strip on the door contact the door frame to form a good seal for sound insulation. The sealing strip is provided on one end of an aluminium bead extending from an edge of the door leaf. The aluminium bead isconnected to a bending member, an electromagnetic shielding layer and / or a radiation protection layer to provide radiation protection and electromagnetic shielding in an integral shielding structure.

[0010] Chinese Utility Model 206829916 also to Zhuhou Heli Electromagnetic Tech Co Ltd describes an aluminium alloy door and frame that has a copper foil EM shielding layer and a metal reed arranged on the four sides of the door leaf so that, when the door is closed, the metal reed is pressed and connected with the door frame to cut off the gap between the leaf and frame and improve the EM shielding.

[0011] United States Patent 8,925,251 to Rust describes an EM shielded door with a constant force spring perimeter seal. The door panel is provided with a sealing surface along one side near the outer edge. On the doorjamb there is a spring containment member along an insider perimeter facing the door panel. The spring containment member is in the form of one or more coiled spring which coils and uncoils with the closing and opening of the door.

[0012] Canadian Patent 1254988 to Merewether describes a door seal with two cooperating members, at least one of which has a cavity therein filled with a dielectric or lossy material. The door is described as having a knife edge which, when the door is closed, is received in a slot on the door frame. Resilient spring fingers are disposed on either side of the slot to contact the knife edge on the door. The spring fingers are described as being constructed out of beryllium copper or phosphor bronze or other similar material.

[0013] With the exponential use and reliance on electronics and electrical equipment, the need for enclosures to provide shielding from damaging EM is growing. Improving the SE of unavoidable apertures, and particular doorways, will enhance the over shielding efficacy of any enclosure.

[0014] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement or any form of suggestion that the prior art forms part of the common general knowledge.SUMMARY OF THE INVENTION

[0015] Generally, embodiments of the invention relate to an EM door seal. Particular embodiments relate to an electromagnetic (EM) door seal, a secure door set, a secure door leaf and a secure door frame all comprising an EM seal having two cooperating members. In one embodiment the two cooperating members are in the form of a male cooperating member having two or more fins and a female cooperating member having two or more channels. In another embodiment the two cooperating members are in the form of an attack side cooperating member and a secure side cooperating member. Another particular embodiment relates to an EM seal having the cooperating male member and female member and one or more bias to selectively impel one of the cooperating members to allow opening and closing of the door leaf.

[0016] Advantageously, the EM seal attenuates EM radiation from entering or exiting the enclosure through the doorway. The EM seal and door set of the invention is of particular advantage as it is able to incorporate security features which adds to the utility of the invention.

[0017] In a first aspect, although it need not be the only or indeed the broadest form, the invention resides in an EM door seal comprising: two cooperating members, a male cooperating member having two or more fins and a female cooperating member having two or more channels, each channel of the two or more channels dimensioned to receive respective fins of the two or more fins, each channel of the two or more channels having a resiliently deformable contact bumper disposed on each side which are deformed upon contact by a respective fin of the two or more fins.

[0018] In a second aspect the invention resides in a secure door leaf comprising: a secure door leaf adapted to open and close within a secure door frame, the secure door leaf comprising an EM seal having two cooperating members, a male cooperating member having two or more fins and a female cooperating member having two or more channels, each channel of the two or more channels dimensioned to receive respective fins of the two or more fins, each channel of the two or more channels having a resiliently deformable contact bumper disposed on each side which are deformed upon contact by a respective fin of the two or more fins, wherein one of the male cooperating member orfemale cooperating member is disposed on the secure door leaf and the other of the male cooperating member or female cooperating member is disposed on the secure door frame.

[0019] According to one embodiment of the second aspect, when the one of the male cooperating member or female cooperating member is disposed on the door leaf it is disposed on a secure side of an attack side door leaf or an attack side of a secure side door leaf.

[0020] The secure door leaf may comprise an attack side sheet and a secure side sheet. The attack side sheet and secure side sheet may be joined together with a top plate, a bottom plate and opposing side plates disposed on each long edge of the secure door leaf. The secure door leaf may further comprise a series of fixing plates extending laterally across the door, spaced apart from top to bottom of the secure door leaf. The top plate, opposing side plates, bottom plate and fixing plates may be comprised of aluminium.

[0021] In a third aspect the invention resides in a secure door frame, the secure door frame comprising: a secure door frame body adapted to receive at least one secure door leaf, the secure door frame comprising an EM seal having two cooperating members, a male cooperating member having two or more fins and a female cooperating member having two or more channels, each channel of the two or more channels dimensioned to receive respective fins of the two or more fins, each channel of the two or more channels having a resiliently deformable contact bumper disposed on each side which are deformed upon contact by a respective fin of the two or more fins, wherein one of the male cooperating member or female cooperating member is disposed on the secure door frame and the other of the male cooperating member or female cooperating member is disposed on the secure door leaf.

[0022] According to one embodiment of the third aspect, the one of the male cooperating member or female cooperating member disposed on the secure door frame is disposed on an attack side rebate section or a secure side rebate section.

[0023] The secure door frame may comprise an attack side and a secure side. The secure door frame may comprise a secure door frame body comprising a profile. The secure doorframe body may comprise a main section, an attack side rebate section and a secure side rebate section. The attack side rebate section may receive an attack side door leaf. The secure side rebate section may receive a secure side door leaf.

[0024] The secure door frame may be comprised of aluminium. The secure door frame may comprise a threshold plate. The threshold plate may comprise 5mm aluminium.

[0025] In a fourth aspect the invention resides in a secure door set comprising a secure door frame of the third aspect and at least one secure door leaf of the second aspect.

