US2261170A - Electrical contact socket - Google Patents

Description

Nov. 4, 1941. v vc. F. MacCART HY 7 2,261,170

ELECTRICAL CONTACT SOCKET I f Filed April 26 1940 INVENTOR.

ATTORNEY.

. Patented Nov. 4, 1941 OFFICE 2,261,170 ELECTRICAL coN'rAc'r socxn'r Charles F. MacCarthy. Salem, Masa, assignor to Hygrade Sylvania Corporation,

V Massachusetts a corporation Application April 26, 1940, Serial No. 331,193 (01.113-328) 3 Claims.

This invention relates to a socket for an electrical device having a base with two contact pins extending the efrom used in the starting apparatill]: oi electriczgaseous discharge lamps, and the l e.

An object of the invention is to provide a socket which gives a distinctly positive action.

Another object is the securing of abroad contact surfaces A further object is the centering in the socket of the base of an electrical device so that the rotating axis of the base of an electrical device is concentric with the insulating material. The structure of the socket is such that it is much easier to manufacture, than prior sockets.

The socket comprises four pieces of insulating material, for example fiber, joined together by eyelets, rivets, or some similar means, two pieces of resilient wires, two pigtails and such other materials as are enumerated in the specifications, taken in conjunction with the drawing in which: I

Figure 1 is a top view of the second layer. Figure 2 is a top view of the third layer. Figure 3 is a top view of the top layer. Figure 4 is a side view been assembled.

Figure 5 is a top view of the bottom layer. In Figure 1, the insulating material, for example fiber is stamped or punched in such a I2 and. I3 by soldering, welding, or some similar bonding method.

The contour of the resilient wires l2 and I3 is such that the wires provides. positive locking device when they are recessed in the cut-outs 21 and 28. The cut-outs 21 and 28 herein described are so formed as to provide for enough expansion on the part of the wires l2 and I3 to allow for the insertion therebetween of the contact pins of the base of an electrical device and for the movement of these pins into their locking positions. On the other hand, the cut-outs are not so large that they will obviate the securing of a positive locking action after the base of an electrical device has been rotated to the desired position.

In Figure- 2, when the contact pins of the socketare inserted in the cutouts 21 and 28,

of the socket after it has a manner as to provide the holes 2, 3, I, and 5 and the cut- outs 6 and 1. These cut-outs and holes are so shaped thatwhen the insulating material of fiber herein described is superimposed on the insulating material described in Figure 2. the holes 2, 3, 4 and 5 in Figure 1 will coincide with similar holes 20, 2|, 22, 23 described in Figure 2' and the cut- outs 6 and 1 herein described will be over the cut-outs 21 and 28 described in Figure 2. v

In Figure 2, the insulating material, for example fiber, 26, is stamped or punched in such a manner as to provide the holes 20, 2|, 22, and 23 and the cut- outs 21 and 28, and 28 and 88. These cut-outs and holes are so shaped that when the insulating'material or fiber described in Figure I is superimposed thereon, the holes 20, 2|, 22 and 23 described herein will coincide with similar holes described in Figure 1 and the-cutouts2l and 28in Figure 2 will be directly beneath similar cut-outs described in Figure 1. Cut-outs 29 and 30 are so inserted as toprovide outlets for connection purposes for the pigtails they are inserted so as to assume the positions It and 5 and when rotated in a clock-wise manner, they will exert a pressure on the resilient wires l2 and I 3 and pass into the locking positions I6 and I1,, A large contact surface, a desirable feature in a device of this nature, is secured by-reason of the fact that a firm contact is nade on twosides of each switch contactpoint.

Figure 3 is a view of the top layerof insulating material or fiber, 3|, in which the holes 32, 33, 34, and 35 are so located as to coincide with similar holes described in Figures 1 and 2 when the layer in Figure 3 is superimposed on the layers described in Figures 1 and 2. The cut-out, 36, is located in a position where it will be directly over the cut-outs 6 and I and 21 and 28 in Figures 1 and '2 respectively and is of a sizeadequate to receive therein the base of the electrical device. Thus this cut-out provides for the centering of the base of an electrical device so that its rotating axis .is concentric with the fibers, thus causing both contacts on the base of the electrical device to enter both socket contacts at the same time.

Figure 5 is aview-of the bottom layer of insulating material or fiber, in which the holes 31, 38, 39 and are so inserted as to coincide with similar holes described in Figures 1, 2, and 3 when the layers described in said figures are superimposed on the layer 4| in Figure 5.

Figure 4 is a side view of the socket in its finished form, 1. e., after the four layers of insulating material shown in the accompanying drawing have been superimposed on each other in the manner above described. The pigtails l0 and 2 -a,2o 1,17o

l I are shown in their extension from the middle pair of resilient contactwlres set in the cut-outs oi the layers of insulating material. of the third lamination, a pair of pigtails ex- Screws are inserted in the holes I and 5 and tending from said contact wires and a bottom corresponding holes described in the above iiglamination acting as a base plate, ures, as a means of securing the socket in a fixed 5 2. The combination of claim 1 in which the position. Eyelets or rivets 42 may be inserted contour of the contact wires is such that it prothrough the holes 2 and 3 and corresponding vldes two distinct contact smiacm for each conholes as described in the above figures as a means tact pin.

of fastening together the four layers of insulat- 3. A socket for an electrical device having a ing material. 10 base with two contact pins extending thereirom, WhatI claim is: said socket comprising: at least three joined 1. A socket for an electrical device having a laminations of insulating material, one laminabase with two contact pins extending therefrom, tion having two elongated arcuate cut-outs said socket comprising four joined laminations therein for the insertion and rotation thereof insulating material, the top-lamination hav- 15 through of the contact pins 01 the electrical ing a cut-out therein for the insertion theredevice; another lamination having two elongated through of the base of the electrical device, the arcuate cut-outs therein in register with the v second lamination having two elongated arcut-outs in the first mentioned lamination; a

cuate cut-outstherein for the insertion and ropair of resilient contacts set in the cut-outs of tation therethrough of the contact pins of the 29 the last-mentioned laminatio a pair of pigelectrical device, the third lamination having two tails extending irom said contacts, and a bottom elongated arcuate cut-outs therein in register lamination acting as a base plate.

with the cut-outs in the second lamination, a CHARLES F. MacCARTHY..

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