US1954497A - Lamp socket - Google Patents

Description

E. E. SLICK LAMP SOCKET April 10, 1934.

Original Filed Nov. 28, 1925 Patented Apr. 10, 1934 UNITED STATES PATENT OFFICE LALIP SOCKET Edwin E. Slick, Pittsburgh, Pa.

1 Claim.

The present invention relates to lamp sockets and the process of manufacture. This application is a division of my co-pending application Serial No. 71,921, filed' November 28, 1925, upon which Patent No. 1,717,525 was granted June 18,

The object of the invention is to simplify and cheapen the cost of lamp sockets of this character and particularly the electric connections. With this object in view, the invention consists in the combinations and arrangements of parts as hereinafter described and more particularly pointed out, the advantages of which will be apparent to those skilled in the art from the following description.

In the drawing:-

Figure 1 is a central vertical section through a lamp embodying my invention,

Figure 2 is a perspective view showing the insertable electric connection, and

Figure 3 is a view similar to Figure 2, but showing a modification.

Referring to the embodiment of the invention illustrated in the drawing, the lamp consists of two glass parts, a base 1 and a shade 2. The base 1 consists of a pedestal portion 3 and a flange 4 formed integral therewith. The flange 4 extends outwardly from around the electric lamp socket 5. The edge of the flange is provided with three lugs 6 which engage the shoulder 7 of the shade 2 so as to leave air ventilating spaces 8 between the shade 2 and the supporting flange 4.

The shade and the base and more especially the flange 4 are made of translucent glass. The shade and base are preferably finished with an etched or sand blasted surface on the outside, and may bear other decorations if desired.

The electric lamp socket 5 consists of a threaded metal shell 9 into which the electric lamp 10 is screwed. The lower end of the shell has an inwardly extending flange 11 through which is formed a relatively large hole 12. The shell 9 is preferably secured in the base by casting it into the glass during the molding operation of the base, although it may be otherwise secured as by cement. The electrical connections are thereafter inserted. These connections are shown in Figure 2 and a modification in Figure 3. The connections consist of an insulating disc 13 hav- 5O ing a central lamp engaging contact 14 to which is soldered one of the leading in wires 15. The connection is made from the other leading in wire to the shell 9 by means of a conducting ring 17 to which the leading in wire 16 is soldered as shown in Figure 2. The ring 17 lies in contact with the flange 11 and is supported thereby. The ring 17 is preferably formed with a U-shaped cross section as shown in Figures 1 and 2, so as to be burnished around the edge of the insulating disc 13. The ring 17 may, however, be made as (39 a plain flat ring as indicated at 17a in Figure 3,

so as to lie between the insulating disc 13 and the flange 11.

In assembling the lamp, the electric wires 15 and 16, which are preferably bound together in a lamp cord 18, are inserted through the shell 19 and the insulating disc and conducting ring 17 are drawn into place as shown in Figure 1. The form of socket and its electric connections not only allows it to be used where the socket is to be cast in, but is a very cheap construction to make. The electric lamp socket, while designed particularly for use in lamps of this character in which the shell is cast in with the glass during the pressing operation, may have other applications.

The lamp is formed with a tapered recess or depression below the open end of the socket shell 9, the recess tapering from a, diameter approximately equal to that of the hole 12 through the bottom of the shell 9 to a smaller diameter at so the neck 20. This enlarged recess 19 allows sufiicient room for the wires which separate and extend to the conducting terminal through the insulating disc and to the contact ring 17. The pedestal of the lamp is hollow and has the opening 21 which extends to the recess 19, and allows the passage of the lamp cord 18 through the base of the lamp. The bottom of the lamp is preferably formed with short lugs 22 which provide clearance spaces 23 for the emergence of the lamp cord 18.

While I have specifically described and illustrated the preferred embodiment of my invention, it is to be understood that the invention is not limited to its illustrated embodiment, but may be otherwise embodied within the scope of the following claim.

I claim:

An electric lamp socket comprising a metallic shell having an inwardlyextending flange, a conducting ring of U-shaped cross-section seated against and supported by the flange and adapted to receive a conducting wire, and a plate of insulating material placed within said ring and having a lamp contact adapted to receive another conducting wire.

EDWIN E. SLICK.

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