[0026] In one particular embodiment of the fourth aspect, the secure door set comprises a door frame of the third aspect; an attack side door leaf of the second aspect on an attack side of the door frame and a secure side door leaf of the second aspect on a secure side of the door frame.

[0027] In a fifth aspect, the invention resides in an EM door seal for a double door, the EM door seal comprising: two cooperating members, an attack side cooperating member and a secure side cooperating member, the attack side cooperating member and the secure side cooperating member connected by a rod, the attack side cooperating member adapted to be impacted by an attack side door leaf closing and the secure side cooperating member adapted to move from a non-abutting position to an abutting position against a secure side door leaf, when the secure side door leaf is in a closed position.

[0028] According to the fifth aspect, the impact of the attack side door leaf closing on the attack side cooperating member may move the attack side cooperating member in a direction spanning a gap between the attack side door leaf and the secure side door leaf. The movement of the secure side cooperating member may be in the direction spanning the gap. The movement of the attack side cooperating member and the secure side cooperating member may be concomitant. The movement of the attack side cooperating member and the secure side cooperating member may be from a non-shielding position to a shielding position.

[0029] The EM door seal of the fifth aspect may have a frame adapted to be disposed between an attack side door leaf and a secure side door leaf of the double door.

[0030] The frame of the fifth aspect may be comprised of a metal, or other suitable material. The frame may be disposed in a gap between the attack side door leaf and the secure side door leaf. The two cooperating members of the fifth aspect may traverse the frame.

[0031] The seal of the fifth aspect may be made of copper, brass, aluminium, steel, or other RF shielding metal or RF shielding compound.

[0032] The seal of the fifth aspect may have an additional conductive cover made of one or more of: metal fingers, conductive gaskets, soft foam covered in conductive metal mesh, or another conductive material. The additional conductive cover may comprise the EM door seal of the first aspect.

[0033] According to the fifth aspect the attack side cooperating member may be a block shape or other suitable shape. The block may be a quadrilateral shape.

[0034] According to the fifth aspect the secure side cooperating member may be a block shape or T-shape. The T-shape may adapted to be disposed so a crossbar of the T-shape abuts the secure side door leaf in the shielding position.

[0035] The rod of the fifth aspect may comprise a screw such as, an M5 screw. The rod of the fifth aspect may be any suitable elongate member.

[0036] According to the fifth aspect, the attack side cooperating member, the secure side cooperating member and the rod may be separate integers. In another arrangement, the attack side cooperating member, the secure side cooperating member and the rod may be integral.

[0037] The EM door seal of the fifth aspect may further comprise a compression spring. The compression spring may be disposed on one or more of the rod, the attack side cooperating member and the secure side cooperating member. In one arrangement, thecompression spring is disposed on the attack side cooperating member and the rod. The compression spring may provide a controlled lateral movement of the two cooperating members. The compression spring may bias the two cooperating members to the nonshielding position. The compression spring may be one or more: a metal spring, a leaf spring or another compression mechanism.

[0038] According to the fifth aspect, the attack side door leaf may have an attack side door leaf cutout to accommodate the seal of the fifth aspect. The secure side door leaf may have a secure side door leaf cutout to accommodate the seal of the fifth aspect. A secure side surface of the attack side door leaf impacts on the attack side cooperating member. The secure side cooperating member is moved into an abutting position against an attack side surface of the secure side door leaf.

[0039] The EM door seal according to any one of the above aspects may comprise a left upright section, a right upright section, a head section and a bottom section. Each of the left upright section, right upright section, head section and bottom section may have the two cooperating members along a respective length. According to the fifth aspect a plurality of rods may be disposed at regular intervals along a perimeter of a passageway.

[0040] The EM door seal according to the fifth aspect may have the bottom section adapted to be positioned below floor level. The positioning of the bottom seal may allow a level bottom door threshold. The level bottom door threshold may allow a wheelchair to traverse a passage defined by the secure door frame. The level bottom door threshold may comprise a door threshold member positioned above the bottom section of the EM door seal. When the door threshold member is positioned above the bottom section of the EM door seal, any attack side cooperating member located below the door threshold member may not be impacted by an attack side door leaf closing. The attack side cooperation member portion below the threshold member may be in bottom part of a left upright section 4002, a bottom part of a right upright section 4004 or in a bottom section 4008. When the door threshold member is positioned above the bottom section of the EM door seal, the secure side cooperating member may move from a non-abutting position to an abutting position against a secure side door leaf, when the secure side door leaf is in aclosed position, across an entire circumference of the door seal as driven by the impact above the door threshold member.

[0041] In a sixth aspect the invention resides in a secure door frame, the secure door frame comprising: a secure door frame body adapted to receive an attack side door leaf and a secure side door leaf, the secure door frame comprising an EM door seal for a double door having two cooperating members, an attack side cooperating member and a secure side cooperating member, the attack side cooperating member and the secure side cooperating member connected by a rod, the attack side cooperating member adapted to be impacted by the attack side door leaf closing and the secure side cooperating member adapted to move from a non-abutting position to an abutting position against the secure side door leaf, when the secure side door leaf is in a closed position.

[0042] The secure door frame of the sixth aspect may comprise an attack side and a secure side. The secure door frame may comprise a secure door frame body comprising a profde. The secure door frame body may comprise a main section.

[0043] In a seventh aspect the invention resides in a secure door set comprising a secure door frame of the sixth aspect, an attack side door leaf and a secure side door leaf. The double door may comprise two hinge door leaves; one hinge door leaf and one sliding door leaf or two sliding door leaves. The attack side door leaf may comprise a hinge door leaf and the secure side door leaf may comprise a sliding door leaf.

