Cable and apparatus interface security device

Abstract

A sealing assembly for a cable to apparatus interconnection formed by a plurality of shells adapted to mate together, surrounding the interconnection within an interconnection space. When mated together, the shells forming openings for the cable and the apparatus at an apparatus end and a cable end, respectively. A gasket mounted to each shell along a mating surface between the shells and along the openings environmentally seals the interconnection space. A locking rib projecting inward from the shell(s) may be applied to rotationally interlock a coupling nut of the interconnection with the sealing assembly. In a two shell embodiment, a locking band positioned around an outer diameter of the mated together shells with an end to end retaining means may be used to secure the shells together. Alternatively, if three shells are used, the shells may be hinged together and a retaining means applied to join the unhinged ends together.

Description

BACKGROUND OF INVENTION [0001] 1. Field of the Invention [0002] The invention relates to a device for environmentally sealing and securing the interconnection between cables and or apparatus, for example feed and or control cables interconnected with an antenna. [0003] 2. Description of Related Art [0004] Electrical interconnections are subject to degradation from environmental factors such as moisture, vibration and repeated expansion and contraction from daily temperature changes. [0005] Environmental seals such as an outer sealing enclosure that surrounds an electrical interconnection have been used, for example, to surround a cable end connector to cable end connector interconnection. The, for example, injection molded plastic enclosures have been configured to surround the cable interconnection with two halves in a clamshell hinged configuration that is sealed with a gel composition at cable exit points proximate either end. Alternatively, the enclosure may be entirely filled w...

AI Technical Summary

Benefits of technology

[0027] A plurality of locking rib(s) 13 or the like may be formed on internal surfaces of the shell 3 halves projecting into the interconnection space 4, dimensioned to contact a coupling nut 15 which mates with the apparatus connector body 9 to connect the cable 7 to the apparatus. The locking rib(s) 13 prevent rotation of the coupling nut 15 within the interconnection space 4, thereby inhibiting unthreading of the coupling nut 15.

[0033] Because the shell 3 wedges section the circumference of the sealing assembly 1 into thirds, the opportunity for pinching of the gasket(s) 11 during closure is reduced. The locking band may be omitted because when closed, the shell 3 wedge geometry of the second embodiment improves equalization of the pressure between adjacent gasket 11 surfaces and inwards towards the cable 7 and apparatus connector body 9. To form an improved seal at the junction between each adjacent gasket 11 and the cable 7 or apparatus connector body 9, protruding compensation spike(s) 37 as shown for example in FIG. 10 may be formed in the gasket 11. The increased gasket material added via the compensation spike(s) 37 increases the sealing pressure between the gasket(s) 11 and also against the cable 7 or connector body 9.

[0034] As demonstrated in the second embodiment, the gasket(s) 11 may be adapted to have increased contact area via an increased width along the longitudinal axis of the cable 7 to improve sealing against, for example, a range of different possible annular or helical corrugations that may be formed in the outer conductors of the various cable(s) 7 that the sealing assembly 1 may be installed upon. To minimize the expense of additional gasket 11 material, the increased contact area may be formed with an inner groove 39 that divides the seal into two separate seals.

[0036] From the foregoing, it will be apparent that the present invention brings to the art a sealing assembly 1 useful, for example, for re-useable sealing of cable to apparatus connections having improved performance, ease of installation and significant manufacturing and installation cost efficiencies. Table of Parts1sealing assembly2opening3shell4interconnection space5mating surface7cable9apparatus connector body11gasket13locking rib15coupling nut17locking band19hook20hinged portion21fin23shoulder25inward projecting protrusion27closure point29outward projecting protrusion31depression33hole35locking bar37compensation spike39inner groove

Problems solved by technology

Electrical interconnections are subject to degradation from environmental factors such as moisture, vibration and repeated expansion and contraction from daily temperature changes.

However, gel sealing compositions are typically limited to environments where the temperature will be 60 degrees Celsius or less.

Also, in the frequently vertical configuration of a cable to antenna attachment, a sealing system using gel near the maximum specified temperature may become compromised due to gel migration and or leakage.

The prior enclosures typically use multiple hook into slot closure configurations which, once closed, may be difficult to open, especially when installed in exposed locations such as atop radio towers.

Gel seals are typically not reusable and or have only a limited number of re-uses before they must be replaced.

Vibration may lead to loosening and eventual release of threaded interconnections.

Therefore, an enclosure that provides an acceptable environmental seal may fail to prevent vibration, for example induced by wind upon exposed cable runs along radio towers, from eventually loosening and degrading the mechanical and electrical interconnection of the enclosed connector(s).

Feed and or control cable connections to antennas are also subject to environmental degradation.

The reliability of this form of manually applied seal is dependant upon the training and motivation of the installation personnel, which may be negatively influenced by the often hazardous and or environmentally exposed locations, for example high atop radio towers, where they are installed.

Further, once installed, a sealing wrap must be destroyed to again access the interconnection.

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