US443562A - Sigmund bergmans - Google Patents

Description

(No Model.)

s. BERGMANNQ INGANDESOENT'LAMP SOCKET.

No. 443,562. Patented Dec. 30, 1890.

Fig. 2.

INVENTOR Z0636 (777M701,

Sign

BY 2 i H/J ATTORNEYS WITN SSESI' UNITED STATES PATENT OFFICE.

SIGMUND BERGMANN, OF NEXV YORK, N. Y.

INCANDESCENT-LAMP SOCKET.

SPECIFICATION forming part of Letters Patent No. 443,562, dated December 30, 1890.

Application filed January 10,1890. Serial No. 336,523. (No model) To all whom it may concern.-

Be it known that I, SIGMUND BERGMANN, a citizen of the United States, residing at New York, county and State of New York, have invented a certain new and useful Improvement in Sockets for Incandescent Electric Lamps, of which the following is a'specification.

The invention consists in the construction and novel arrangementof parts, as hereinafter set forth; and the object is to provide a socket of simple construction and wherein the circuit-wires will not be twisted or abraded by the outer shell.

111 the accompanying drawings, Figure 1 is a vertical section of the socket as applied to a lamp-chamber. Fig. 2isa front View of the socket with a portion broken away and the outer shell removed. Fig. 3 is a plan of the interior of the socket, and Fig. 4 is a front View, partly in section, with the outer shell removed. Fig. 5 is a perspective view of a portion of the cut-out.

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

Referring by letter to the drawings, A designates an incandescent-lamp chamber having the ordinary metallic tip-piece a in connection with the filament.

B designates the metal socket, consisting of the inner shell (1, the outer shell or, and the top or cap a The cap a has a central opening through it, threaded to engage a bracket, and through which the circuit-wires pass. The inner surface of the cap a is provided with a disk I) of insulating material, such as rubber or analogous material, and the outer shell a has a bushing b of insulating material, such as rubber or analogous material, rigidly fastened within it, so that there can be no electrical contact between the cap and outer shell and the inner shell. The inner shell a is threaded to engage the tip of the lamp-chamber. The upper end of the inner shell is turned inwardly to form a flange, and a block b of insulating material, such as rubber or analogous material, is fitted within the upper end of the shell against the flange, so that when the block b is secured to the disk I) by means of screws the flange will be clamped firmly between the block and disk,

thus holding the shellin place. The block b has a perforation for the passage of circuitwires in line with the perforation through the cap-piece, and has opposite side notches for the accommodation of the binding-screws c c. Opposite the notches in the block b the shell (t has wide openings, so that the proper connections may be easily made with the binding-screws c 0 when the outer shell is re moved. An integral tongue 0 extends from the shell a below and independent of the flange and connects with the binding-screw 0, thus making the shell a one pole or contact, and a contact-piece c engages with the binding-screw c. This contact-piece c is preferably of resilient metal and has one end bent inwardly below the block 17 contacting with the tip a of the lamp. By providing the integral tongue 0 in contact with a bindingscrew I simplify the construction by doing away with the extra thick piece of metal or dinarily used for that purpose. The outer shell 0. is secured in place by means of screws d passing through it into the block 12 the opening through the shell afor the passage of the screws being enlarged, so that the screws will not contact with the shell.

By securing the outer shell as described there is no danger of its coming loose, as is liable when the shell is secured by means of a hard-rubber ring engaging with the thread of the inner shell. Such rubber rings are also objectionable, inasmuch as such rings are sometimes burned or scorched, giving forth a bad odor.

The socket described herein may be made very much smaller in its outward dimensions than those heretofore made for the same size of lamp.

Having described my invention, what I claim is 1. In a socket for incandescent lamps, the combination of an outer shell, a bushing of insulating material rigidly secured in the shell, a cap having a central threaded opening, a disk of insulating material on the inner face of the cap, the inner shell having an inwardly-turned flange, ablock of insulating material within the shell fitted against the flange, means, substantially such as described, for securing the block, binding-screws on the insnlatingbloclc, a tongue integral with the inner shell, independent of the flange, and extended to abinding-screw on the block, and a resilient contact-piece engaging with another an integral tongue extending from the inner 5 binding-screw on the block, substantially as 'shell,independent of the flange, to abindingl turned flange and the wide side openings, at

specified; screw, and a resilient contact-piece extending block of insulating material having opposite notches, binding-screws Within said notches, I5

2. In a socket, the combination of an enter from the other binding-screw, substantially shell, a bushing of insulating material rigidly as specified.

secured in the shell and extending its entire [0 length, a cap having a central opening, a disk of insulating material on the inner face of the cap, the inner shell having the inwardly- IGMUND BERGMAYN.

Witnesses:

IIULBERT PECK, l. U. KLEIN, Jr.

Images