[0044] According to any one of the first to fourth aspects, each bumper may be comprised of an EM shielding material. The EM shielding material may be selected from copper, bronze, aluminium, gold and brass. In one particular embodiment each bumper is comprised of beryllium copper.

[0045] In one embodiment of any one of the first to fourth aspects, the deformation of the bumper comprises a compression.

[0046] In another embodiment of any one of the first to fourth aspects, the one or more fins are disposed to be side by side along a side of a door set and top to bottom along a top and bottom of a door set.

[0047] In yet another embodiment of any one of the first to fourth aspects, the one or more channels are disposed to be side by side along a side of a door set and top to bottom along a top and bottom of a door set.

[0048] In still another embodiment of any one of the first to fourth aspects, the male cooperating member and the female cooperating member extend along the complete perimeter of a passage of the door set.

[0049] In a particular embodiment of any one of the first to fourth aspects, one or more bias selectively impels one of the cooperating members to allow opening and closing of the door leaf. The one or more bias may impel one of the cooperating members in a transverse direction to the respective fins being received in the channels. Each of the one or more bias may comprise a spring such as, a coil spring. The one or more bias may only be disposed along a length of a door set. A hinge side of the door set may comprise an extension bias and a lock side of the door set may comprise a compression bias or a hinge side of the door set may comprise a compression bias and a lock side of the door set may comprise an extension bias. The one or more bias may act on a seal containment member. The top and bottom of the door set may be free of any bias. One or more bias may be disposed at regular intervals along a length of door frame. One or more bias may be disposed every 50; 100; 150 or 200 mm.

[0050] According to any one of the first to fourth aspects, one of the one or more cooperating members may be housed in a seal containment member. In one embodiment, the female cooperating member is housed in the seal containment member. In another embodiment, the male cooperating member is housed in the seal containment member. The seal containment member may comprise a member body having a base and a flange either side of the base. The flange either side of the base may extend beyond the base. The two or more channels may be disposed between the flanges.

[0051] In another embodiment of any one of the first to fourth aspects, the seal containment member may be disposed in a mounting box dimensioned to allow travel of the seal containment member as impelled by the one or more bias. The mounting box may comprise a mounting box body having void walls defining a void and rebate walls defining a rebate channel. The rebate channel may be wider than the void to allow travel of the flanges. The void may allow travel of the base.

[0052] In yet another embodiment of any one of the first to fourth aspects, the EM door seal comprises a mounting plate. The mounting plate may comprise a mounting plate body dimensioned to receive the mounting box.

[0053] In still another embodiment of any one of the first to fourth aspects, the EM door seal comprises a cover block to at least partially cover the mounting box and seal containment member. The cover block does not cover the two or more channels.

[0054] According to any one of the first to fourth aspects, the cooperating members may be made of one or more material selected from: copper; bronze; aluminium; gold and brass or another suitable metal or compound. In a particular embodiment the male cooperating member and the female cooperating member are made of brass.

[0055] The door leaf and door frame according to any one of the above aspects may be made of aluminium or brass or another suitable conductive metal or composite material. The leaf and door frame may be coated with a metal or a composite material.

[0056] Further aspects of the present invention will also be described in the detailed description of the invention below.

[0057] A detailed description of one or more embodiments of the invention is provided below, along with accompanying figures that illustrate by way of example the principles of the invention. While the invention is described in connection with such embodiments, it should be understood that the invention is not limited to any one or combination of embodiments. On the contrary, the scope of the invention is limited only by the appended claims and the invention encompasses numerous alternatives, modifications and equivalents.

[0058] For the purpose of example, numerous specific details are set forth in the following description in order to provide a thorough understanding of the present invention. The present invention may be practised according to the claims without some or all of these specific details. For the purposes of clarity, technical material that is known in the technical fields related to the invention has not been described in detail so that the present invention is not unnecessarily obscured.BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order that the invention may be readily understood and put into practical effect, reference will now be made to embodiments of the present invention with reference to the accompanying drawings, wherein like reference numbers refer to identical elements. The drawings are provided by way of example only, wherein:

[0060] Figure 1 is an isometric view of an attack side of one embodiment of a secure door set comprising a secure door frame and an attack side secure door leaf and a secure side secure door leaf according to the invention.

[0061] Figure 2A is an isometric view of an attack side of the secure door leaf shown in Figure 1.

[0062] Figure 2B is an isometric view of a secure side of the secure door leaf shown in Figure 1.

[0063] Figure 2C is an isometric exploded view of the secure door leaf shown in Figure 1.

[0064] Figure 3A is an isometric view of an attack side of the secure door frame shown in Figure 1.

[0065] Figure 3B is an isometric exploded view of the secure door frame shown in Figure 1.

[0066] Figure 4A is a section view of one embodiment of a door seal according to the invention.

[0067] Figure 4B is a section view of a door seal according to the invention showing a lock side of the secure door set.

[0068] Figure 4C is a section view of one embodiment of a door seal according to the invention showing a hinge side of the secure door set.

[0069] Figure 4D is a section view of one embodiment of a door seal according to the invention showing a top (or bottom) side of the secure door set.

[0070] Figure 4E is a schematic diagram showing an isometric view of a door seal according to one embodiment of the invention.

[0071] Figure 4F is a cross-sectional isometric view showing one embodiment of a door fitted with a seal according to the invention.

[0072] Figure 4G is a close up view of the seal from the region labelled CJ in Figure 4F.

[0073] Figure 5A is an isometric view of an attack side of a door set according to another embodiment of the invention comprising a secure door frame and an attack side secure pivoting door leaf and a secure side secure sliding door leaf according to the invention.

