261results about "Dobbies" patented technology

A variety of embodiments are disclosed, in both apparatus and method form, that relate to the use of fabric material in the manufacture of an air bag deployment system. In addition, fabric weakening is disclosed according to a technique that does not result in physical alteration of the fabric. This invention therefore includes an air bag cover for an air bag safety system for a vehicle comprising a fabric outer layer having a frontside and a backside and a substrate containing an opening wherein the opening has a periphery. The substrate is preferably formed by low pressure molding, wherein the fabric outer layer overlies the opening in the substrate, and wherein the fabric outer layer is weakened at a location that is adjacent or overlies the substrate opening periphery.

The heald shafts of a power loom are driven by electric D.C. or A.C. motors which have a external rotor or an armature connected to the respective heald shaft through two articulated couplings, for example snap locks, and a push-pull rod. The motors receive control signals from a computerized controller for reversing the motion direction of the external rotor or armature. The stators of the motors are rigidly mounted on a fixed axis secured to the loom frame.

An electrical rotating apparatus for controlling a harness cord associated with the shed of a weaving loom which includes an actuator including a rotor and a stator. The rotor is formed of at least two permanent magnets which are mounted within a tube so as to be spaced axially with respect to one another and wherein a plurality of stator elements are also provided offset axially relative to an axis of rotation of the rotor such that each of the plurality of rotors corresponds with a separate one of the plurality of stators. The polarities of one or the other of the permanent magnets or the stator elements are offset angularly relative to the axis of rotation.

A novel rod linkage for driving a heddle shaft includes at least one strap (16), which for damping oscillation has a sandwich structure (37) oriented in the longitudinal direction (L) of the strap assembly (16). The sandwich structure includes at least one rigid element (27), extending in the longitudinal direction, which is joined to one end (17) of the strap assembly (16); a second rigid element (31), likewise extending essentially in the longitudinal direction, which is joined to the other end (19); and a two-dimensional damping element (34), again extending in the longitudinal direction, disposed between the first two. The element (34) exclusively effects the mechanical connection of the two parts (16a, 16b) of the strap assembly (16). Preferably, no additional connecting elements, such as rivets, screws, or other rigid connections, between the rigid elements (27, 31) are provided. Preferably, the rigid elements (27, 31) are embodied as wedges pointing in opposite directions, which thus define a wave resistance that varies in opposite directions in the longitudinal direction. This wave resistance brings about an intentional coupling misadaptation with respect to the oscillation transmission. The element (34) disposed between them damps the oscillations additionally, so that the strap assembly (16) transmits driving motions like a filter and destroys or absorbs interfering oscillations.

The invention provides a method for producing an imitation jacquard pattern by adopting a dobby machine, comprising the following steps of: carrying out gradually advancing method combination on a warp arrangement sequence of original yarns by taking an original small figure as a blueprint, that is to say, advancing one digit number by taking every N numbers, and orderly gradually advancing till circulation is finished, wherein N is a multiple to be amplified in a warp direction; also carrying out gradually advancing method combination on a weft arrangement sequence of the original yarns, that is to say, advancing one digit number by taking every M numbers, and orderly gradually advancing till the circulation is finished, wherein M is a multiple to be amplified in a weft direction. The area of the produced imitation jacquard pattern is N*M times larger than that of an original small figure pattern. The method not only has low cost, but also has high efficiency, solves the problem of production of jacquard shell fabrics and can also produce the jacquards with different effects.

On the one hand, the invention relates to a device for exerting a return force on at least one harness element of the harness of a Jacquard weaving machine, comprising at least one return spring (2) provided with means of attachment (1) for attaching the return spring (2) to retaining means (4) being immovably provided, said means of attachment (1) being provided with a positioning opening (6) for positioning the means of attachment (1) with respect to the retaining means (4), and a fixing opening (7) for fixing the means of attachment (1) to the retaining means (4), a spring connection (8) being provided between the positioning opening (6) and the fixing opening (7), in such a manner that the means of attachment (1) are able to move from positioning opening (6) to the fixing opening (7) with respect to the retaining means (4), but after having been fixed will be unable to move back from the fixing opening (7) to the positioning opening (6) with respect to the retaining means during operation or transport of the Jacquard machine.

On the other hand, the invention relates to a device for immovably installing the retaining means (4) of one or several return springs (2) of a Jacquard weaving machine, the device being provided with at least two fixed installing elements (13) for installing the retaining means (4), the said installing elements (13) being provided with one or several recesses to apply the retaining means (4).

