US911267A - Connector for electrical wires, cables, and conduits. - Google Patents

Description

R. W. PITTMAN. cor'mzcwon FOR ELE GTRIOAL WIRES, GABL ES, AND GONDUITS. APPLIOATIONIIL'ED 00T.11, 1907.

Patented Feb. 2, 1909.

5 Woe 14 4306 @Mfi REINHART W. PITTMAN, or NEW YORK, N. Y.

CONNECTOR FOR ELECTRICAL WIRES, GABLES, AND CONDUITS.

Specification of Letters Patent.

Patented Feb. 2, 1909.

Application filed October 11, 1907. Serial No. 396,896.

T 0 on whom ti may concern:

Be it known that I, R-EINHART W. Prr'r- MAN, of the borough of Manhattan, city, county, and State of New York, have invented a certain new and useful Improvement in Connectors for Electrical Wires, Cables, and Conduits, of'which the following is a specification.

This invention relates to devices in the nature of fittings designed for rigidlv securing together the ends of electric conductors and conduits, and for the attachment of the same to panel, outlet or junction boxes,-

For use as a coupling for the attachment of the conductor or conduit to'a box, or the 'like, connection of the coupling is made with a bushing which is rigidly aflixed to the box.

In the drawing accompanying the present specification, Figure 1 is a sectional view illustrating features of the invention as applied to the securing of a cable conduit to a box. Fig. 2 is a race view of one of the coupling pieces assembled with its bushing,

a portion of the box being in section. F g.

3 1s a perspective view of the bushin" indicated in the preceding figures. Fig. 4 is a perspective view of one of the clamping pieces. Fig. 4* is a detail of the inwardly- -projecting edge of the clamping piece. Fig.

5 is mainly an elevation of a modified construction parts being broken away.

Similar characters of reference designate corresponding parts in all the figures.

The clamping pieces constituting the present coupling are substantially alike and are preferably made of stamped metal, although other methods of manufacture may be adopted.

Referring to Figs. 1 to 4, inclusive, in which the invention is illustrated as embodied in a device for connecting an armored cable or conduit to a; box, 2, 2, designate a pair of clamping pieces curved transversely to embrace conduit 3, and having substantially diametrically opposite ears 2 perforated for the passage of tightening and holding devices, as bolts 4.

A box is indicated and designated by 5. An opening in this box is adapted to receive the threaded stem 6 of a bushing 6, which may be held in position by a nut 7 engaging .Wltll the thread of the stem and when in its assembled position, holding a shoulder (i on the bushing firmly against the outer surface of the box. v y

For the purpose of securing th'e'couplmg to the bushing, I may adopt the means indicated in Figs. 1, 2, 3 and 4, in which bushing 6 is shown as provided with lateral projections 8, 8, adapted to pass through openings 9 in the clamping pieces 2, 2, and firmly locking the coupling to the bushing. Instead, however, of perforating the clamping pieces to receive the projections on the bushing, each clamping niece may be formed with an inwardly-recessed hook-shaped end 10, (see Fig. 5), adapted to fit over an annular rib or projection 11 on the bushing. This construction, it is evident, operates in substantially the same wayas the former one to lock the assembled coupling and clamping conduit,'etc., to the bushing.

In the event of its being. desirable to have a still more positive attachment of the armor or conduit with the coupling the latter ma be provided with a projection, which, w en the parts are assembled, extends into the encircled conduit. Thus, for instance, one of the clamping pieces, (see Fig. 4) may have one of its ends turned over to form a helical, inwardly-extending projection 13, adapted to fit into the helical crease present on the exterior of the usual flexible conduit.

It will be observed that both of the described constructions for attaching the coupling pieces to the bushing,- present oppositely disposed, substantiallyparallel walls placed walls of project- ions 8, 8, or projection 11, and thereby hold the pieces firmly, yet removably, to the bushin These walls construction shown in Fig. 5 and w" ,-'w, in the construction set forth in the remaining figures, and obviously lie in planestrans verse to the axis of the assembled coupling pieces.

Having described my invention, I claim:

1. The combination with a bushing, adapted to be attached to a box, of the character described and having transversely extending oppositely disposed substantially parallel walls lying adjacent tothe box when so attached, of a pair of removable clamping pieces having walls similar to those described adapted to coacttherewith when the parts are assembled, and means for securing said clamping pieces together.

2. The combination with a bushing adapted to be attachedto a box of the character described and having transversely extend adapted to coaot' withthe correspondingly of the pieces are designated by w, w, in the I ing oppositely disposed substantially paraldescribed and having transversely extendlel Walls lying adjacent to the box when so ing, oppositely disposed, substantially paralattached, of a pair of removable clamping lel Walls lying adjacent to the box when so 15 pieces securable together along one pair of attached, 01": a pair of removable clampin contiguous edges and having Walls similar pieces having Walls adapted to engage saic to those described adapted to coact theretransverse Walls of the bushin and to ex- With when the parts are assembled, ears protend around said bushing, and means for jecting from the opposite pair of contiguous securing said clamping pieces together. edges of said clamping pieces, and fastening i REINHART W. PITTMANv bolts engaging with said ears. l itnesses:

3. The combination with a bushing adapt- I Pir'zsoiv L. VVnLLs, ed to be attached to a box of the character R. J. SACHERS.

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