[0074] Figure 5B is a front view of an attack side of the door set shown in Figure 5A.

[0075] Figure 5C is a section view of the door set shown in Figure 5 A taken along the section A-A shown in Figure 5B with a bottom region encircled and identified with “B”.

[0076] Figure 5D is also a section view of the door set shown in Figure 5A taken along the section A-A shown in Figure 5B with a top region encircled and identified with “E”.

[0077] Figure 5E is a magnified view of the region “B” encircled in Figure 5C.

[0078] Figure 5F is a magnified view of the region “E” encircled in Figure 5D.

[0079] Skilled addressees will appreciate that elements in the drawings are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the relative dimensions of some elements in the drawings may be distorted to help improve understanding of embodiments of the present invention.TABLE OF PARTSDETAILED DESCIPTION OF THE INVENTION

[0080] The present invention relates to an EM door seal, a secure door set, a secure door leaf and a secure door frame all comprising an EM seal having two cooperating members. As will be explained below the two cooperating members are a male cooperating member having two or more fins and a female cooperating member having two or more channels.

[0081] Commercial, government and residential buildings utilise secure access doors which are constructed with features that provide extra strength to resist physical breach, ram-raiding and projectiles, such as bullets. Secure access doors may also be constructed to resist being dismantled. Some also include fire-resistant features and electromagnetic shielding.

[0082] Existing solutions for providing adequate shielding to doorsets tend to treat them in isolation. The combing of the shielding and security features of the doorset of the present invention provides an enhanced level of adaptability for new enclosures and the security upgrading of existing enclosures.

[0083] For purposes of description herein, the terms “upper,” “lower,” “right,” “left,” “rear,” “front,” “vertical,” “horizontal,” “interior,” “exterior,” and derivatives thereof shallrelate to the invention as oriented in Figure 1, which shows a safe side or front side of the electromagnetic secure door set 1000, or where appropriate Figure 5 A which shows an attack side of a secure door set 3000. However, it is to be understood that the invention may assume various alternative orientations, except where expressly specified to the contrary. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise. Additionally, unless otherwise specified, it is to be understood that discussion of a particular feature or component extending in or along a given direction or the like does not mean that the feature or component follows a straight line or axis in such a direction or that it only extends in such direction or on such a plane without other directional components or deviations, unless otherwise specified.

[0084] Figure 1 shows one embodiment of a secure door set 1000 according to the invention. Secure door set 1000 comprises a door frame 1200 which receives a door leaf 1600 on an attack side 1202 and another door leaf 1600 on a secure side 1204.

[0085] While the major components of EM door seal 2000, being the cooperating members 2100, 2200, in the form of male cooperating member 2100 and female cooperating member 2200 can be seen in Figure 1, Figures 4A, 4B, 4C, 4D and 4E show more detailed views showing how the inter-fitting.

[0086] In Figure 4A the two cooperating members 2100, 2200, in the form of male cooperating member 2100 having two or more fins 2102 and female cooperating member 2200 having two or more channels 2202 can be seen. Each channel 2202 is dimensioned to receive respective fins 2102 and has a resiliently deformable contact bumper 2204 disposed on each side. The bumpers 2204 are deformed upon contact by a respective fin 2102 which results in the bumpers 2204 being compressed.

[0087] Figures 2A, 2B and 2C show one embodiment of a secure door leaf 1600 adapted to open and close within secure door frame 1200 and comprising EM seal 2000. As shownwith respect to Figures 2A, 2B and 2C and Figure 3A one of the male cooperating member 2100 or female cooperating member 2200 is disposed on the secure door leaf 1600 and the other of the male cooperating member 2100 or female cooperating member 2200 is disposed on the secure door frame 1200. In the illustrated embodiment, the male cooperating member 2100 is attached to the door leaf and the female cooperating member 2200 is attached to the door frame.

[0088] In the embodiment shown in Figures 2A, 2B and 2C, the one of the male cooperating member 2100 or female cooperating member 2200 disposed on door leaf 1600 is disposed on a secure side 1604 of an attack side door leaf 1600 or an attack 1602 side of a secure side door leaf 1600.

[0089] As shown in Figure 2C, secure door leaf 1600 comprises an attack side sheet 1610 and a secure side sheet 1612. The attack side sheet 1610 and secure side sheet 1612 may be joined together with a top plate 1614, a bottom plate 1616 and opposing side plates 1618 disposed on each long edge of the secure door leaf 1600. The secure door leaf 1600 is also shown to comprise a series of fixing plates 1620 extending laterally across the secure door leaf 1600, spaced apart from top to bottom of the secure door leaf 1600. The top plate 1614, opposing side plates 1618, bottom plate 1616 and fixing plates 1620 may be comprised of aluminium.

[0090] The secure door frame 1200 shown in Figure 3 A is illustrated to comprise a secure door frame body 1210 adapted to receive at least one secure door leaf 1600. The secure door frame 1200 comprises an EM seal 2000. One of the male cooperating member 2100 or female cooperating member 2200 is disposed on the secure door frame 1200 and the other of the male cooperating member 2100 or female cooperating member 2200 is disposed on the secure door leaf 1600. The secure door frame defines a passageway 1240.

[0091] As shown in Figure 1, secure door frame 1200 has an attack side 1202 and a secure side 1204. The secure door frame 1200 is illustrated in Figure 1 to comprise a secure door frame body 1210 comprising a profile 1212. The secure door frame body 1210 has a main section 1216, an attack side rebate section 1214 and a secure side rebate section 1218. Theattack side rebate section 1214 is illustrated in Figure 1 to receive an attack side door leaf 1600 and the secure side rebate section 1218 may receive a secure side door leaf.

