US1332867A - Electric-lamp socket - Google Patents

Description

G. FRANKEL. ELECTRIC LAMP SOCKET. LiCATlON FILED J Patented Mar. 2,'1920. I 'le l ll 75m/ WITNESSES d M IMENTOR GUSTAVE FRANKEL, OF NEW YORK, N. Y.

ELECTRIC-LAMP SOCKET.

Specication of'Letters Patent.

Patented Mar. 2, 1920.

Application led January 13, 1919. Serial No. 270,814.

.To all ifi/Lona.. t may comic/rn.'

lie it known that I, GUsTAvE FRANKEL, a citizen ot the United States, residing at New York, in the county of New York and State of New York, have invented certain new andusciul Improven'ients in Electric-Lamp Sockets, ot which the following is a specification. l

My invention relates to a double socket, ot the kind that are inserted into a suitable elect-ric light fixture and furnish two conncctions or two sources of current. y

p Devices of this character are used in great quantities when it is desired to draw a current lor a table lamp as well as 'for an ,ordinary electric light trom a single socket, and for a variety of other purposes, and numerous structures have been proposed for this purpose.

The object of my invention is to produce a double socket of great simplicity and cheapness that can be'qniekly manufactured and assembled and shall be very reliable in preventing cross-circuits, short circuits, and the like.

Other objects of my invention will` be set forth in the `followingr description and drawings which illustrate a preferred embodiment thereof. c

Figure 1 is an elevation view partially in section of my proposed device, and is a seetion on theline 1-1 of Fig. 2.

Fig. 2 is a section on the line 2-2 of Fig.

'1, vpart of it being in perspective.

Fig. 3 is a section on the line 3-3 of Fig. 1.

All et the sections are in the directions of the arrows on the respective lines on which the)r were taken.

The socket is made of two similar halves 1 and 2 which are pressed out of some suitable composition which is made of an insulating material, and it is preferably a poor conductor of heat. Numerous compositions ont of which the parts l and 2 can be molded or cast in suitable dies, 0r by other methods. are old and well-known in the art, so that they require no specific mention,l as my invention is neither directed nor limited 'to any specific composition. The sections or halves 1 and 2 are connected by fa bolt 3, whose head /lis countersunk in a suitable recess in section 1. and whose nut 5 is` countei-sunkA in a like recess. Each of the sections 1 and 2 has a recess (3 iornied therein, so that when they are fitted and firmly pressed the parts mains and together by means of the bolt 3, a cavity is formed in the assembled structure.

As seen in Fig. 1, the sections .carry a projecting bridge 7 of similar insulating material, which coperateswith the correspendingrecesses 'in the sections so that can be accurately fitted together along the ,line of division 8. Into this bridge 7, pins 9 are secured. during its molding or shaping, so'that they project into the socket portions 10 and 11. These socket portions 10 bayonet recesses l2, for coperation with the head of an ordinary bulb 14, provided with projections that tit into the bayonet and 1l are provided with lateral sockets 12, and that form electrical connecfv tion with the pins 9, the bulb 14 being held in `the socket construction.

The pins 9 are connected in pairs bythe ,wires 15, which are laid in ,gfroovesinv the recess so that as seen in Fig. 2, the Wires 1G which may contact with the metal termi# nals 17,' do not contact with wires 15, and are reliably held against-forming cross cir-1 cuits.- The head of the ixtnre is provided with pins 20, for the insertlon intoa suitable bayonet socket into the'electric light fixture from which the current is drawn. It desired, the head 21 rof the fixture, which may be called the main head portion of the device, may be made of metal in the usualnianner. The current isV drawn from the divides into two circuits by the connections shown to the two sockets 10 and 11, so that two bulbs may secure power from a single fixture.

by the well-known bayonet.

spo

As seen in Fig. 8, the sections 1 and 2 are recessed along their line of union 8 so as to hold the wires 16 permanently in proper position. The wires 16 may be soldered or fastened in any convenient manner to the terminal' 17. l

4 ln this preferred embodiment of my invention, the entire structure consists of three parts which can be very readily assembled.

and in which the parts are prevented .from any movement relative to each other.

The wires 15 and 16 may be covered with insulating material if desired.

It is obvious that if desired, the bridge 7 could be permanently connected to either of the sections 1 and 2 or made integral With either of them, and that other omissions and changes of parts can be made without de parting from the spirit of my invention.

I claim l. In combination, a double socket comprising two like halves, each or' these halves including a main head portion and branch socket portions, so that when the said halves are joined together, they form a main head adapted to be connected to a source of electricity and branch sockets adapted to be connected through the said main head 'to the said source, means for connecting the said halves together, and a bridge made of moldable insulating material intermediate and held by the said halves when they are connected, thesaid bridge carrying electrical means for leading current trom the said source through the said main head to the said branch, sockets.

2. In combination, a double socket having two like halves, each ot said halves comprising branch socket port-ions made of insulating material, the said halves being connected by a main head made of metal, a bridge of insulating material intermediate and held by" the said halves when they are connected, means tor connecting the said halves together, the said main head portions -being provided with metal pins, so that the main head can be inserted into a1 bayonet socket, metal terminals secured at the interior of the Vsaid main head and projecting metal pins carried by the said bridge and projecting in pairs into the said branch sockets, the said projecting metal pins being connected to the said terminals ot the main head so as to be adapted to make a complete circuit whcn they are electrically connected, the said branch sockets being provided with recesses'so that a bayonet head may be secured therein and contact with the said projecting metal pins.

.3. In combination, a double socket having two like halves, each of said halves comprising branch socket portions made of insulating material, the said halves being connected by a main head made of metal, a bridge ot insulating material intermediate and held by the said halves when they are connected, means for connecting the said halves together,v the said main head portions being provided with metal pins, so that the main head can be inserted into a bayonet socket, metal terminals secured to the interior of the said main head and projecting metal pins carried by the said bridge and projecting` in pairs into the said branch sockets, the said projecting` metal pins being connected to the said terminals of the main head so as to be adapted to make a complete circnit when they are electrically connected, the said branch sockets being provided with recesses so that a bayonet head may be secured therein and contact with the said projecting metal pins, the part of said bridge intermediate the said socket portions being at right angles to the line of division between the said halves, and the other parts ot the said bridge being inclined te the said line of division.

41 In combination, a double socket having two like halves, each. of said halves comprising branch socket portions made of insulat` ing material, the said halves being connected by a main head of metal, and a separate bridge made ot insulating material and adapted to be placed intermediate and to be held by the said halves when they are connected,`and means for connecting the said halves together, the said bridge having electrical connecting means adapted to place the said main head portion in electrical communication with the said branch sockets when the structure is assembled.

In testimony whereof I hereunto aiiix my signature.

' GUSTAVE FRANKEL.

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