US1125605A - Plug for incandescent electric lamps. - Google Patents

Description

W. 0. TREGONING.

PLUG FOR INGANDESGENT ELECTRIC LAMPS.

APPLICATION FILED MAY 13, 1912.

L,1Q5,605, Patented Jan.19, 1915.

INVEN'TOR h Walliam @Tmggazziwg BY MW 1 3' V a bottom view of F snares rarities? WILLIAM c. *rnneoirrne, or cnnvnnann, onto, ASSIGNOR, BY MESNE nssrenrtanrs, fronnmaaarn n'LEcrRrc mauurncro'sme COMPANY, or cnroaeo, ILLINOIS, a.

'conrornrron or ILLINOIS.

PLUG FOR l'iNGAINIBIESGENT ELECTRIC LAMPS.

menace.

Application filed may 13, 1912.

T 0 all whom it may concern:

Be it known that I, VILLIAM C. Tensor:- iNe, citizen of the United States, residing at Cleveland, in the and State of Ohio, have invented certain new and useful Improvements in Plugs for incandescent Electric Lamps, of which the the strand untwisted.

engaged relations,

ig. 5, and Fig. 5,' 1s a sectional elevation of the porcelain or like body or headof the plug with certain arts attached thereto as hereinafter ascribed. Fig. 6 is a sectional elevation of a modification of the flexible connecting mechanism between the two non-conducting partsof'the plug as hereinafter fully described.

,Many difi'erent makes'of plugs have been on the market from time to time and which may be divided into two typesaccording to their construction, one of said types having the conducting cordor strand fixed therein so that when'the plug is turned toscrew it into its socket the strand will turn with it and become twisted accordingly, and the the strand so related other type having therein that the plug can be' screwed into the socket and the strand will not turn with it and hence not become twisted.

Without discussing the acknowledged. ohjections to both forms or types as heretofore made the present invention enters the art as it were between both, having the strand so connected that it will receive a partial twist when screwing up but also such that it will untwistaut'omatically as the part grasped by the hand is mo- Inentarily released to take a new-grip, and this'action will continue and wind and unof the plug occurs wind the strand as often as the hand is changed until at last when turning of the county of Guyahoga Fig. 3 is an enlarged central sectional elevation of the plug in dis-.

as in Fig. 1. Fig. 4 is Specification of Lette'rsPatent.

Patented Jan. T19, i915; Serial no. ceases.

plug ceases the' strand will resume its straight or natural condition as the locking engagement of the parts is relaxed.

Now, observing the tural aspects, we have the non-conducting body or head 6, upon which the other A arts are directly or indirectly mounted, an the said body has a metallic band 2 about its reduced portion which has one or more recesses 3 struck in its side adapted to make rotary interlockingengagement with lugs/istruck on the inside of the screw shell 5 when said band is pressed upward for this purpose and to rotate the said shell. Obvi ously the said recesses and lugs could be interchanged as to the parts and be the same in effect. The said body bhas a milledrim about its side adapted to be conveniently.

gripped by the hand to turn the plug, andwhen turnm g occurs (and assuming that the plug is in an inverted position to that shown in the drawings) the said body is pressed upward into engagement with the said lugs 4 and turned and thereby turning the screw shell in its socket, not shown. When the hand has turned as far as is comfortable the grip is released, the said body 6. dropshy gravity, and any twisting of the strand that has occurred instantly rights itself. Then another grlp is made with a" further turn of the plug and so on until the "plug 1s screwed home into its socket andelectrical connection is completed. Of

course the instant the un-lift upon the body b isreleased it drops down and isfree to .rotate regardless of said shell 5 but elec trical connection remains through or between the said shell and ring 2 which in any case overlap sutliciently for this purpose. A term nal binding screw 6 is shown as engaged in an ear on the band 2 as seen in Figs. 4 and 5.

It follows from bodv or head 2 is supported in a sliding relation within limits upon or about the said shell 5, and said shell is supported at its other end or edge by several associated parts comprising a stem or standard 7 whichi's embedded in body I) and has a threaded hole through its free right angled end adapt'd to in a porcelain disk d which-is supported within the edge of the said screw'shell.

plug first in its Stlllilr h connecting the foregoing that the has a central bore occupied by the thimble 9.

