US1017260A - Electric-lamp socket. - Google Patents

Description

J". H. GOBHST. ELECTRIC LAMP socK'ET.

APPLIGATION FILED NOV. 7, 1910.

, Patented Feb. 13,1912.

2 SHEETS-SHEET 1.

J. H. GOBHS'T.

ELECTRIC LAMP SOCKET.

APPLICATION FILED NOV. '7, 1910.

1,017,260. Patented Feb. 13, 1912.

2 SHEETS-SHEET 2.

UNITED dTATES PATENT OFFICE.

JOHN H. GOEHST, OF CHICAGO, ILLINOIS, ASSIGNOR TO FEDERAL ELECTRIC COMPANY, OF CHICAGO. ILLINOIS, A CORPORATION OF ILLINOIS.

ELECTRIC-LAMP SOCKET.

Specification of Letters Patent.

Patented Feb. 13, 1912.

Applicatioirfiled November 7, 1910. Serial No. 591,009.

reference marked thereor u hich term a part of this s )ecitication.

This inventionrelates to an improvement in electric light sockets, and the object of the invention is to provide a water-proof socket of simple and economical construction, and one which may be readily and quickly attached to a supporting arm without twisting the conductor wires and with out any danger of damaging the binding posts when securing the parts in place.

The invention consists of the matters hereinafter described and more particularly pointed out in the appended claims.

In the drawings :-ligure 1.is a side cle vation of my improved socket shown attached to supporting arm. eig. 2 a bottom plan View of the same. Fig. is a vertical scctionaL view through the socket and the lower end of its supporting arm on the line 33 of Fig. 2. Fig. l is a vertical sectional vicwon the line {i to'l Fig. 2. Fig. is a transverse section through Fig. 1 on the line thereof. Fig. 6 is a top plan view of the upper insulation block of the socket. Fig. 7 is a vertical section through Fig. 6 on-the line 77 thereof. Fig. 8 is a sectional side elevation showing a shade at tached to my socket.

In that embodiment of my invention illustrated in the drawings, 10 indicates the pipe which comprises the supporting arm for the socket and through which the conductor wires are led to the socket.

11 indicates the socket as a whole. socket embraces a terminal and contact supporting insulating block 12, an insulating tubular block 13 which incloses the threaded contact shell, and a. metallic shell member 1% by means of which the two insulating blocks 12 and 13 are secured together, and which serves as the means for attaching the socket to the threaded end of the pipe 10. The block 12 made of porcelain or other I suitable insulating material and comprises The an annular base 12 provided on its lower face with a central boss 12 to which are secured, in any usual or convenient manner, a. shell contact 15 and a central contact 16. The upper edge 12 of said disk is preferably rounded in cross-section, and is provided with a plurality of radially disposed notches 12. The metallic shell 14 has a dome-shaped body 14L formed to provide a chamber to receive the base 12 of the insulating block 12, and is indented to form rounded shoulders 14: on its inner surface which are adapted to engage within'the notches 12 of said block. Above said domeshaped body the shell member 14 is provided with a tubular extension 14L Within which secured an internally threaded, reinforcing ring let, adapt-ed to be screwed upon the threaded end 10 of the pipe 10. As shown in the drawings, said ring 1 1 has an annular groove 14 formed in its outer surface and the wall of the tubular exten sion is spun into said groove to secure the parts together.

T he upper end of the tubular insulating block 13 engages against the margin of the lower face of the base 12 of the block 12, and has an external screw-thread 13* which engages with an internal thread 14 formed in the shell member 14. The upper end of said tubular block 13 is recessed as indicated at 13" torccoive the boss 12 of the block 12.

Said recess terminates in an annular shoulder 13 on the inner surface of the tubular block, which shoulder abuts against the lower face of said boss 12*.

In the top of the block 12 is formed a recess 12 and communicating with said recess at each end are apertures 12, 12 ex tending through the block for the passage of line wires, 17, 181, which are connected to oppositely disposed binding screws 17, 18 screwed transvei'scly into the boss 12? which is cut away at the points where said binding screws are attached so that said screws will be located well within the recess 13* of the tubular block 13 without danger of contact between said screws and block.

The manner of assembling the sockets is as follows: Theshell 14 is first screwed upon the threaded end of the arm 10. The wires" 17, 18 are then drawn down and inserted through the apertures 12, 12 of the insulating block 12 and connected to the screws 17, 18 The block 12 is then pushed up into the shell member 14, and is shifted or turned slightly in order to engage the notches 12 with the shoulders let formed on the inner surface of said shell. The tubular block 13 is then screwed into the threaded end of the shell member 14, until it engages with the block 12 in the manner described.

