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Publication numberUS1345091 A
Publication typeGrant
Publication dateJun 29, 1920
Filing dateJul 7, 1919
Priority dateJul 7, 1919
Publication numberUS 1345091 A, US 1345091A, US-A-1345091, US1345091 A, US1345091A
InventorsKellogg Andrew J
Original AssigneeKellogg Andrew J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Automatic lockout for lamp-sockets
US 1345091 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




1,345,09 1 Patented June 29, 1920.



Specification of Letters Patent.

1,345,09 Patented June 29, 1920 Application filed my 7, 1919. Serial in. 309,099.

T 0 all whom it may concern:

Be it known that I, ANDREW J. KELLooe, a citizen of the UnitedStates, residing at Acton, in the county of Los Angeles and State of California, have invented new and useful Improvements in Automatic 'Lock- 'outs for Lamp-Sockets, of which the follow ing is a specification.

My object is to make an automatic lock out for lamp sockets, and my invention consists of the novel features herein shown, described and claimed.

One of the purposes of my automatic lock out for lamp sockets and the like is to prevent unauthorized persons from removing the lamp and connecting flat irons, coffee pots, toasters, heaters and the like to the lamp socket, and the function of the lock out is that when the lamp is removed an insulation is brought into: place over the contact so that the. plugs cannot be reinserted and electrically connected. The result is that when a person removes a lamp to connect a utensil, the utensil cannot be electrically conshowing the parts in the lock out position,

Fig. 1 showing the parts in normal position for connecting the lamp and Fig. 4 showing the parts in the lock out position. so that no lamp or plug can be electrically connected.

Fig. 5 is a view analogousto Fig. 3 and showing the parts in position as they would be after the lamp is removed.

Fig. 6 shows the operation of removing the automatic lock out to restore to its normal position for the reinsertion of a lamp.

Fig. 7 is an edge View of the automatic lock out shown in Figs. 1 and 4 and as seen looking in the direction indicated by the arrow 7 in Fig. 8.

Fig. 8 is an enlarged plan view in detail I analogous to Fig. 4 and looking in the direction indicated by the arrows 8 in Figs.

7 and 9.

line9-9 of Fig. .8.

Fig. 10 is an enlarged plan of the electric plug or connector carried by the automatic lock out. 1 Fig. 11 is a diametrical cross section on the-line 11-11 of Fig. 10.

The connector 1 is a circular button made of brass or other good conducting material Fig. 9 isa diametrical cross section on the a and has a flat periphery 2, a concave lower face 3, a concave upper face 4, and. a stop rim 5 extending outwardly from the periphcry 2 at'the upper side 4. I

I The connector 1 is mounted in a frame. 6.

The frame 6 is made of hard fiber or the like to insulate or electrically isolate the connector. The frame 6 has a central opening 7 in which the periphery 2 of the connector 1 fits slidingly, the rim 5 serving to hold the connector 1 from sliding downwardly out ofthe frame. The frame 6 is fiat when seen edgewise, as in Fig. 7, and circular when i seen sidewise, as in Fig. .8.

The frame 6 18 thick enough 'tocarry fitting the thread 9 of the lamp socket 10 so that the frame may be screwed into the lamp I out plate 14 is mounted in a recess 15 formed from one side of the frame 6 and extending through slightly more than a quarter of the 7 area of the side face of the frame and substantially half the thickness of the frame. This recess also mutilates the thread 8 without destroying its action.

The connector 1 normally is centrally located in the frame on a plane parallel with about two turns. of a thread 8, said thread 8 ,6 r

its axis, and the cut out plate 14 is connected I at its outer end by a pivot pin 16, and the free end of the plate 14- bears against the periphery 2 of the connector 1 thereby resisting the tension of the spring 12 and holding the parts in normal position.

Pinholes 17 and 18 are formed from the lower face of the frame 6 diametrically opposite each other for the insertion of a span ner key 19 in screwing the frame in and out.

The automatic lock outs are prepared 12 willswing the plates inwardlyin' front of the connectors 1, and the lamps cannot be plugs cannot be electricallyconnected to the sockets for the operation of flat irons and 1 the like; The lamp sockets are out of comwith the parts in their normal positions as shown in Fig. 1, and when it is desired to insert a lock out into a lamp socket the spanner key 19 is applied and has pins 20 and 21 fitting in the pin holes 17 and 18 and a handle 22 for manipulation.

The automatic lockout is inserted into the lamp socket with the stop rim fiengaging the inner side of the frame 6 and the pivoted cut-out plate 14 on theouter side of said frame; and when the cut-out is screwed up into the socket 10 the inner face of the frame 6 will stop at the inner end of the threadi),

and when the lamp 23 is screwed into the socket the lamp contact 2 1 will bear against the outer face of the connector 1 and press the connector inwardly relative to said frame, thereby moving the connector laterally out of the place of the cut-out plate let and pressing the connector 1 against the contact 25 thereby electrically connecting the lamp to the socket.

During this time the cut out plates 14 bear against the contacts 2 f, but as soon as the lamps are unscrewed even a turn or so or removed from the sockets the cut out plates 14: are released, and the tensions of the wires replaced and electrically connected and mission until the lock outs are removed and restored to their normal positions.

Thus I have produced an automatic lock out for lamp sockets and the like comprising a frame adapted to be screwed into the lamp sockets ahead of the'lamp and having a connector normally holding an insulation plate and adapted to be displaced by screwing the 'lamp in so as to release the insulation plate able in the direction of movement of the err-=- tering lamp, a pivoted insulating plate carried by the frame biased to move over the center contact aperture and normally held from such position by engagement withthe center contact.

2. An automatic lock' out forlamp sockets comprising the combination with a lamp socket and a lamp, of means screwed into the lamp socket including an insulating element mounted on said-means to swing over the socket contact when thelamp'is re moved. V

In testimonywhereof I have signed name to this specification ANDRE.W J. nLLoG l

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5698935 *May 14, 1996Dec 16, 1997Leviton Manufacturing Co., Inc.For completing an electrical circuit
U.S. Classification439/133
International ClassificationH01R33/00, H01R33/97
Cooperative ClassificationH01R33/971
European ClassificationH01R33/97B