[0092] The one of the male cooperating member 2100 or female cooperating member 2200 disposed on the secure door frame 1200 may be disposed on an attack side rebate section 1214 or a secure side rebate section 1218.

[0093] As best seen in figure 3B, the two top female cooperating members and the two side female cooperating members are joined at their ends to form a frame (labelled C.2 in figure 3B). As will be later described, this entire frame is fitted into the door frame in a way to allow the frame to move transversely from side to side across the width of the door frame. This is done to accommodate the pivotal movement of the action of closing the door. As the door is progressively closed, the fins of the male formations at the hinge side of the door commence entering their corresponding female formations. As the door then continues to move to its fully closed position, and the seals interengage around all aides of the door, there is small degree of movement of the frame C.2 towards the lock side of the door. This movement is allowed by a free floating mounting arrangement of the frame C.2 under the influence of biasing springs, which bias the frame towards a set position at the hinge side of the frame. In this position, the male formations first enter the female formations during door closing, and the frame is then moved against the biasing springs by further closing of the door to arrive at its fully closed position. The freedom of movement of the frame allows for smooth interengagement of the seals during door closing without collision and with minimised wear on the seals.

[0094] The secure door frame 1200 may be comprised of aluminium. The secure door frame 1200 may comprise a threshold plate which can be made of 5mm aluminium.

[0095] Contact between the cooperating members 2100, 2200 is enhanced by the inclusion of bumpers 2204 within the channels 2202 of the female cooperating member 2200. The horizonal lengths are fixed in position as there is no movement in the horizontal plane between the horizontal lengths of the cooperating members 2100, 2200 when the secure door leaf 1600 is opened and closed.

[0096] While bumpers 2204 are comprised of beryllium copper, from the teaching herein a skilled person is readily able to select other suitable material such as other EM shielding materials for example, copper, bronze, aluminium, gold and brass..

[0097] As shown in Figures 4A, 4B and 4C the one or more fins 2102 are disposed to be side by side along a side of a door set 1000. However the one or more fins 2102 are disposed top to bottom along a top and bottom of a door set 1000.

[0098] Similarly, the one or more channels 2202 are disposed to be side by side along a side of a door set 1000 and top to bottom along a top and bottom of a door set 1000.

[0099] As is apparent from Figure 1, the male cooperating member 2100 and the female cooperating member 2200 extend along the complete perimeter of the door set 1000.

[0100] As shown in Figures 4A, 4B and 4C, one or more bias 2700 selectively impels one of the cooperating members 2100, 2200 to allow opening and closing of door leaf 1600. In the embodiment shown, bias 2700 is in the form of a coil spring. Based on the teaching herein a skilled person is readily able to select another suitable bias.

[0101] The one or more bias 2700 is only disposed along a length of a door frame 1200. The hinge side of door frame 1200 comprises an extension bias and the lock side of the door frame 1200 comprises a compression bias or a hinge side of the door frame 1200 may comprise a compression bias and a lock side of the door frame 1200 may comprise an extension bias. The one or more bias 2700 acts on a seal containment member 2500. The top and bottom of the door set 1000 is free of any bias.

[0102] As illustrated in Figure 4A the one or more bias impels the female cooperating member 2200 in a transverse direction to the respective fins 2102 being received in the channels 2202.

[0103] Although not shown in the Figures one or more bias 2700 may be disposed at regular intervals along a length of door frame 1200. For example, a bias 2700 may be disposed every 50; 100; 150 or 200 mm.

[0104] The ability of the vertical lengths to move from side to side allows for the smooth nesting of the door leaf seal fins 2102 within the contact seal channels 2202 when the door leaf 1600 is opened and closed.

[0105] As shown in Figure 4A one of the one or more cooperating members 2100, 2200 is housed in a seal containment member 2500. While Figure 4A shows female cooperating member 2200 to be housed in seal containment member 2500, in other embodiments the male cooperating member 2100 is housed in seal containment member 2500. The seal containment member 2500 comprises a member body 2502 having a base 2504 and a flange 2506 either side of the base 2504 which extend beyond base 2504. The two or more channels 2404 are disposed between the flanges 2506.

[0106] Seal containment member 2500 is disposed in a mounting box 2400 dimensioned to allow travel of the containment member 2500 as impelled by the one or more bias 2700. Mounting box 2400 comprises a mounting box body 2402 having void walls 2406 defining a void 2404 and rebate walls 2410 defining a rebate channel 2408. The rebate channel 2408 is wider than void 2404 to allow travel of flanges 2506. Void 2404 only allows travel of base 2504.

[0107] EM door seal 2000 also comprises a mounting plate 2300 which comprises a mounting plate body 2302 dimensioned to receive mounting box 2400.

[0108] EM door seal 2000 further comprises cover block 2600 which at least partially covers mounting box 2400 and seal containment member 2500, without covering the two or more channels 2202.

[0109] In the embodiment shown in Figures 4A, cooperating members 2100, 2200 are made of brass. From the teaching herein, a skilled person is readily able to select another suitable material such as, copper, aluminium or bronze, gold or another suitable metal or compound.

[0110] The door leaf and door frame may be made of aluminium or brass or another suitable conductive metal or composite material. The leaf and door frame may be coated with a metal or a composite material.

[0111] Figures 5A to 5F show another embodiment of a secure door set 3000 according to the invention. Secure door set 3000 is illustrated to have a door frame 3200 which receives a secure side door leaf 3600 on an attack side 3202 and secure sided door leaf 3600 on a secure side 3204 to control access through passageway 3240 (not labelled).

