US1643655A - Electric socket - Google Patents

Description

fp 1927' F. GILES ELECTRIC SOCKET Filed Sept. 26. 1925 Patented Sept. 27, 1927.

UNITED s TATE 'Application mm sepcemb'er' Electric lamp sockets made of insulating material are very desirable for use in many installations, as for instance, where the socket is'liliely to come in contact with metal which might cause a short circuit if either of the lead-in wires should happen to contact with the socket. To provide tor such uses; sockets have been made of porcelain,

but they are objectionable}; because likely to be broken and also are unduly bulky.

One of the objects ofthe present iiIVe'nlilO'H is the provision of an electric socket fixture which may be made, of molded electrical insulating material, a; bakelite yet which will present a pleasing appearance and may be subjected to rough usage. without breakg c A further important object of the present invention is to eliminate as much as possible the occurrence of a short-circuit within are thoroughly protected. The internal" terminal connections are mounted on a peculiarly lormed' insulating carrier which pro-- vides' a separator for the leads and is prevented from inadvertentdisplacement due to turning of a plug or lamp bulbinto the socket.

I carry out the above objects by utilizing a substance such as bakelite which may be readily molded to any desired shape, and I so mold this substance to form a core and an enclosing housing therefor. The current-carrying members are arranged to be mounted upon the core so that the electrical connections may be readily made independently of the connections between the core and the housing. Moreover, I make the housing in two parts with suitable means such as a threaded connection for holding the members together and I utilize the locking connection between the members for locking the core in adjusted position with reference to the housing. In making the core, I provide a partition wall which divides the housing into two compartments into each of which one of the terminal connections extends. In this way,

PATENT OFFICE.

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2a, 1925-. serial No. 53794;

theel'ectr-i'cal conductors which are led into. the fixture maybe readily insulated from ea'ch'oth'ereven though there may be wire adfiacent' the binding screws; The means for carrying out my inventions illustrated in the accompanying drawings in theapreferred form, wherein Fig. '1 isa side elevation of a socket fixture made in accordance with my invention"; Fig. "2 is a 7 section takenvertically through fixture shown in Fig. 1 and on a: plane indicated by the hne 2- 2 in Fig; 1 Fig. 3 is a section taken vertical-1y through the fixture on a" plane at rightangles to thateshown in Fig; 1, as inclicated by the lines 3"'-3 in" Fig. 2; Fig. & is horizontal section taken through the fixture on a plane indicatedby the line 1 4 111 Fig; 2'; Fig. 5 is a perspective of the insulating terminal carrier which is located within-th'e'sooket she'll; v

A socket fixture made in accordance with my invention embodiesan insulating core indicated at and a housing whichsun rounds the core -and provides a. support" therefor. The housing is ill"ustrated as 'comprising'a substantially cylindrical member 1' 1 and a cooperating closure 12, which may be locked together by a threaded connection 1'3. The core" as well" the housing is made" of" a substance such as bakelite, which may he readily formed under heat and pressureto' anydesired shape. c

The core has a disk-liliebodfg 15, the bottom of which is arranged to engage a sliou'l derlGj in the member 11 and to'be'su ported thereby: The body as shown, is su anti ally cylindrical in shape and has a partition 17 which extends upwardly from the central portion thereof and which divides the chamher in the member 12 into two compartments 18 and 19 respectively; The core moreover has openings in the nature of slots 20 and 21 therein, through which terminal conductors 24 and 25 respectively, may extend.

The terminal conductors are shown as being substantially L-shaped members having sufficient length to project beyond the upper end of the member 11. The lower end of the conductor 25 is electrically connected to a shell while the lower end of the conductor 24 is electrically connected as by a securing member 31 to the central spring contact 32. The securing member 31 also functions to hold the shell and the conductors in locked position with reference to the core. The electrical connections with the lead-in wires 26 and 27 may be made on the core before the core is assembled within the housing.

By making the conductors 24 and 25 of sufficient length to projectslightly beyond the end of the member 11, the binding screws 84 and 35 may be visible without necessitating removal of the core from the member 11 and without requiring the electric plug or other electric article which is mounted within the shell 30 to be. removed therefrom, thus permitting ready inspection of the connections. r

To prevent the-core from rotating whenever a plug or lamp bulb is threaded into the shell, I have shown the interior portion of the cap as having spaced lug 40 and 41 which engage opposite sides of the partition 17 as shown in Figs. 3 and 4. This construction locks the core against rotation with reference to the housing -when the cap is threaded tightly into the member 11. By putting this lock on the cap rather than the shell, I enable the interior of the shell to be cylindrical and closely. embrace the screw threaded sleeve and the core without waste of space or material. Each of the three insulating parts is so formed that it may be readily molded.

In view of the foregoing description, it will be evident that I have provided a socket fixture which may be made almost entirely of molded insulating material and may be assembled in a very expeditious manner. Thus, I obtain a device which presents a finis hed appearance without necessitating the use of metallic stampings and having a housing construction with no risk of short-circuiting the connections. Moreover, my socket may be very cheaply manufactured.

Having thus described my invention, I claim 1. An electric socket having a shell and cap each made of insulating material threaded one into the other, the shellhaving an internal shoulder, a supporting member carrying'the screw threaded sleeve, the central contact, the conductors thereto and the binding screws, said supporting member engaging the shoulder in the shell, and having a partition between the binding screws of the two contacts, which partition coacts with the cap to prevent independent rotation.

2. A socket fixture comprising in combination a two-part housing composed of an insulating shell and an insulating cap screw threaded thereto, an insulating member for supporting electrical contacts arranged to be held against longitudinal movement within the shell when the two parts of the housing are assembled and flanges extending inwardly from the cap and outwardly from the supporting member, one in engagement with the other, for preventing turning movement of the supporting member with reference to the housing.

3. An electric socket fixture comprising, in combination, a substantially cylindrical insulating shell, an insulating capin threaded engagement therewith and provided with an opening near its end for receiving conductor wires, a core member maintained in place against longitudinal movement within the housing by the threaded engagement, and a web carried thereby dividing the interior of the second-named housing member substantially into two chambers, lead-in contact plates secured to the core and extending on either side of the web, each adapted to be secured to its'conductor wire within its respective chamber at one end and at the other to contact members within the firstnamed housing member, and projections on the interior of the cap adapted to engage the partition to prevent independent rotation of the cap with reference to the core member.

In testimony whereof, I hereunto afiix my signature.

ISAAC F. GILES.

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