US375117A - Sigmund bergmans - Google Patents

Description

S. BERGMANN.

INVENTUB: fw e? Patented Dee. 20, 1887.

N, PETERS. enexeurhegmpm. wnmngeen, n. c.

(No Model.)

COMBINED GAS AND ELECTRIC LICHT FIXTURE.

ATTEST:

Onu/CIL UNITED STATES PATENT OFFICEO SIGMUN D BERGMANN,

OF'NEW YORK, N. Y.

COMBiNED GAS AND ELECTRIC-LIGHT FIXTURE.

SPECIFICATION forming part of Letters Patent No. 375,117. dated December 20, 1887.

i Application tiled October 31,1884. Serial No. 146,888. (No model.)

To all whom, it may c onicern:

Be it known that I, SIGMUND BERGMANN, of New York, in the county and State of New York, have invented a certain new and useful Improvement in Combined Gas and Electric Light Fixtures, of which the following is a specification.

The object of my invention is to produce a more practical and efficient construction of swinging brackets for use with either gas or the incandescent electric light than has heretofore been in use. In accomplishing this object I employ two rigid jointed hollow arms one for conveying gas, the other inclosing flexible electrical conductors extending through it from end to end. These two parts are connected and pivoted together, so as to swing simultaneously. One terminates in a gas tip or burner, the other in a socket for holding an ineandescing electric lamp.

Since it is necessary to have a tight connection between the relatively swinging parts of the gas-bracket in order to convey the gas, and since it is practically impossible in making the parts to cause them to fit perfectly and without any inaccuracy, I make the connection between the swinging parts of the electriclight arm a loose one, so that the gas and electriclight arms may swing truly together in spite of such necessary inaccuracies of construction, for if both joints were rigid and the parts were not accurately fitted one part or another would be likely to be broken or bent in swinging the fixture.

In the accompanying drawings, Figure l is a view in elevation of a singleswing bracket, and Fig. 2 a view of a double-.swing bracket, each embodying my invention; and Fig. 3 is an enlarged sectional view of the inner end portion of a bracket.

rI he bracket consists of two hollow arms, a, Fig. 1, or a a', Fig. 2, and b b', Fig. l, or b b b2, Fig. 2, both jointed at c c', as will be presently explained. The jointed arm a or a c is a gas-conveying arm and terminates in the gas-burner d. The jointed arm b b or b b b2 incloses two flexible separately-insulated electrical conductors, c e, which pass through the joints of the arm and enter the socket f, attached to the end of the tube, where they are connected, as usual, to terminals, with which -to the screw-hole.

the terminals of the incandescing electric lamp y make contact when the lamp is screwed into the socket.

The gaspipe h, which carries the bracket, is preferably provided with an insulating joint, c', of the usual construction. Upon the end of the pipe which protrudes beyond the ornamental cap k is screwed the block Z,whicli has the gasway m through it, and has at its outer end the aperture n, in which the gas-plug 0 is inserted, being held by the screwp and y washer r, so as to turn in the aperture. From the block s, below the gas-plug, extends the first arm, c, of the jointed gas-tube.

The turning block s has the screw t entering its lower end, which screw carries the twopart shell u u', the upper half, u, of which is stationary, the screw turning through it,while the lower half, u', turns with the screw. In an aperture in u is inserted the outer end of inclosing-tube b, whose inner end enters the cap k, where the protruding conductors are suitably connected with the housewires. From u extends the tube b', and the flexible conductors e e extend continuously through the joint, as shown. The upper portion of screw t is whiteleaded to make a gas-tight joint, or the gasway need not extend through The meeting surfaces of u and u are flat surfaces, the connection being, therefore, a loose one, such as to permitaslight oscillation between these parts to compensate for inaccuracies in construction, which might prevent the two arms from turning evenly. The arms c and b are swung simultaneously, turning on the same center, the block s, screw t, and lower half, a', of the cap being turned, while u is stationary. A similar joint to that just described is made at c in the double bracket, Fig. 2.

The inner end of the wire-inclosing arm is preferably supported by the downwardly-cxtending support c, through the lower end of which the tube passes, being held by set-screw w, whereby the part b is held rigidly stationary. rIhe two arms may be' further connected together by suitable clamps, y, each of which is made in two parts united by a screw, z.

It will be seen that by the above construction I have produced a simple and cheap fixture, and one whose part-s are readily separated and replaced when necessary, in which the conductors are inclosed and protected,

while not exposed to contact with the gas.

What I claim is- 5 1. In a combined gas and electric-light fixture, the combination, with the turning block at the joint of a swinging gas-arm, of the screw extending below the same, the two-part shell carried by said screw, and the two hollo low electric-light arms, one entering each half of said shell, substantially7 as set forth. 2. In a combined gas and electric-light fixture, the combination of a jointed gas-arm having tight gas-conveying),` joints and another t5 jointed arm inclosing electrical conductors,

the joints of the latter arm being loosely connected, and the two arms being mechanically

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