US1399502A - Electrical protective device - Google Patents

Description

J. J. LODGE. ELECTRICAL PROTECTIVE DEVICE.

APPLICATION FILED DEC. 18. 1918.

Patented Dec. 6, 1921.

wattage or to employ an electrical iron,

heater or the like, notwithstanding the de- JAMES J. Loren, or new roan, n. v.

ELECTRICAL PROTECTIVE nnvron.

Specification of Letters Patent.

Patented Dec. e, 1921.

Application filed December 18, 1918. Serial No. 267,225.

To all whom it may concern:

Be it knownthat I, JAMns J. Loner, a sub ect of theKing of Great Britain, residing at borough of Manhattan, city, county,

and State of New York, have invented new and useful Improvements in Electrical Protective Devices, of which the following is a a specification.

This invention relates to protective devices for electrical apparatus.

In the use of standard lamp] or wall sockets, and similar contact devices it is within the power of any guest or other party infa hotel or similar abode to replace any lamp by a lamp of higher electrical sires of the party in control to the contrary. An object ofthis invention is to provide means for precluding the, insertion within "any standard or similar electrical contact device, such as electrical lamp orwall sockets, or the like, of lamps, plugs or like electrical attachment or consumption device undesired bythe partyin control ofsuch electrical sockets oro-ther contact means. Thus,

in accordancewith my invention, in hotel and similar uses, the party in control may 7 provide forlampsor other consumption of ets or other contact means, and accordingly regulate the use of electrical irons, heaters, stoves,and the hke, of h s own choosing.

his choosing to be used with the lampsock- In accordance with the most preferred forms of my invention, means are provided to be inserted within any standard or similar socket or other electrical contact device and the lamp orother attachment or con-' sumption device desired bythe party in control to be used in such socket reduced in diameter or otherwise modified or special lamp or other electrical apparatus provided, 1 enabling such desired lamp or other apparatus to be readily positioned in operative relation with the contacts of the socket or othercontact means but precluding the use of any standard lamp or standard plug. 0

Further features and objects of the 1nvention will be more lullyunderstood from panying drawings, in whichthe following description and the accom- Figure 1 shows in central section a stand ard' socket having my insert means positioned therein; p a y Fig. 2 is a sectional elevat on of my eans removed iron; the seeker;

Fig. 3 is a face view of a disk, optionally used as a part of my insert means;

Fig. i is a side elevation of a plug adapted to co'clperate with my insert means to be positioned within the socket in operative relattiion with the electrical. contacts thereof; an

Fig. 5 is a side elevation of an electrical lamp adapted in cooperation with my insert means to be inserted within the electrical socket.

Referring to the drawings, the socket 1 is shown as of usual standard construction comprising the inner threaded metal contact or shell 2 adapted to be connected to one line of the circuit and the rearwardly disposed button 3 adapted to be connected to the oppositeline of the circuit.

My insert means comprises the sleeve portion 4: which may be threaded, say for example two and one-half or three threads and accordingly of approximately one-half of the length of the metal contact shell 2. Such sleeve portion. 4 may be of insulating material, or may be of conducting material, in which latter instance, I provide the insulating member 5, such as a disk of insulating material having the substantially central opening 6.

If desired, such disk 5 may be secured to the rearward portion oi? the sleeve 4:, as by providing the sleeve 4; with the crimped thus practically hidden from view, parti-cu- Y larly when the sleeve l is made of the same metal as the shell 2.

The attachment or consumption device desired to be used in the socket, as thus provided with my insert means, is provided with threads of its contact reduced. or otherwise modified in accordance with the insert means, say from two and one-half threads,

whereby the contact of such attachment or consumption device is-received within my insert means and electrical connection effected. Thus, the standard plugs, lamps and the like may be utilized with my invention by pressing in the required number of tllleeds- Spec al plugs or lamps or the initially provided with the reduced or modifiedcontact, may also be utilized with my invention. i

In Fig. 4, I have'indicated the plug? having its foremost threads reduced in diameter, relative to the remaining threads 10. In Fig. 5, I have shown a lamp 8 having orequivalent,

