US839519A

US839519A - Electrical switch and socket-key.

Info

Publication number: US839519A
Application number: US30128806A
Authority: US
Inventors: Herbert L Smith
Original assignee: SIEMON HARD RUBBER CORP
Current assignee: SIEMON HARD RUBBER CORP
Priority date: 1906-02-15
Filing date: 1906-02-15
Publication date: 1906-12-25
Anticipated expiration: 1923-12-25

Description

No. 839,519. PATENTED DEC. 25, 1906. H. L. SMITH.

ELECTRICAL SWITCH AND SOCKET KEY.

APPLIGATION FILED FEB.15,1906.

WITNESSES l/VlQf/VTQH 4 films. W W 4551/ ,4 TTORNE Y unirnn STATES manna caries.

HERBERT LQ SMITH, OF BRIDGEPORT, CONNECTICUT. ASSIGNOR TO THE SlEMONsHARD RUBBER CORPORATION, OF BRIDGEPORT, CONN ECTICUT, A CORPORATION OF CONNECTICUT.

ELECTRICAL SWETCH AND SOCKET-KEY.

Specification of Letters Patent.

Patented Dec. 2 5, 1906.

Application filed February 15, 1906- Serial No. 301,288-

To all whom it may concern:

Be it known that I, HERBERT L. SMITH, a citizen of the United States, residing at Bridgeport, county of Fairfield, State of Connecticut, have invented a new and useful Electrical Switch and Socket-Key, of which the following is a specification.

This invention has for its object to provide electrical switch and socket-keys which shall be simple and inexpensive to produce, neat and attractive in appearance, which may be molded from either a vulcanizable or a nonvulcanizable compound, and which shall be so constructed as to render breakage of the keys and twisting of the keys off from the mandrels or shanks practically impossible under the ordinary conditions of use.

Heretofore it has been the practice to fiatten the key ends of the mandrels before molding the keys thereon. Keys made in this manner, however, have not proved satisfactory, owing to the fact that unless made from averytough compound, they were liable to break easily if dropped and broke frequently in use, and, furthermore, that no matter from what kind of a compound they were molded they frequently became loose and turned on the mandrels or shanks, thus rendering the keys useless and requiring that new ones he provided.

My present invention wholly overcomes these objections and enables me to provide electrical switch and socket -keys which, owing tothe peculiar construction of the inner ends of the Inandrels or shanks, may be molded from relatively inexpensive compounds, thus effecting a great saving in the cost of production and producing keys that are neat and attractive in appearance, will not break easily when dropped, will not break under the ordinary conditions of use, and cannot turn or become loose on the mandrels or shanks.

With these and other objects in view I have devised the novel switch and socket-key of which the following description, in connection with the accompanyings drawing, is a specification, reference characters being used to indicate the several parts.

Figure 1 is an elevation of an electrical switch. or socket-key embodying my novel improvement Fig. 2, a section of the key in the direction of its greater dimension, showing the mandrel in side elevation; and Fig. 3

i is a section at right angles to the section-line in Fig. 2, showing the split in the key end of the mandrel and the manner in which the rections in the plane of the cut, as clearly.

shown in Figs. 2 and 3, the out being indicated by 12 and the separated parts of the end of the mandrel by 13. Having pre ared the mandrels by splitting the ends and ending the parts outward in o posite directions in the plane of the cut, t e key is molded thereon in the usual manner. Owing to the fact, however, that the separated parts of the end of the mandrel extend Well outward into the wings of the key, as clearly shown in Fig. 2, it is rendered impossible for the key to turn on the mandrel in use and practically impossible for the key to break, even when dro ped or when subjected to the hardest kind of usage.

The bending outward of the split parts of the key in the plane of the cut, as described, results in the portion which extends into each wing being only one-half the thickness of the portion which forms the stem or shank. Therefore the wings of the key can be very thin, and still not result in exposure 'ofthe edges ofthe outwardly-bent portions of the reinforce.

Having thus described my invention, I claim- Switch and socket-keys comprising a man'- drel having the key end split and the parts thereof bent outward in opposite directions in the plane of the cut, and a key formed from a suitable compound and molded thereon, the separated parts of the end of the mandrel extending well outward into the wings HERBERT L. SMITH.

Witnesses A. M. VVOOSTER, S. W. Arnnnrou.