US1212694A - Fuse. - Google Patents

Description

UNITED STATES PATENT OFFICE;

ALF SCHAANN'ING am) STANLEY 'AUSTEN s'riGA'N'r, or MANCHESTER; ENG AND,

ASSIGNORS TO WESTINGHOUSE-ELECTRIC AND MANUFACTURING COMPANY, A

CORPORATION OF PENNSYLVANIA.

. FUSE.

and useful Improvement-in Fusesfo fwhich the following a specification.

Our invention relates to fuses for-pro tecting electric circuits'and particularly to fuses of the horn type that are designed, primarily, for the protection of the hightension windings of transformers;

One object of our. invention is to provide an improved fuse that shall be particularly suitable for use in outdoor installations,the device being unaffected by rain, snow, sleet or ice.

Another object of our invention is to provide a fuse of the above indicated character having means whereby the replacing of a broken fusible conductor may be easily effected.

According to our invention, the device comprises a central member of insulating material, preferably porcelain, to the ends of which metal pieces, having convergingdiverging arcing horns thereon, are attached by suitable clips. A. fusible conductor or wire is attached to the said metal pieces by winding the same around the arcing horns at the narrowest part of the gap therebetween. The metal end pieces are provided with hollow conical portions by which the entire device is supported on the upwardlyextending portions of two L-shaped rodsconstituting the terminals of the circuit to be protected, said rods being carried by suitable insulators. The hollow conical portions are provided with downwardlyextending portions constituting V-shaped notches that so engage the horizontal portions of the supporting rods as to guide the device while it is being placed in position.

In the accompanying drawings, Figure 1 is a side view, partially in section and partially in elevation, of a protective fuse device embodying our invention, and Fig. 2 is a sectional Vl(5\V" tl1kI1 on the line IIII of Fig. 1.

In Fig. 1 of the drawings, the central por-' Specification of Letters Patent.

Patented J an, '16, 1917.v

Application filed December 2, 1916. Serial No. 134,630.

tion of the devicecompri'ses a, porcelain in sulator lof bobbin-shape, having cylindrical ends Metal members 3 are provided with semi-circular portions 4 to which caps "5 are so secured by bolts 6 as to grip the cy- Arc" ing-horns T are secured in sockets 8 in the. Juetal members 5 and are maintained in the same vertical plane by fins or guides 9 on the metal member's 3.

lindrical portions :2 of theinsul-ator.

v A fusible wire or condi'rctor 10 is secured, at ts ends, to the members 3 by screws and nuts 11 and is so wrapped around the arcing horns 7, as-indirated at the points 12, as to open thearc gap at itsnarrowest'part. The members?) are provided withhollowconical portions or cups lfi that are adapted to engage the upwardlyexteiiding portions-'01 legs 14 of L-shaped rods, the horizontal portions 15 of which are clamped between the two halves of caps 16 that are mounted on insulators 17 which, in turn, may be supported from a-suitable bar 18. The rods 15 con- 7 stitute theterminals of the fuse device, and the circuit to be protected may be connected to the ends thereof in any suitable manner.

The hollow conical portions 13 are provided with downward extensions 19 constituting V-shaped notches that, when the device is to be placed in position, engage the horizontal portions 15 of the rods and cause the insides of the cones 13'to engage the points of the upwardly, extending portions of the rods 14, by which means the device is guided to acorrect position in which the plane of the arcing horns 7 is substantially vertical. By this construction, the central portion is made completely self-alining.

WVhen it is desired to replace a broken fusible conductor the entire device is removed from the supporting rods 15 in order that the fusible conductor may be replaced at leisure and without danger of shock. Another advantage is that an isolating switch for disconnecting the device from the line is not required. F or the removal and subsequent replacement of the device an insulating pole of wood or other suitable material having a spring clip, the jaws of which are adapted to engage the central part 1,.may be employed, thereby making it unnecessary to touch the fuse device.

Our invention is not limited to the partieular structure illustrated as it maybe variously modified without departing from the spirit and scope of the invention as set forth in the appended claims. 7 We claim as our invention:

1. The combination with an insulator having a conducting cup member mounted on each end thereof, of horn members opera-tively connected to the cup members and aclapted'to receive a fusible conductor."

2. The combination with stationary terminal members, of an insulator having a conducting cup at eachend thereof to receive the stationary terminal members, and means for securing a fusible conductor to the said cups.

3. The combination With stationary terminal members, of an insulator of substantially bobbin shape, a conducting cup secured to each end of the insulator having means for receiving the said terminal memhers, a horn member secured to each of the conducting cups, and a fusible conductor connected between the horn members.

4. The combination with upwardly extending terminal members, of conical conducting cups for receiving the terminal members, an insulating member for securing the cups together, horn gap members secured to the said cups, and a fusible conductor secured to the horn gap members.

5. The combination withtwo stationary insulators, and upwardly extending Contact members mounted thereon, of an insulating member having horn gap members mounted thereon, and means secured to each-end of the insulating member whereby the horn gap members are maintained in ja predetermined position and in electrical connection gvith the upwardly extending contact memers'. r

6. The combinationwwith stationaryterhorn gap members, a fusible com uctor connected between the horn gap members, and

means for guiding andseouring the horn gap members in efiective engagement with the stationary terminalmembers.

In testimonywhereof We have hereunto subscribed our names this thirteenth day of November, 1916.

ALF SCHAANNING. STANLEY AUSTEN STIGANT. Witnesses: V

FREDERICK NIXON, J. S. PncK.

minal members, of an insulatin member,

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