US2190403A

US2190403A - Bayonet type lamp socket

Info

Publication number: US2190403A
Application number: US198995A
Authority: US
Inventors: Albert J Foute
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-03-30
Filing date: 1938-03-30
Publication date: 1940-02-13
Anticipated expiration: 1957-02-13

Description

Feb. 13, 1940 A J, FQUTE 2,190,403

. BAYONET TYPE LAMP SOCKET Filed March 50, 1938 IVENTOR.

ATTOR Y Patented Feb. 13,"

w I 2,190,403 BAIVIZONETITYIPE LAMP socKE'r I I I I Albert J. Foute, Chicago, Ill.

I I f-Applic'ation March 30,; 1938, Serial No. 198,995 1 dclaiins. (Oriya- 328); w

This invention. relates to lamp sockets of the bayonet typeand it consists. in the constructions,, arrangements, and combinations herein described and claimed.

It is the cardinalpurpose of the invention to socket and bracket from a provide a combined single sheet of metal.

It is also an important object of the invention to provide a socket having the characteristic that when a bulb is inserted therein, the resil- I ience of a portion of the metal of the shell is tenthe bulb. j I1 I I I It is a still further object of. the invention to. provide a combined socket and bracket of ex-. treme simplicity, whichmay be manufactured ata low cost and which will be durable in use.

I Figure 2.

sioned, effecting a firm electrical contact with 3 Figure '4 is a plan view of the blankfor the socket and bracket.

Figure is a cross section through-the center;

contact of the socket. I

i There is illustrated aisocket generally indicated at Ill, which as maybe seen in Figure 4, is formed from a single blank of metal I l, comprising portiOllS l2, l3, l4, I5, l6, and H. w

The portions I2 and 14, are bent into cylindrical formation of a size to snugly receive the a base portion of a light bulb, and the portion I3 is outwardly pressed to form a channel I8, the

channel extending longitudinally of the socket I0. Medially of the portion of the blank a bayonet slot I9 is 'formed, one terminal 20of which opens upon the channel l8.

It'should be noted that the upper part or the I portionl2 has its vertical edge 2 I I spaced inwardly of the edge 2| 'andwhen the blank is shaped, the edges. 2I-'-2|' stop short ofthe portion [4 of the blank,.thus providing an entrance slot 22; and by reason of the fact that theedgezl' extends beyond the edge 2|, the former will project somewhat intothe slot 22, and act to shunt a pin 01 the lamp base into the open-ended bayo- 1 net slot 23, as will be understood, as the description proceeds.

The portions .15 and "5 of the blank are bent orbus bar 25.

into the form of a clip and this is accomplished by bending'th'e portion l5 into a loop 24, and I bending the portion l6 into a slight are so as to lie closely spaced to the portion I4. ,24 provides resilience to the'portion l6, permit- 5 ting it to be sprung as indicated by dotted lines The loop in Figure: 2, allowing the entrance of a support In order to provide a central contact for the socket, the lower edge 26 of the portion [4 has in- 0 tegrally connected therewith the disk-like member 11. The disk member I will be bent on the line 21 to suchdegree that it lies in-a' plane up wardlyinclined with respect'to the edge 26. The disk is centrally apertured as at 28, and seated 15 therein is -aninsulator bushing 29, secured-by a c metallic eyelet 30, the upper fiange of which .afiords electrical connection with central contact of a bulb and the lower flange providing connection fora current supply line 3|.

t I As will be seen from Figure 2, the channel [8 I and the slot 22 are positioned diametrically opposite one another so as to receive respective pins 32 of a lamp base 33, and in applying a bulb to the socket, the pins 32 of the base are presented into the channel l8, andslot 22, and forced-inwardly toward the disk member IT. This movement is continueduntil the pin "in the slot 22 encounters the edge 2| when further downward I and slight rotative movement of the bulb will so I; c'ause the pins to enter the bayonet slots l9 and 20. The base contact of the bulb now presses up onthe upwardly inclined disk member ll, forcing it to assume a right angular relation with' regard to the "socket, thereby tending to expand the shell out of its normal position until the bulb is seated within the socket. As soon as the bulb is fully seated, the shell will contract,tending to assume its normal position, to gripthe base of the bulb. It will beunderstoodthat the-disk 40 member I'l' assumes as ubstantially horizontal I position, and, thus, theshell is tensioned circumferentially to grip the bulb. It will thus be seen that the disk and shell firmly grip the bulb establishinga proper electrical contact. I 1 4 While I have shown and described a preferred construction, this is byway of illustration only,

and I considerras my own all such modifications in'structure as fairly fall within the scope of the appended claims.

I claim:

. I ,50 1,. An electric socket comprising a cylindrical shell having a freelongitudinal edge, a disk-like member atone end and integral with the shell,

I said disc-like member having a contact, said-discv with respect to the adjacent edge of the shell,

said shell having slots for reception of pins of af like member normally extended in an upwardly inclined plane with respect to the adjacent edge of the shell and said shell having slots for reception of pins of a lamp bulb base for securement of the lamp bulb therein.

2. An electric socket comprising a cylindrical.

shell having separable longitudinal edges, adisclike member integrally connected: with a'horlzontal edge of the shell andhaving a centrally disposed. contact member, the disc-like member normally extended in an upwardly inclined plane lamp bulb base for securement of the lamp bulb therein, said slots being positioned so as to move said disc-like member to approximately horizontal position and tension, said shell upon enan electrical contact, said discimember'being integrally connected with a horizontal edge-of the shell and disposed centrally thereof, the disc- "like member normally extending-in an inclined 2,190,403 1 i plane with respect "to; the adjoined edge ofthe shell, whereby said.=-disc-like member will. be

sprung to a substantially horizontal position by, engagement of the base contact of a bulb with the of the disc-like member, with consequent;

contact circumferential flexing of the walls of the shell. 4. An electric socket andbracket formed from a single blanket resilient metal comprising a cy- 1 lindrical shell having adjacent separable longi-Z tu dinal yedges one" oi -the said edges havinga bayonet slot openingv thereupon, a longitudinally extended channel formed'in the "shell, a second bayonet slot in the shell in opposed relation to the first namedbayonet slot, said second named 3 i slotopening upon the channel, a disc-like memberintegrally connected'with the horizontal lower j edge of the shell and having an electrical contact and the other edge of the shell being reversely bent upon itself and closelyspaced to the body of theshell. Y 1

ALBERT J; Fo-UTE.

f disposed centrally thereof; the disc-like member j i normally extended in an upwardlyinclin'ed'plane f with respectto the adjoined edge of the shell,