US941811A

US941811A - Keyless socket.

Info

Publication number: US941811A
Application number: US45905808A
Authority: US
Inventors: Clarence D Platt
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-10-22
Filing date: 1908-10-22
Publication date: 1909-11-30
Anticipated expiration: 1926-11-30

Description

C. D. PLATT.

KEYLESS SOCKET.

APPLICATION FILED OGT.22,1908.

Patented Nov. 30, 1909.

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UNITED STAT ESP1 X IENT OFFICE.

CLARENCE D. PLATT, 0F BRIDGEPORT, CONNECTICUT.

KEYLESS SOCKET.

airs-11.

[u all whom "it may concern:

Be it known that I, CLARENCE D. PLATT, a;citizen of the United States, residing at Bridgeport, county of Fail-field, State of Connecticut, have invented a new and useful Keyless Socket, of which the following is a specification.

This invention relates to the class of electrical sockets known to the trade as keyless sockets, that is sockets in which no switch mechanism is embodied in the structure, the current throu h the lamp being controlled by a group switch, and the invention has for its objects ,to improve the details of cone struction and perfect the insulation of the parts and to simplify and cheapen' the construction by reducing the number of parts and using only parts that can be easily produced.

A special detail of construction is that of the insulating bodyorblock which is made of such form that it can be fashioned in a simple mold, by one compression of the porcelain mass when in plastic condition, by coacting dies. And a special object relating to the insulation is toiso secure the parts bya simple rivet that they can not possibly become misplaced and cause a short circuit, and so that the correct assembling pfbthe parts may be performed by unskilled a or.

With these and other objects in view I have devised the novel keyless socket of which the following description in connection with the accompanying drawing is a specification, reference characters being used to indicate the several parts.

Figure 1 is a vertical section of my novel socket complete; Fig. 2 a section of a shell on the line 22 iii Fig. 1, looking in the direction of the arrows, the outer insulating washer and the contact spring appearing in inverted plan; and Fig. 3 isa section on an enlarged scale on the line 3-3 in Fig. 2.

1O denotes an insulating body which is provided in one side with a recess 11 to receive one of the terminals, indicated by 12, and in theopposite side with a recess 13 to receive the other terminal which is indicated by 14. Terminal 14: is provided with a downwardly and inwardly extendin arm 15 which is provided at its lower end with a head 16 lying in the horizontal plane and having a hole through it.

17 denotes an internal recess in the body which communicates with recess13 and ,is

Specification of Letters Patent.

Application filed October 22, 1908.

Patented Nov. 30, 1909.

Serial No. 459,058.

made large enough to permit the convenient insertion of arm 15 and the head.

The body or block 10 is formed of one piece and the side recesses 11 and 13 extend to the upper end of the body so that when said body is formed of plastic porcelain in a simple mold comprising a casing and up-' per and lower die members, the said recesses 11 and 13 may be formed by two projections of the upper die member which projections may be readily withdrawn by an upward movement preparatory to removing the molded mass to be baked. The recess 17 extends from the lower face of the block and, as will readily be seen in Fig. 1, is of such shape and location that it can be formed by an upward projection from the lower die member, which projection can be/ readily withdrawn. or from which projection the molded mass can be readily removed. The holes for the screws hereinafter referred to can be formed by pins projecting from either die member, preferably the lower one. The projection from the die which forms the recess 17 will have, of

course, in practice, a side which will slidinfact nothing but the simplest kind of a single molding operation preceding the baking.

18 denotes circuit wires which are connected to. binding screws 19 engaging the terminals.

' 20 denotes the screw shell whose base is provided with an external de ression indicated by 21 to receive an insu atlng washer indicated by 22 and with an internal depression indicated by 23 to receive ant insulating washer indicated by 24, the base of the screw shell lying between said washers.

25 denotes a contact spring for engagement by a lamp base. I preferably form this contact spring from a/disk of metal in which I make a circular cut 26 leaving the central portion of the disk, indicated by 27,

connected to the outer ring by a neck 28,the u The central portion of the contact spring leavethe screw shell perfectly insulated edge of the outer ring opposite to the neck being sprung out of the plane of the central portion, as-elearly shown in Figs. 1 and 3.

lies contiguous to insulating washer 24, and head 16 upon arm 15 lies contiguous to insulating washer 22.

The insulating washers, and head 16 (and with itsecur'd tothebase of the shell by means of an eyelet or-tubular rivet 29 which passes through said parts and is headed down upon the central portion of the spring and the head, as elearly shown in' Fig. 3. It should be noted that the base of the screw shell is provided with a central hole 30 of greater diameter than the rivet or eyelet so as to the contact spring terminal 14) are from the contact spring, eyelet and head which are of opposite polarity. As the man ginal portions of the

insulating washers

22 and 24 so engage the shoulders resulting from forming the

depressions

21 and 23 that said washers can not possibly shift laterally after being connected by the rivet 29, and as thehole 30 is of sufficiently larger diameter than the said rivet to prevent'any short-circuit between said rivet and the screw shell 20, the insulation of these parts remains perfeet under all conditions of handling and use. This is of especial advantage when a Wire 18 is being connected tothe arm. 15 by the screw 19, because since said arm is supported by the head 16 which, in turn, is localized by the rivet 29, theact of making the connection might result in so shiftingthe rivet asto permit contact thereof with the side of hole 30 if said rivet were not firmly held by the washers which, in turn, are held centrally by means of their marginal bearings as described. Unskilled labor can not assemble the parts incorrectly because the depressions in the screw shell determine the location of the washers, the washers determine the location'of the rivet, and the rivet, in connection with therecesses 17 and 13, determine the proper placing of the arm 15 and its head It}.

Terminal 14 requires no other support than theinsulated attachment of the head to the screw shell. Terminal 12 is secured in place by means of a screw 31 which also serves as a means of attachment of the screw shell to the insulating body. The other screws, indicated by 32, by which the screw 1 shell is secured to the-body, pass through the body longitudinally and engage nuts (not shown).

lVhen a lamp base (not shown) is turned into the screw shell, the center contact of the lamp base engages contact spring 25. The

passage of the current is from terminal 12 through screw 31 to the screw shell and returning through the lamp base, contact spring, eyelet, head and arm 15 to terminal 14L.

Having thus described my invention, I

claim:

1. An insulating body having one of its .ends formed with side recesses extending to the end surface, and having an internal recess extending from its other end to one of the side recesses.

4. An insulating body having one of its ends formed with side recesses extending to the end surface, and having an internal re- 'CQSS extending from its other end to one of the side recesses, and having walls of the body material between the side recesses and the opposite end of the body, and formed with screw holes passing through the body for the purpose'specified.

3. The combination with a screw shell having its base provided with a hole and with shoulders, of insulating washers engaging said shoulders and having holes in a linement with the hole of the serewshell, c011- tacts above and below said washers, and a rivet'connecting said contacts and passing through said holes, an annular space being formed between said rivet and the edge of the hole in the screw shell.

4. The combination with a screw shell having its base provided with a hole and with shoulders, of insulating washers engaging said shoulders and having holes in alinement with the hole of the screw shell, a. contact bearing against one washer, a head bear: ing against the other washer and having an arm and a terminal, and a rivet connecting 100 said head and contact and passing through the holes of the shell and washers, an annular space being'formed between said rivet and the edge of the hole in the screw shell.

In testimony whereof I aflix my signature, 105

in presence of two witnesses.

' CLARENCE D. PLATT. lVitnesses:

A. M. l voos'rnn, S. W. ri'rninn'roN.