Apparatus for affixing a strain wire into the wiring of flexible

Details Apparatus for affixing a strain wire into the wiring of flexible Apparatus for affixing a strain wire into the wiring of flexible

1997-01-02

1998-06-09

Kincaid, Kristine L.

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

174135, 285114, H02G 318

Patent

active

057638322

ABSTRACT:
A junction box connector and resulting assembly are disclosed that facilitate the inclusion of a strain wire. The strain wire relieves the load placed upon the cable or flexible conduit and cable combination that extends between the junction box and another similar connection. In a preferred embodiment, a connector that has a section extending inside the junction box is provided with a longitudinal slit, and the strain wire is placed within this slit. A locking device such as a threaded nut presses the wire down against the side of the junction box, creating a mechanical clamping effect, thereby providing an appropriate connection able to resist loads placed upon the structure. Preferably, the present invention is used with flexible conduit and the flexible conduit encapsulates an integral strain wire. In certain embodiments, the flexible conduit is filled with fire resistant material and marked with standard units of length.

REFERENCES:
patent: 1204625 (1916-11-01), Wheelock
patent: 2250685 (1941-07-01), Tiefenbacher et al.
patent: 2674470 (1954-04-01), Appleton
patent: 3076655 (1963-02-01), Washburn, Jr.
patent: 3104120 (1963-09-01), Myers
patent: 3643290 (1972-02-01), Milne
patent: 4312563 (1982-01-01), Mead
patent: 4616105 (1986-10-01), Borsh
patent: 4711974 (1987-12-01), Borsh
patent: 4809937 (1989-03-01), Emory, Jr.
patent: 5090644 (1992-02-01), Lenker

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