US1094030A - Electric fuse. - Google Patents

Description

S. D. SPRONG & W. E. MUCOY.

ELECTRIC FUSE.

APPLICATION FILED SEPT. 6, 1912.

` '1,094,030' Patented Apr. 21, 1914 'UNITED STATES PATENT OFFICE.

SEVERN D. SPRONG- AND WALTER E. McCOY, OF NEW YORK, N. Y., ASSIGNORS OF ONE- THIRD TO FRANK W. SMITH, 0F NEW YORK, N. Y.

ELECTRIC FUSE.

Specicaton of Letters Patent.

Patented Apr. 21, 1914.

To all whomy it may concern.'

Be it known that we, SEvERN D. SPRoNo and "Anrrn E. McCoy, citizens of the United States. residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Electric Fuses, of which the following is a specification.

The invention relates to electric fuses, and provides a construction whereby with two circuits, including two fuses and the minivmum number of circuit terminals, the blowing of the fuse in one circuit will determine the rupture of the fuse in the other circuit: the saidconstruction comprising a U-shaped fuse strip, disposed in a suitable closed tube or casing, into which three circuit terminals, each of greater conductivity than said strip,

are led and directly connected respectively to the loop and ends of said strip.

In the accompanying drawings- Figure 1 is a longitudinal section of our electric fuse, and Fig. 2 is a similar view of a modification thereof. i y

Similar letters of reference indicate like parts. l

The fuse case A may be cylindrical and of any suitable material. The fuse strip B is .in loop or U-form with its arms a, b consimilar plug G at the opposite .5nd of the" case. When it is desired to bring they parallel arms a, b ofthe fuse strip nearer; togetherftlie` lterminals C, D mav be inclined towardv one another and carried through inl clined passages in a' supporting disk H of porcelain or similar material placed inside the case, as shown in Fig. 2.

Ve here showour fuse disposed in two mutually dependent circuits I, II, each including a generator, J and K. Circuit I includes generator J, terminals C, E and fuse arm u. Circuit II includes generator K, ter- Ininals D, E and fuse arm b. Then either fuse arm blows, it causes a rupture of the other arm by reason of its proximity thereto: so that while the two circuits are nor,- mally independent., any cause producing a blowing of the fuse in one'of them, will de termine a break in the kcontinuitv of the other'. l

IVe claim: j

1. An electric fuse, comprising a tube, a closure of insulating material at each end of said tube, one of said closures having two inwardly converging passages,two circuit terminals disposed in said passages, a single circuit terminal entering said tube through the other closure, and a Ushaped fusestrip having its loop connected to said single terminal and its ends connected respectively to said two terminals. f

2. An electric' fuse, comprising a tube, plugs of insulating material in the ends of said tube, a disk of refractory material in said tube and lavingginwardly converging passages,` two circuit terminals extending through one of said plugs and said passages, a single circuit terminal entering said tube through the other plug, and a U-sliaped fuse strip having its loop connected to said single terminal and its ends connected` to said two terminals.

In testimony whereof we have atlixed our signatures in presence of two witnesses.

SEVERN D. SPRONG. IVALTER MCCOY;

Vitnesses: y

Gnn'rnUoi: T. PORTER, Jol-IN DoHER'rY.,

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