It will be noted that in this socket in assembling it and in attaching it in place, there is no twisting of the wires, and the binding screws and parts are so arranged that in screwing the parts together no moving part is caused to rub aga nst said binding screws.

In Fig. 8 is illustrated an improved shade holder particularly adapted for use with my improved socket. 25 indicates the shade holder and 26 the shade or globe supported thereby The shade holder 25 has a depending flange 25 carrying the usual set screws 25* which engage within the usual annular groove 26 formed at the top of the shade 26. Said shade holder also has a central tubular extension 25 which has an internal thread 25 The shell let of the socket has an external thread 143 adapted to be engaged by the thread 25 of the shade holder. The shade holder may thus be screwed upon the socket. This construction furnishes a simple and economical construction for attaching the shade since, by reason of the thinness of the shell 14, the internal thread 14 and the external thread 14' may be readily formed by the same operation.

I claim as my invention 1. A socket embracing a hollow shell member adapted to be attached to a support and provided with an internal thread at its lower end, an insulating bloc-l: adapted to fit within said shell member and to which are secured a center contact and a shell contact together with their associated binding posts, said insulating block having apertures for the passage of the conductor wires, said shell member and insulating block be ing provided with engaging parts adapted to prevent rotation of said block with retcrence to said shell member, and a tubular insulating block surrounding said contacts and said binding posts and adapted to engage at its upper end against said insulating block, said tubular block being provided with an external thread adapted to engage withcthe internal thread of said-shell memher.

2. A socket embracing a hollowshell member having a dome shaped body pro vided at its lower end with an internal screw-thread and having a tubular inter nallv threaded extension at its top, an insulating block adapted to fit within said dome-shaped body of the shell member and provided with apertures for the line wires, said insulating block and shell mrnnberbcing provided with engaging parts adapted. to prevent the block from rotating with reference to the sliellunember, said block be ing provided with a central boss to which are secured a center contact and a shell con tact and their associated binding posts, and a tubular insulating block surrounding said contacts and binding posts and engaging at its upper end against the lower face'of said insulating block, said tubular block being provided with an external thread adapted to engage with the internal thread. at the lower end of said shell member.

A socket embracinga hollow shell mem her having a domeshaped body provided at its lower end with an internal screw-thread and having a tubular extension at its top,

an internally threaded, reinforcing ring secured within. said tubular extension, an insulating block embracing a base conformed to fit within the dome-shaped body of said shell member, and a central boss, said in sulating block and said shell member having engaging parts adapted to prevent the rotation of one with reference to the other, said boss being cut away at its opposite sides and said insulating block being provided with oppositely disposed apertures for the conductor wires, a center contact: and a shell contact secured to said boss, associated bindins; posts secured to said insulating block adjacent said apertures at the points where said boss is cut away, and a tubular insulat lug block recessed at its upper end to receive said boss and engaging at its upper end against said insulating block, said tubular block being provided with a thread adapted to engage with the internal thread at the lower end of said shell. member.

4:. A socket embracing a hollow shell member adapted to be attached to a support and provided with an internal and external thread at its lower end, an insulating block adapted. to fit within said shell member and to which is secured a center contactand a shell contact, together with their associated binding posts, said insulating block having apertures for the passage pt the conductor wires, said shell member and insulating block being provided with engaging parts adapted to prevent rotation of said block with reference to said shell member, and a tubular insulating block surrounding said contacts and said binding posts and adapted to engage at its upper end against said insulat ing block, sa1d tubular block being pro vided with an external thread adapted to engage with the internal thread of said shell member.

5. A. socket embracing a hollow shell member adapted to be attached to a support atits upper end, an insulating block adapted to lit within said shell member and to which is secured a center contact and a shell contact, together with their associated binding posts, said insulating block having block adapted to engage the lower end of apertures for the passage of the conductor said shell member. I

wires, said shell member and insulating In testimony, that I, claim the foregoing block being provided wit-h means adapted as my invention 1 atfix my signature in the 5 ,to prevent rotation of said block with refpresence of two witnesses, this 24th day of 15 erence to said shell member, and a tubular October A. D. 1910.

insulating block surrounding said contacts JOHN H. GOEHST; and said binding posts adapted to engage Witnesses: at its upper I end against said insulating GEORGE R. WILKINS,

1?; block, and means provided onsaid tubular T. H. ALFREDS.

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