[0112] Figures 5A to 5F illustrate an EM door seal 4000 for a double door having two cooperating members, an attack side cooperating member 4100 and a secure side cooperating member 4200, which are connected by a rod 3850. As is apparent from Figures 5E to 5F, the attack side cooperating member 4100 is adapted to be impacted by an attack side door leaf 3600 closing and the secure side cooperating member 4200 is adapted to move from a non-abutting position to an abutting position against a secure side door leaf 3800 when the secure side door leaf 3800 is in a closed position.

[0113] The impact of the attack side door leaf 3600 closing on the attack side cooperating member 4100 moves the attack side cooperating member 4100 in a direction spanning a gap 3700 between the attack side door leaf 4100 and the secure side door leaf 4200. The movement of the secure side cooperating member 4200 is in the direction spanning gap 3700. The movement of attack side cooperating member 4100 and secure side cooperating member 4100 is concomitant, by virtue of their disposition on rod 3850. The movement of the attack side cooperating member 4100 and the secure side cooperating member 4200 is from a non-shielding position to a shielding position.

[0114] The EM door seal 4000 has a frame 3200 adapted to be disposed between attack side door leaf 3600 and secure side door leaf 3700. As illustrated in Figure 5E, the two cooperating members 4100, 4200 traverse frame 3200.

[0115] Frame 3200 is comprised of a metal, or other suitable material.

[0116] Frame 3200 is be disposed in a gap 3700 between the attack side door leaf 3600 and the secure side door leaf 3800.

[0117] Seal 4000 may be made of copper, brass, aluminium, steel, or other RF shielding metal or RF shielding compound.

[0118] Although not illustrated, seal 4000 have an additional conductive cover made of one or more of: metal fingers, conductive gaskets, soft foam covered in conductive metal mesh, or another conductive material. The additional conductive cover may be the EM door seal 2000.

[0119] The attack side cooperating member 4100 may be a block shape or other suitable shape. The block may be a quadrilateral shape.

[0120] The secure side cooperating member 4200 may be a block shape or T-shape. The T-shape may be adapted to be disposed so a crossbar of the T-shape abuts the secure side door leaf in the shielding position. The T-shape advantageously increases the surface area of the contact surface in the abutment position.

[0121] The rod 3850 as shown in Figure 5A is an M5 screw. From the teaching herein, the skilled person is readily able to select a suitable elongate member for rod 3850. From the teaching herein a skilled person is readily able to select other suitable screws.

[0122] As shown in Figures 5E, attack side cooperating member 4100, secure side cooperating member 4200 and rod 3850 are illustrated to be separate integers. In another arrangement, attack side cooperating member 4100, the secure side cooperating member 4200 and rod 3850 are integral.

[0123] As shown in section views of Figures 5E and 5F, EM door seal 4000 has a compression spring 3900 disposed to operate on attack side cooperating member 4100 and rod 3850. In other embodiments, compression spring 3900 is be disposed on one or more of rod 3850, attack side cooperating member 4100 and the secure side cooperating member 4200. Compression spring 3900 provides a controlled lateral movement of the two cooperating members 4100, 4200. The compression spring 3900 biases the two cooperating members 4100, 4200 to the non-shielding position.

[0124] While compression spring 3900 is illustrated to be a coil spring, in other embodiments, coil spring 3900 is one or more: a metal spring, a leaf spring or another compression mechanism.

[0125] While not illustrated, attack side door leaf 3600 may have an attack side door leaf cutout 3630 to accommodate seal 4000 and the secure side door leaf 3800 may have a secure side door leaf cutout 3830 to accommodate seal 4000. The cutouts advantageously improve the shielding effect.

[0126] It is a secure side surface 3602 of attack side door leaf 3600 that impacts on the attack side cooperating member 4100. Also, secure side cooperating member 4200 is moved into an abutting position against an attack side surface 3804 of secure side door leaf 3800.

[0127] EM door seal 2000, 4000 comprises a left upright section 2002, 4002, a right upright section 2004, 4004, a head section 2006, 4006 and a bottom section 2008, 4008. Each of the left upright section 2002, 4002, right upright section 2004, 4004, head section 2006, 4006 and bottom section 2008, 4008 may have the two cooperating members 2100, 2200; 4100, 4200 along a respective length. With respect to the embodiment illustrated in Figures 5 A to 5F, a plurality of rods 3850 may be disposed at regular intervals along a perimeter of passageway 3240 accessed through attack side door leaf 3600 and secure side door leaf 3700.

[0128] The EM door seal 4000 may have the bottom section 4008 adapted to be positioned below floor level, which advantageously allows a level bottom door threshold. Advantageously, the level bottom door threshold allows a wheelchair to traverse a passage defined by the secure door frame 3200. The level bottom door threshold may comprise a door threshold member 3300 (not shown) to be positioned above a bottom section 4008 of the EM door seal. When the door threshold member 3300 is present, and positioned above a bottom section 4008, any attack side cooperating member portion located below the door threshold member 3300 will not be impacted by an attack side door leaf 3600 closing. This lack of impact below the door threshold member 3300 is because the secure side door leaf 3600 will close the passageway and extend between a top of the passageway as defined by door frame 3200 and door threshold member 3300, see the position of secure side door leaf 3800 in Figure 5F. The attack side cooperating member portion below threshold member 3300 is in a bottom part of a left upright section 4002, a bottom part of a right upright section 4004 or in a bottom section 4008.

[0129] When a level botom door threshold is present or door threshold member 3300 is positioned above a botom section 4008 of the EM door seal 4000, the secure side cooperating member 4200 does still move from the non-abuting position to the abuting position against a secure side door leaf 3800, when the secure side door leaf is in a closed position, across an entire circumference as driven by the impact above the door threshold member 3300.