I Gopiesof this patent may be obtained for The said shell may be engaged with said disk in any suitable way, and the said disk The screw 8 has a relatively long cylindrical head slidably fitted in the inner portion of said thimble and a body portion of smaller diameter slidable in the neck or contracted inner portion at of the thimble. 'The screwthrcaded and relatively reduced extremity 10 of the said screw engages through the threaded hole in the right angled portion of stem 7 and thus an effective support is provided for the outer portion or end of said screw shell 5 while at the same time a conducting electrical connection is formed from the flanged out end 15 0t thimble 9 through the said stem or standard 7 or to the binding screw 16 thereon.

The adaptation of the stem or standard 7 to slide within limits through the peculiar construction of screw 8 in thimble 9 provides that may be termed a flexible electrical connection with the said thimble from the body I), or rather with the band 3 thereon, and the length of the said body portion of the screw measurably fixes the limit of movement, es-. pecially to open position, as in Fig. 1. Therefore, having the plug more or less engaged in its socket, not shown, the head of body 7) can be manipulated, and in a sense it acts like a wrench as it is raised or brought into engaging relations with the screw shell to turn thesame, and in this movement the stem or standard 7 and screw 8 participate.

Fig. 6 shows a modification in this particularly that the screw 12 is a stationary part in disk d and has a flanged contact head 15' I outside said disk and a spool 14 is threaded on said screw outside said disk while the stem or standard 7 has a hole in its right angled portion engaged on said screw and slidable thereon within limits like the screw 8 in spool 9, Fig. 3.

In the foregoing construction the body I) is freely rotatable in respect to the shell 5 in either direction when disengaged at the points 3 and l, but the overlapped engagement between said parts is close and in cur rent-conducting condition and the binding screw 6 marks one of the terminal connections as above described. The other terminal carried by the member I) is at 16 on the stem or standard 7, which presumably is molded into said member in its manufacture. The flanged head 15' and the screw serves to make electrical connections in the plug socket. However, these are details of inc-idental imp'ortance merely as the invention resides essentially in the novelty which operatively separates the body I; from the screw shell 3 and in one position leaves said body free to turn in either direction independently of the said shell and in the other position interlocks therewith and becomes an instrument for turning the shell into and out of its socket. Any construction having this peculiarity and function is considered as within the spirit of this invention.

In Fig. if the body b be rotated the screw 8 fixed on stem 7 will rotate also in thimble 9, and in Fig. 6 the stem 7 will be rotated about the spool 14.

What I claim is:

1. A plug for electric lamps comprising a screw shell of conducting material and a non-conducting part having a ring about the same in sliding relations with said shell, and said shell and ring provided with means constructed to mechanically interlock.

2. A plug for electric lamps having a screw threaded shell, a body of non-conducting material having a normal free rotation in respect to said'shell and a metallic band about the same in overlapping relations wlth said shell, and the said shell and band provided withinterlocking portions at their meeting edges. I

3. A plug for electric lamps having a screw-threaded metallic shell and'a non-conducting body adapted to be engaged and disengaged rotarily therewith, and means supporting thevopposite end of said shell comprising a non-conducting part and slidably related conducting means centrally of said several parts.

a. Aplug for electric lamps having a screw-threzided metallic shell and a non-conducting body having a contact band about its inner portion and said band and shell provided with means constructed to mechanically interlock, the said body being normally disengaged and free to turn independently of said shell.

A plug for electric lamps having ascrew-threaded shell and a body slidably and rotatably related thereto having a band about the same in overlapping relations with said shell, a disk of non-conducting material carrying the opposite end of said shell and means supporting said disk comprising a stem fixed in said body, a spool rotatably mounted in said stem and a screw on which said spool is engaged and uniting said stem with said disk.

In testimony whereof I afiix my signature in presence of two witnesses.

lVILLIAM C. TREGONIN'G.

, Witnesses:

F. O. MUssUN, L. H. STADE.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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