US1672556A - Two-light plug - Google Patents

Description

T. A. BOTH TWO-LIGHT PLUG Janes, 192s.

Filed June 154,v i524' 3 nvm/Uro@ yso Patented `lune 5, 1928.

' *UNITED-STATES ToNJns A. BOTH, or sTRATronD, coNNECTreUT, As'l'sIeNen To? THE ooNNECTICUT ELECTRIC MANUFACTURING COMPANY', or' BRa-DGEPORT, 'CONNECTICUT,- A con.-

PORATION or CONNECTICIT.

Applimtim` sled June 13,

This invention relates to a' multiple light plug, specifically to a two light plug, andhas tor an object to provide an improved plug of this type which will be simple in con,- struction, involving a minimum number of parts. and in which these parts are so arranged that they may be easily and quickly assembled.

Vith the foregoing and other objects in' view, I have devised the constructionillusf 'trated in theaccompanying drawing torming a part of this specification7` similar reference characters being employed throughout the various figures to indicate corresponding elem-ents. In this drawing, o

Fig through the device.; Y

Fig. l2 is a longit dinal sectiony substantially at right angles to that of Fig. 1-.

Fig. 3 is a transverse section substantiallyon line 3 3 ot Fig. 1. y

Fig. 4L, is a transverse section substantially on line 4-41 ot Fig. 1, and

Fig. 5 is an end view ot' one branch of the body member, the:y view beingv substantiallyv on line 5 5 of Fig. 1. The device comprises arbody member 10, preferably ot molded insulating material such as a phenolic'v condensationproduct, and this body comprises three branches 11, 12 'and 13. The branch 11 has a'shoulder 14 about the entrance to a `pocketfl on which shoulder is seated one end of an externallyV threaded shell contact 16. This contact has at its inner end inturned lugs 17 and embraces an insulating element 18 which I term a button `as it has arounded end projecting through the outer end of the Contact 16. This element is provided with a shoulder 19 adjacent its outer end which is engaged by a spun over flange 20 of thecontact 16.

The branches 12 and 13 are each providedshown in Fig. 2.

0f. `1 is 'a central longitudinal `section 1924. serial no. 719,779.

lugs 17 of this shell, through suitableopenings and the lugs 24'inthe ybody member yand arek threaded into the conductors 28, aS These screws securely r der 14 and screws 29 are passedthroughtlie j mount the shell y16 and 22 in position Aini the body member. The shell 23maynowbe in. serted in thelateral branchi13 and itslugS 25 secured to the conductors 28 by Screws 30 passing through these lugs and threaded into the conductors. It will, therefore, be apparent that all threef of the threaded shells are' electrically connected and securely .mounted in the body member by means-ofthe rscrews 29, k3 0 and the conductors 28.

vThe centraly contacts are; independently mounted in f the body member. A 11i-etal angle block 31 is mounted a'tthe :inner end ofthe `pocket 15 and thecentral contacts 26 and 27 are securedt'o this, A blockby screws 32 and 33 respectively-which; PSS through suitable openings y311 kand .'35 `in the body member. Thus these central' contact-s are securely mounted in position and are also electrically connected. The insulating plug or button 18- is now placed within the shell o 16 and secured in position by passing screw 36 through theY end thereof and threading it into the` block 31. The head 37 of this screw forms a central contact at the end of the button and thus all three of the central contacts are electrically connected. The end of this button rests against the lugs 17 on the may be provided itv desired, and assists in holding the contact 16 against the end of the body. lThe outer ends of this shell 16 are then spun over the shoulder 19, as shown at 20, and the device is completed. This spun over end gives 'a finished appearance' and prevents loosening of the button. It will be apparent that the branch11 may be inserted in any standard lamp socket or socket receptacle, the contacts 16 and 37 en# gaging the contacts in the sockets, andas the shell 16, and a small inturned flange 38 which threaded contacts are all electrically connccted as well as the central contacts, the

branches l2 and 13 may be used for lamps or plugs having connection with suitable appliances. The entrance to the sockets 2l may it desired be tapered as shown at 39 to facilitate insertion-of the lamp or plug, and these branches may be provided with annular` grooves 40 in their outer walls for the pur- I' `pose olf mounting shade or re'fiector holders.

Having thus set l'orth the nature invention, what I claim is: f

l. In a two light plug a body member of molded insulating material having a pocket leading :trom one end thereof, a metal block mounted in said pocket, an .externzdly threaded shell contact having inturned lugs embracing the entrance to said pocket, a

o l" my Vsocket extending inwardly troni the other the metal block "and forming a central contact at theend of the button.

2. In a two light plug an insulating body member, said body comprising three branches two of which are provided with sockets, an internally threaded Contact shell in each socket, an externally'threaded contact shell carried by the other branch, inturned lugs at the inner ends ofthe threaded contacts, conductors engaging the lugs of the internally threaded contacts', screws passing through the lugs of said contacts and threaded into said conductors, the .screws for one of said contacts also passing through the lugs ot the externally threaded contact and forming an electrical connection therewith, and electrically connected central contacts for said threaded contacts. v i

' 3. Ina device of ,the character described, an insulating body member having three branches, one of said branches having a pocket leading 'from the end thereoic and the other two branches having sockets, said body being provided with across wall separating` the pocket from the sockets, a block mounted in the pocket, central contacts in the sockets, securing screws passing through the central contacts and the cross wall and threaded into the block to clamp the contacts andthe block to said wall, an externally threadedshell Acontact having an inwardly extending lug mounted about the entrance to said pocket, an insulating button embraced by said contact, a central contact comprising a threaded bar extending throughY d button and threaded into the block to clamp the button to the body, screw shell contacts mounted in the sockets and having inwardly extending lugs, conductors engaging with. said lugs, screws passing through the lugs of the exter- -nally threaded contact and one of the socket TONJES A. BOTH.

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