US282317A

US282317A - Chables h

Info

Publication number: US282317A
Authority: US
Publication date: 1883-07-31
Anticipated expiration: 1900-07-31

Description

(No Model.)

C. H. HINDS.

JOINT TOR ELECTRIC LIGHT BRAGKBTS. No. 282,317. f Pa'tentedJuly 31. 1883-.

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UNITED STATES PATENT Prien@ CHARLES H. HlNDS, OF NEV YORK, N. Y.

JOINT FOR ELECTRIC-LIGHTI BRACKETS.v

SPECIFICATION forming part of Letters Patent No. 282,317, dated July 31, 17883.

Application filed December 20, 1882. (No model.)

Tov all whom, it may concern:

Beit known that I, GrrARLEs H. HINDs, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Joints for ElectricLight Brackets, of which the following is a specication.

This invention relates to a bracket-j oint which is so constructed that a permanent and positive connection of the conducting-wires is maintained, whatever may be the position of the joint, and at the same time an open passage for illuminating-gas is maintained.

Thepeculiar and novel construction of my bracket-joint is pointed out in the following speciiication and -illustrated in the accompanying drawings, in which- Figure l represents a vertical central section. Fig. 2 is a horizontal section in the plane m Fig. 1, looking in the direction of arrow l. Fig. 3 is a similar section of the same, looking` in the direction of arrow 2.

. Similar letters indicate corresponding parts. In the drawings, the letter A designates a short tube, which is provided with internal screw-threads, a b, at both ends, and with a tubular projection, c, on one side, into which is fitted a pipe, B.' ln the interior of the tube A is firmly secured by set-screws d d, Fig. 2, a compound plug, C, two sides of which are cut away, so as to leave open spaces for the passage of the illuminating-gas. Said compound plug consists of a central metallic stud, c, a metallic ring, f, and an insulating-sup port, g, the stud e extending through the center of this support, while the ring f embraces the same at its top. The upper surfaces of the stud and of the ring project above the surface of the insulating-support. To the metallic stud c is secured by a clamping-screw, h, the conductor 10, while the other conductor, 11, is secured to the plug C by a clampingscrew, z', which is in metallic contact with the ring f, but insulated from the stud e.

Into the top of the tube A is itted the swivel-head D, from oneV side of which extends the pipe E. Into the inner end of said swivel-head is fitted the compound plug F,

Fig. 4, the stud j and ring It' being made to project beyond the exposed surface of the insulating-support.

On the inner edge of the swiv`cl-head D is formed a shoulder, m, and over this shoulder is placed a screw-cap, G, which nts the screwthread in the upper end of the tube A. By means of this screw-cap the swivel-head is depressed and the exposed surfaces of the stud j and ring 7c of the plug F can be brought in close contact with the exposed surfaces of the stud e and ring f of the plug C.

In order to insure perfect metallic contact, the exposed surfaces of the studs j c and rings kf are ground together, so that the swivelhead can be turned round without disturbing such contact. rlhe shoulder m of the swivelhead is ground against the inner surface of the screw-cap G, and this cap is provided with a jam-nut, n, so that it can be locked in the required position.

The conductor l0* is secured to the plug F by the clamping-screw o, which is in metallic contact with the stud j and the conductor 11* is either soldered or otherwise firmly secured to the metallic ring lc. The bottom end ofthe tube A is closed by screw-cap H, and the conf ductors 10* 1l* pass freely through channels formed for this purpose in the insulating-sup port Z of the plug F, leaving sufficient space for the passage of the illuminating-gas.

From this description it will be seen that if the pipe B is stationary the pipe E, with the swivel-head D, plug F, and conductors 10d lldi, can be freely turned in either direction without disturbing the positive metallic contact between the conductors l0* l() and 11:A

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fore described, of the tube A, the compound plug C, composed ol' the metallic stud c, nietallie ring j', aud insulating-support g, the swivel-head D, the compound plug F, composed of the metallic stud 7' the metallic ring` kg and the insu]ating-support Z, and the conductors l0* l1* l0 1l, fastened to the studs cj and ringsflr, respectively, so as to preserve a permanent positi ve metallic contact between the conductors l0* 10 and 11.* 1l, respective 1o ly, if the swiveled head is turned round. In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

CHAS. lil. HINDS. [L s] lVituesses W. HAUFF,

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