A novel shaft gear for harmonious engagement and disengagement of individual heddle shafts and for deriving their motion from the rotary motion of a single input shaft has a coupling system with two input elements. While one of the input elements serves to drive the output element of the coupling system permanently, the other input element serves solely to synchronize the output element briefly with the first input element. The switchover takes place in the brief synchronous phases, in selected angular regions that correspond to the top or bottom reversal point of the heddle shaft. For the switchover, such novel shaft drive mechanisms do not require any stoppage of motion for the input shaft or the shaft drive mechanism.

The invention relates to a multilayer cloth multi-shed water jet loom, which comprises a front rack and a rear rack, wherein a multi-arm mechanism is arranged above the front rack, a heald frame assembly controlled by the multi-arm mechanism is arranged below the front rack, the left side of the front rack is provided with a weft insertion mechanism, and the rear part of the front rack is provided with a ground warp weaving shaft; and a seam warp weaving shaft and a tension compensating device are arranged on the rear rack. The multi-arm mechanism enables warps passing through harness wires in a seam warp heald frame to form six warp positions and five sheds; the weft insertion mechanism can simultaneously jet five wefts in the five sheds up and down, and multilayer cloth of less than or equal to five layers can be woven by weft insertion and battening; and the seam warp weaving shaft and the tension compensating device enable seam warps to be conveyed at a constant speed and subjected to seam warp tension compensation in a single seam warp heald frame so as to meet weaving of the multilayer cloth of less than or equal to five layers with a comparatively complex tissue structure. The multilayer cloth multi-shed water jet loom has the advantages of doubled production efficiency, production variety increment, wide application and the like.

The present invention provides a heald-frame height adjusting apparatus to make it possible to overcome the problems by providing a heald-frame height adjusting apparatus that easily adjusts the height of a heald frame and that reduces manufacturing costs of a shedding device, and that does not allow the shedding device to easily malfunction and that is suitable for high-speed vertical movement of the heald frame. A heald-frame height adjusting apparatus used in a shedding device including a drive transmission mechanism which is provided in accordance with each heald frame, which connects a reciprocating driving device and a heald frame with each other, and which is capable of changing a supporting height of the corresponding heald frame. The heald-frame height adjusting apparatus includes engaging means and raising-lowering means, the engaging means being engageable with and disengageable from the heald frame and being engaged with the heald frame when the height of the heald frame is adjusted before starting an operation of a loom, the raising-lowering means being placed at a securing portion of the loom and moving the engaging means vertically with respect to the securing portion.

A first (1) and a second connecting means (2) which may be connected in a detachable manner in order to connect a first and a second cord, more particularly a lifting cord and a harness cord of a Jacquard machine, the first connecting means (1) comprising an elastically deformable coupling element (3) which may be received in a receiving part (4) of the second connecting means and may be retained in axial direction, the second connecting means (2) comprising a passage (5) through which the coupling element (3), compressed in the radial direction, may be moved to the receiving part (4) and the coupling element (3) in the receiving part (4) having the possibility of adopting a larger radial dimension than is necessary to be moved through the passage (5), so that the coupling element (3) snap-fits in the receiving part (4). In the receiving part (4), the coupling element (3), by rotation around the longitudinal axis (A), may be brought into a disengaging position in which it is not retained.

The invention relates to a Jacquard machine, comprising 2 sets of knifes moving up and down in opposition, which each, at each of their extremities, are taken up in separate knife grids (4a, 4b) being driven by a cinematic drive chain (30), and each, at one of their extremities (20a, 20b), being guided into a straight motion by means of a “Watt's linkage” rod system, the height of lift of each of these extremities (20a, 20b) of the knife grids (4a, 4b) being adjustable, and the knife grids (4a, 4b) each at their first extremities (20a, 20b) being linked with at least one first driving lever (2, 2a, 2b, 10) by means of a first linking rod (3a, 3b), and at their second extremities (21a, 21b) being linked with at least a second driving lever (2, 10) by means of a second linking rod (14a, 14b), wherein per knife grid (4a, 4b) one or several elements (1, 101, 1a, 1b, 3a, 3b) of the Watt's linkage rod system are part of the cinematic drive chain (30), and the amplitude of the motion of the said extremity (20a, 20b) of the knife grid (4a, 4b) is adjustable in the cinematic drive chain (30) before the linking point (9a, 9b) between the first rod (1, 101, 1a, 1b) and the third rod (3a, 3b) of the Watt's linkage rod system with respect to the drive motor.

The invention discloses a time-adjustable warp tension control device of a loom. The device comprises a beam, warp, a back rest, a tension rod, a guide groove, a tension rod lifting rope, a guide roller, a guide roller lifting rope, a heald lifting hook, a hoisting arm, a heald lifting arm, a heald lifting rope, a heald and a spring. The device has the simple mechanism and is convenient to adjust, no driving mechanism or motor is added, all that is required is to drive a tension adjusting device by the aid of an idle dobby heald lifting hoisting mechanism of the existing loom in a linkage manner, the dobby heald lifting page number is 14-16, and 2-14 pages are generally used for weaving common three-elementary weave fabric, mini-jacquard and complex fabric.