[0130] Figures 5A to 5F also illustrate secure door frame 3200 having a secure door frame body 3210 adapted to receive atack side door leaf 3600 and a secure side door leaf 3800. The secure door frame 3200 has EM door seal 4000 for a double door 3600, 3700.

[0131] Secure door 3200 frame is illustrated to have an atack side 3202 and a secure side 3204. The secure door frame 3200 comprises a secure door frame body 3210 comprising a profile 3212. The secure door frame body 3200 comprises a main section 3216.

[0132] Also depicted in Figures 5A to 5F is a secure door set 3000 made up of secure door frame 3200, an atack side door leaf 3600 and a secure side door leaf 3800. As illustrated, atack side door leaf 3600 is a hinge door leaf and secure side door leaf 3800 is a sliding door leaf. From the teaching herein, double door 3600, 3800 may be two hinge door leaves; one hinge door leaf and one sliding door leaf or two sliding door leaves.

[0133] Advantageously, the seal 2000, 4000 of the invention blocks EM or RF to atenuate unwanted radiation incursions or emanations escaping and being captured by hostile actors using receivers.

[0134] The inbuilt security and flexibility of the secure doorset 1000 of the invention will be of advantage in secure applications seeking protection and adaptability according to requisite needs and requirements.

[0135] One of the advantages of secure door set 3000 is that it will be compliant with the Australian Disability Discrimination Act (DDA). Unlike most other RF doors which are fabricated with a step over at the botom of the door frame 3200 doorset 3000 allows for the botom of the door frame 3200 to be level with the floor thus allowing the compliance with the DDA.

[0136] In this specification, the terms “comprises”, “comprising” or similar terms are intended to mean a non-exclusive inclusion, such that an apparatus that comprises a list of elements does not include those elements solely, but may well include other elements not listed.

[0137] Throughout the specification the aim has been to describe the invention without limiting the invention to any one embodiment or specific collection of features. Persons skilled in the relevant art may realize variations from the specific embodiments that will nonetheless fall within the scope of the invention.

Claims

CLAIMS:The Claims defining the invention are as follows:

1. An electromagnetic (EM) door seal comprising: two cooperating members, a male cooperating member having two or more fins and a female cooperating member having two or more channels, each channel of the two or more channels dimensioned to receive respective fins of the two or more fins, each channel of the two or more channels having a resiliently deformable contact bumper disposed on each side which are deformed upon contact by a respective fin of the two or more fins.

2. A secure door leaf comprising: a secure door leaf adapted to open and close within a secure door frame, the secure door leaf comprising an EM seal having two cooperating members, a male cooperating member having two or more fins and a female cooperating member having two or more channels, each channel of the two or more channels dimensioned to receive respective fins of the two or more fins, each channel of the two or more channels having a resiliently deformable contact bumper disposed on each side which are deformed upon contact by a respective fin of the two or more fins, wherein one of the male cooperating member or female cooperating member is disposed on the secure door leaf and the other of the male cooperating member or female cooperating member is disposed on the secure door frame.

3. The secure door leaf of claim 2 wherein the one of the male cooperating member or female cooperating member disposed on the door leaf is disposed on a secure side of an attack side door leaf or an attack side of a secure side door leaf.

4. The secure door leaf of claim 2 or claim 3 comprising an attack side sheet and a secure side sheet joined together with a top plate, a bottom plate and opposing side plates disposed on each long edge of the secure door leaf.

5. The secure door leaf of claim 4 further comprising a series of fixing plates extending laterally across the door, spaced apart from top to bottom of the secure door leaf.

6. A secure door frame, the secure door frame comprising:a secure door frame body adapted to receive at least one secure door leaf, the secure door frame comprising an EM seal having two cooperating members, a male cooperating member having two or more fins and a female cooperating member having two or more channels, each channel of the two or more channels dimensioned to receive respective fins of the two or more fins, each channel of the two or more channels having a resiliently deformable contact bumper disposed on each side which are deformed upon contact by a respective fin of the two or more fins, wherein one of the male cooperating member or female cooperating member is disposed on the secure door frame and the other of the male cooperating member or female cooperating member is disposed on the secure door leaf.

7. The secure door frame of claim 6 wherein the one of the male cooperating member or female cooperating member disposed on the secure door frame is disposed on an attack side rebate section or a secure side rebate section.

8. The secure door frame of claim 6 or claim 7 wherein the secure door frame body comprises a main section, an attack side rebate section and a secure side rebate section.

9. The secure door frame of claim 8 wherein the attack side rebate section receives an attack side door leaf and the secure side rebate section receives a secure side door leaf.

10. The secure door frame of any one of claims 6 to 9 comprising a threshold plate.

11. A secure door set comprising a secure door frame of any one of claims 6 to 9 and a secure door leaf according to any one of claims 2 to 5.

12. The secure door set of claim 11 comprising an attack side door of any one of claims 2 to 5 on an attack side of the door frame and a secure side door leaf of any one of claims 2 to 5 on a secure side of the door frame.

13. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of the above claims wherein each bumper is comprised an EM shielding material, optionally an EM shielding material selected from copper, bronze, aluminium, gold and brass.

14. The EM door seal, secure door leaf, secure door frame or secure door set according to claim 13 wherein each bumper is comprised of beryllium copper.

15. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of the above claims wherein the deformation of the bumper comprises a compression.

16. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of the above claims wherein the one or more fins are disposed to be side by side along a side of a door set and top to bottom along a top and bottom of a door set.

17. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of the above claims wherein the one or more channels are disposed to be side by side along a side of a door set and top to bottom along a top and bottom of a door set.

18. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of the above claims wherein the male cooperating member and the female cooperating member extend along the complete perimeter of the door set.

19. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of the above claims wherein one or more bias selectively impels one of the cooperating members to accommodate movement of the cooperating member as it engages with its respective associated male or female cooperating member during pivotal opening and closing of the door leaf.

20. The EM door seal, secure door leaf, secure door frame or secure door set according to claim 19 wherein the one or more bias impels one of the cooperating members in a transverse direction across the width of the door.

21. The EM door seal, secure door leaf, secure door frame or secure door set according claim 19 to claim 20 wherein each of the one or more bias comprises a spring such as, a coil spring.

22. The EM door seal, secure door leaf, secure door frame or secure door set according to any one claims 19 to 21 wherein cooperating members located at the top and bottom of the door are joined at their ends to cooperating members located at the sides of the door to form a rectangular frame, and the entire frame moves in unisonin a transverse direction across the width of the door during opening and closing of the door leaf.

23. The EM door seal, secure door leaf, secure door frame or secure door set according to any one claims 19 to 22 wherein a hinge side of the door set comprises an extension bias and a lock side of the door set comprises a compression bias.

24. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of claims 19 to 22 wherein a hinge side of the door set comprises a compression bias and a lock side of the door set comprises an extension bias.

25. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of claims 19 to 24 wherein the one or more bias acts on a seal containment member.

26. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of the above claims wherein a top and bottom of the door set, the door leaf and / or door frame are free of any bias.

27. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of claims 19 to 26 wherein the one or more bias is disposed at regular intervals along a length of door frame.

28. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of the above claims wherein one of the one or more cooperating members are housed in a seal containment member.

29. The EM door seal, secure door leaf, secure door frame or secure door set according to claim 28 wherein the female cooperating member is housed in the seal containment member.

30. The EM door seal, secure door leaf, secure door frame or secure door set according to claim 28 wherein the male cooperating member is housed in the seal containment member.

31. The EM door seal, secure door leaf, secure door frame or secure door set according to claim 28 wherein the seal containment member comprises a member body having a base and a flange either side of the base.

32. The EM door seal, secure door leaf, secure door frame or secure door set according to claim 31 wherein the flange either side of the base extend beyond the base.

33. The EM door seal, secure door leaf, secure door frame or secure door set according to claim 31 the two or more channels are disposed between the flanges.

34. The EM door seal, secure door leaf, secure door frame or secure door set according to any one of claims 28 to 33 wherein the seal containment member is disposed in a mounting box dimensioned to allow travel of the seal containment member as impelled by the one or more bias.

35. The EM door seal, secure door leaf, secure door frame or secure door set according to claim 34 wherein the mounting box comprises a mounting box body having void walls defining a void and rebate walls defining a rebate channel wherein the rebate channel is wider than the void to allow travel of the flanges.

36. An EM door seal for a double door, the EM door seal comprising: two cooperating members, an attack side cooperating member and a secure side cooperating member, the attack side cooperating member and the secure side cooperating member connected by a rod, the attack side cooperating member adapted to be impacted by an attack side door leaf closing and the secure side cooperating member adapted to move from a non-abutting position to an abutting position against a secure side door leaf, when the secure side door leaf is in a closed position.

37. An EM door seal according to claim 36 wherein the impact of the attack side door leaf closing on the attack side cooperating member moves the attack side cooperating member in a direction spanning a gap between the attack side door leaf and the secure side door leaf.

38. The EM door seal of claim 36 or claim 37 having a frame adapted to be disposed between an attack side door leaf and a secure side door leaf of the double door.

39. The EM seal of any one of claims 36 to 37 having an additional conductive cover made of one or more of: metal fingers, conductive gaskets, soft foam covered in conductive metal mesh, or another conductive material.

40. The EM seal of claim 39 wherein the additional conductive cover is the EM door seal of any one of claims 1 to 35.

41. The EM seal of any one of claims 36 to 40 wherein the attack side cooperating member has a block shape.

42. The EM seal of any one of claims 36 to 41 wherein the secure side cooperating member has a T-shape.

43. The Em seal of any one of claims 36 to 32 wherein the rod is a screw such as, an M5 screw.

44. The EM door seal of any one of claims 36 to 43 comprising a compression spring.

45. The EM door seal of any one of claims 36 to 44 wherein the attack side door leaf has an attack side door leaf cutout to accommodate the seal of the fifth aspect.

46. The secure side door leaf of any one of claims 36 to 45 wherein the secure side door leaf has a secure side door leaf cutout to accommodate the seal of the fifth aspect.

47. The EM door seal of any one of claims 36 to 45 having a left upright section, a right upright section, a head section and a bottom section.

48. The EM door seal of any one of claims 36 to 47 wherein each of the left upright section, right upright section, head section and bottom section has the two cooperating members along a respective length.

49. The EM door seal of any one of claims 36 to 48 wherein a plurality of rods are disposed at regular intervals along a perimeter of a passageway.

50. The EM door seal of any one of claims 36 to 49 wherein the bottom section is adapted to be positioned below floor level.

51. The EM door seal of claim 50 wherein the level bottom door threshold comprises a door threshold member positioned above the bottom section of the EM door seal.

52. A secure door frame, the secure door frame comprising: a secure door frame body adapted to receive an attack side door leaf and a secure side door leaf, the secure door frame comprising an EM door seal for a double door having two cooperating members, an attack side cooperating member and a secure side cooperating member, the attack side cooperating member and the secure side cooperating member connected by a rod, the attack side cooperating member adapted to be impacted by the attack side door leaf closing and the secure side cooperating member adapted to move from a non-abutting position to an abutting position against the secure side door leaf, when the secure side door leaf is in a closed position.

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