- The control afforded my invention enables di'fierentfforms, c'. e, difierent d ameters of'ins'ert means to be provided respectively forlampsand plugs, and thus restrict certain sockets" for lamp use .and certain I other sockets for use with plugs ofcurlers,

stoves and theilike, respectively. Such regulate'd control is readily carriedout-by reason or the relatively small variations in dimensions elfective in permitting the desired consumption device tobe inserted but precludingthe; insertionofany undesired consumptionzdevi'ce. 7 V p 7 Whereas Iliave described my invention -byre'i eren ce to specificfor'ms thereof, it will be understood that many changes and modi- ,fications "may be made without departing 35 V by the appended claims.

from the. spirit of the invention as defined I claim terial serving as one contact and of predetermined'depth for receiving .the base of an electrical lamp or plug, said socket having its other contact insulatingly mounted interiorly of said hollow member of protecting means comprising a hollowfelementhaving an outer diameter lessthan the said uni-- form diameter of said recess and positioned within said recess, said protecting device when in position in said recessfreely exposing. the contacts ofsaid socket for elecbase of the lamp or the plugeirtends through sa d hollow member to afford electrical con trical connectiom'said hollow element hav- 7 ing a length appreciably less than said predetermined depth of saidrecess, whereby upon insertion of the lamp or the plug the nection between the contacts of the socket respectively with the contacts of said base respectively. s, 7

"The combination with an I electrical socket havinga receivingopening of a'pre- V and a threaded contact disposed, Withinsa d pesin nd another conth t di posed rearwardly within saidopcnsocket having determined ,posed within said receiving opening, said hollow member having a length appreciably less than said predetermined depth, said hollow member being open at its outwzmlnnd inward ends to provide free electrical access to said another contact.

3. The combination with an electrical a receiving opening of a preepth and a threaded contact disposed within said opening and another contact disposed rearwardly within said opening, of'a hollow threaded member in electrical connection-with said threaded contact and insulated from said another contact and disposed within said receiving opening, said hollow member having a length a preciably less than said predetermined rfrpth, said hollow member being opentatitsoutward and inward ends to provide free'electrieal access to said another contact.

4. The combination of an electricalsocket comprising a hollow circular-shell serving as one contact, a base of insulating material and a second contact mounted on said base and a second cont-act mounted on'said base '1. The combination with an electrical 1 socket providedwith a uniform circular hollow member of electrically conducting maand within said shell, of protecting means comprising. a perforated hollow circular 'vide direct electrical access to said second contact through said hollow circular member and said member of insulatingmaterial;

6. The combination with an electrical socket having, a threaded shellser-ving as one contact and a second contact disposed rearwardly of the opening of said shell, of a threaded hollow member having a length less than the length of said threadedshell and disposed within said shelha member of insulating material disposed between said threaded member and said second contact but exposing said second contact andabase of an electrical: attachment device having its end threads reduced in exterior diameter,

I whereby upon insertion of such plug within said socket,-said reduced threading of said plug extends through said threaded m'omber andsaid -insulating member to-establish contact with said threaded shell and said second contact of said socket.

.7. The combination with an electrical socket comprising .a' hollow Bhallserfing as one contact, a base of insulating material and a second contact mounted on said base, of a hollow circular member constructed to be positioned within said shell, said hollow member having open ends and a base of an electrical device being threaded throughout its outer face serving as a contact and constructed to engage in electrical connection within said shell, said threaded face having for a certain portion thereof a threading of a determined diameter and the remaining portion for an appreciable extent being of reduced outer diameter and projecting through said hollow member.

8. The combination of an electrical socket base of said shell, protecting means comprising a hollow circular element constructed to slidingly engage said circular shell, said hollow circular element being open at its inward and outward ends, a perforated disk of insulation disposed between the inward end of said hollow circular element and said second contact and a base of an electrical attachment device having its forward portion of relatively less cross section and extending Within said hollow circular element and its rearward portion of relatively greater cross seciiion to electrically engage said circular she I.

In testimony whereof I have signed this specification this 9th dav of December 1918.

JAMES J. LODGE.

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