The shed formed by the warp threads in a loom is changeable by a shed drive that may either be an eccentric drive or a shaft drive. In order to rapidly exchange one shed drive (2) by another shed drive (3) these shed drives are mounted individually in a respective carriage (4). The carriage is constructed for docking in an exchange position next to the loom. An empty first carriage can take up a shed drive currently cooperating with the loom to remove the shed drive from the loom. A second carriage carrying another shed drive can then dock in the exchange position after the second carriage has been removed. The carriage is positionable either manually or automatically in response to distance signals.

An electronic needle selecting mechanism of a passive multi-arm device belongs to the technical field of textile machine and comprises a signal supply device and an execution device that consists of a first transverse needle and a second transverse needle; the signal supply device comprises a bracket, a group of electromagnetic valves and a group of transverse needle actuating devices; the amount of the group of the electromagnetic valves is equal to the total amount of the first transverse needles and the second transverse needles; all electromagnetic valves are arranged in the length direction of the bracket and used for actuating the transverse needle actuating devices; the amount of the group of the transverse needle actuating devices is equal to the total amount of the first transverse needles and the second transverse needles; and all transverse needle actuating devices are arranged on the bracket, connected with the electromagnetic valves and matched with the first transverse needles and the second transverse needles, thus actuating the first transverse needles and the second transverse needles. The electronic needle selecting mechanism prolongs the service life of the signal supply device, can ensure working reliability, stability and adaptability of the signal supply device, is beneficial to reducing usage cost, and simplifies the whole structure.

The invention provides a three-shed device of a rotary electronic dobby and belongs to the technical field of textile machinery. The rotary electronic dobby comprises a tank body, a heald lifting arm driving mechanism and a heald lifting arm mechanism, wherein the heald lifting arm driving mechanism is arranged in a tank body cavity of the tank body through a spindle; the heald lifting arm mechanism is arranged in the position, corresponding to the left side of the heald lifting arm driving mechanism, in the tank body cavity of the tank body through a heald lifting arm shaft and is connected with the heald lifting arm driving mechanism. The three-shed device comprises a pair of supporting seats, a swing arm mechanism and a heald frame three-shed heald lifting blade mechanism, wherein the supporting seats correspond to each other and are fixed with one side, opposite to the tank body cavity of the tank body, of the left tank wall when in a state perpendicular to the left tank wall of the tank body; the swing arm mechanism is supported between the pair of supporting seats and is connected with the heald lifting arm mechanism; the heald frame three-shed heald lifting blade mechanism is connected with the swing arm mechanism. The three-shed device of the rotary electronic dobby has the following advantages: resources are saved, and the requirement for three sheds of a loom for weaving pile warp fabric is met; the integral structure is concise, and the rotary electronic dobby in the prior art can be subjected to addition improvement, so that economic cheapness can be reflected.

A flame retardant union fabric obtained by combining (A) 30 to 70% by weight of a fiber comprising as a main component a flame retardant halogen-containing fiber made of a composition comprising 100 parts by weight of an acrylic copolymer of 30 to 70% by weight of acrylonitrile, 30 to 70% by weight of a halogen-containing vinyl monomer and 0 to 10% by weight of a vinyl monomer copolymerizable with them, 10 to 30 parts by weight of an antimony compound and 8 to 30 parts by weight of a zinc stannate compound, with (B) 70 to 30% by weight of a cellulosic fiber. The flame retardant union fabric shows a high flame resistance which passes the M1 class of NF P 92-503 burning test in France even after the post-treatment.

The dobby according to the invention comprises, at the level of each of its blades, an oscillating piece associated with an actuation element, at least one mobile coupling member borne by the actuation element and two pivoting levers subjected, on the one hand, to the action of a reading device and, on the other hand, to that of elastic means which tend to engage catches of the pivoting levers either with a jamming surface provided on the actuation element, or with the coupling member, while the lever in engagement with the jamming surface is out of range of a selector of the reading device. In addition, mechanical members independent of the reading device are adapted to displace, against the action of the elastic means, a lever whose catch is not in engagement with the jamming surface, with the result that it does not interfere with the angular displacement of the selector.

A connecting device for connecting a motion transmission element to a heddle frame in a weaving loom wherein the connection device includes a tenon member and mortise member which are cooperatively engaged with respect to one another. The tenon member includes a nut mounted to the transmission element, an anchoring block through which the transmission element extends and which cooperates with surfaces of the mortise member, a bush through which the transition element passes and which bush cooperates in rotation with the nut and which also includes a counter-nut for securing the bush against the anchoring block.