US2141563A

US2141563A - Multiple fuse plug

Info

Publication number: US2141563A
Application number: US193138A
Authority: US
Inventors: Skojec William
Original assignee: ANDREW STROKA; PAUL SKOJEC SR
Current assignee: ANDREW STROKA; PAUL SKOJEC SR
Priority date: 1938-02-28
Filing date: 1938-02-28
Publication date: 1938-12-27
Anticipated expiration: 1955-12-27

Description

Dec. 27, 1938. w, SKQJEC 2,141,563

MULTIPLE FUSE PLUG Filed Feb. 28, 1938 30 'lI U/z'am Jim/'66 INVENTOR ATTORNEYS Patented Dec. 27, 1938 UNITED STATES PATENT OFFICE MULTIPLE FUSE PLUG ton, N. Y.

Application February 28, 1938, Serial No. 193,138

2 Claims.

This invention relates to multiple fuse plugs for insertion in the ordinary house lighting or other electric circuits.

An object of the invention is to provide a fuse 5 plug having a plurality of fuses adapted to be individually and successively brought into the circuit whereby the fuse plug need not be discarded upon the blowing of a fuse but may be used repeatedly until the fuses are all exhausted.

A further object is to provide a multip e fuse plug in which the fuse magazine is rotatably mounted exteriorly of the body of the fuse plug so as to be easily inspected and manipulated by persons unskilled in the electrical art.

A further object is to provide a multiple fuse plug which may be formed of a few strong simple and durable parts, which will be inexpensive to manufacture, and which will not easily get out of order.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawing forming part of this specification,

Figure 1 is a side elevation of a multiple fuse plug constructed in accordance with the inven-- tion and showing two fuse magazines applied to the body of the plug.

Figure 2 is an end elevation of the fuse plug shown in Figure 1 and showing one of the fuse magazines in front elevation.

Figure 3 is an enlarged cross sectional view taken on the line 3-4 of Figure 2 and showing the electrical connections of the fuses and showing the stub shafts upon which the magazines are rotatably mounted.

Figure 4 is a rear elevation of one of the fuse magazines showing the arrangement of the fuses therein.

Figure 5 is a rear elevation of a modified form of the invention.

Referring now to the drawing in which like characters of reference designate similar parts in the various views, l designates the body of the plug the same being provided with conventional prongs II and spring contacts I2 which are insulated from each other by insulating washers l3 and insulating tubes H, the latter forming supports for mounting studs ii on the sides of the body member, which studs form stub shafts for rotatably mounting the fuse magazines 16.

Contact screws H are connected to the prongs and contact screws 18 are connected to the spring contacts, the heads of these screws being located outside of and at opposite sides of the body member 10. The heads of the screws l1 and I8 of a prong and respective spring contact l2 on the same side of the body member ID, form means for connecting fuses in series circuit with the prong and the spring.

Rotatably mounted on each stub shaft i is a respective fuse magazine IS, the magazine being formed of insulating material, there being a disc having a recess l9 formed on the outer face and communicating with a plurality of circuitous grooves 20. Each groove receives a respective fuse 2| and the opposite ends of the fuse are exposed through openings 22 formed at the ends of the respective groove. Enlarged contact heads 23 are formed on the exposed ends of the fuse for engagement with the heads of the contact screws I1 and I8.

Springs

24 and 25 are mounted in respective circumferential grooves on each stub shaft I5. The spring 24 is sprung into a groove 26 in the axial opening of the magazine'while the spring 25 is disposed between the magazine and the side face of the body member l0. These springs rotatably mount the magazine so that the fuses may be successively moved into engagement with the heads of the contact screws as each fuse burns out.

A modified form of the invention is shown in Figure 5 in which a single fuse 21 is mounted in a magazine 28 which is formed of a bar of insulating material and is provided with a central opening 29 to receive one of the stub shafts l5 and is also provided with a spring ring 30 to rotatably hold the magazine on the shaft. The magazines of the type shown in Figure 5 are designed for use as a spare to replace a multiple fuse magazine when multiple fuse magazines are not available.

In the preferred embodiment of the magazine the recess I9 is closed by a transparent pane 3| which is held in place by a split ring clamp 32 engaged in a groove 33 formed in the wall of the recess.

From the above description it is thought that the construction and operation of the invention will be fully understood without further explanation.

What is claimedis:

1. A multiple fuse plug comprising a plug body,

prongs and spring contacts in the body forming circuit terminals, means insulating a prong and a respective spring contact from each. other, contact screws connected to the prongs, contact screws connected to the spring contacts, all of the screws having heads located outwardly of and at opposite sides of the plug body, fuse magazines rotatably mounted on said sides of the body, a plurality of fuses arranged in a circuitous manner in each magazine and each terminating exteriorly of the magazine in contact ends adapted to bridge the contact screw of one of the prongs and its associated spring contact for connecting the prong and the spring in series circuit, and studs projecting from the sides of the plug body upon which said magazines are rotatabiy mounted, rotation of the magazines on the studs advancing the fuses successively into circuit closing position when a fuse burns out.

2. A multiple fuse plug comprising a plug body, prongs and spring contacts in the body forming circuit terminals, means insulating a prong and a respective spring contact from each other, cons,141,sea

tact screws connected to the prongs, contact screws connected to the spring contacts. all of the screws having heads located outwardly of and at opposie sides of the plug body, fuse magazines rotatably mounted upon said sides of the body. a plurality of fuses arranged in a circuitous manner in each magazine and each terminating exterior-1y of the magazine in contact ends adapted to bridge the contact screw of one of the prongs and its associated spring contact connecting the prong and the spring in series circuit, studs proiecting from the sides of the plug body upon which said magazines are rotatably mounted, rotation of the magazines on the studs advancing the fuses successively into circuit closing position when a fuse burns out, and split ring springs on the studs engaging the magazines for properly positioning the magazines for rotatably mounting the magazines at a predetermined distance from the fuse plug body to assure good electrical con- 8 tact of the fuses with the contact screws.

WILLIAM SKOJ'EC.