US2072290A

US2072290A - Automatic ejecting fuse

Info

Publication number: US2072290A
Application number: US78044A
Authority: US
Inventors: Heinz P Bauman
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-05-05
Filing date: 1936-05-05
Publication date: 1937-03-02
Anticipated expiration: 1954-03-02

Description

March 2, 1937. H. BAUMAN AUTOMATIOEJECTING FUSE Filed May 5, 1936 2 Sheets-Sheet 1 1nvnior h. 2 3a a/77a/7 By 22mm A itorneys H. P. BAUMAN AUTOMATIC EJECTING. FUSE March 2, 1937.

Filed May 5, 1936 2 Sheets-Sheet 2 A iio rneus Patented Mar. 2, 1937 UNITED STATES PATENT OFFICE 2,072,290 AUTOMATIC EJECTING FUSE Heinz P. Bauman, Detroit, Mich.

Application May 5, 1936,

1 Claim.

This invention appertains to new and useful improvements in fuses and more particularly to a novel device wherein the fuse is ejected automatically.

5 The principal object of the present invention is to provide a device in the form of an automatic fuse which when blown results in the automatic ejection of the whole fuse cap, thus indicating immediately to the attendant which of a group of 10 fuses has blown.

Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:-

15 Figure 1 represents a side the device.

Figure 2 is a longitudinal sectional view.

Figure 3 is an end elevational view of the plug portion of the structure.

Figure 4 is a section on the line 4-4 of Figure 3.

Figure 5 is an end elevational view of the cap portion of the fuse.

Figure 6 is a section on the line 6-6 of Fig- 25 ure 5.

Figure 7 is a perspective view of the fusible element.

Referring to the drawings wherein like numerals designate like parts, it can be seen that 30 numeral 5 generally refers to the plug section of the fuse, while numeral 6 generally refers to the cap section of the fuse.

The plug section 5 consists of a body 1 of insulation having the thread formed annulus 8 35 thereon. At one end of the body I is the insulation plate or disk 9 in which the contact I is mounted.

Extending into the body I from the opposite end thereof are the pockets Il-ll in which the 40 '.U-shaped spring contacts l2 are mounted, one of which is connected with the thread-formed conductor annulus 8 and the other with the contact Ill.

The cap section 6 includes the body l3 of in- 45 sulation and in this body the contact prongs M are suitably anchored and allowed to project a elevational view of Serial No. 78,044

substantial distance beyond one side of the cap so as to engage into the U-shaped spring contact I2 of the plug section 5. The cap I3 is formed with a pocket Hi from the back wall of which projects the stub I6 around which the coiled compressible spring I! is disposed with one end impinging against the back wall of the pocket IS. The opposite end of the spring bears against the circular intermediate portion l8 of the fusible element I!) which is secured by soldering, welding or other method or means at its end to the contact prongs l4-l4. The fusible element l9 has the flanges 20-40 around the free edge portion of the central portion l8 thereof to assist in properly guiding or retaining the spring l1.

It can now be seen that with the sections -6 assembled in the manner shown in Figure 2, any rupture of the fuse l9 will free the spring l1 and it will exert its tension against the fuse and against the section 5, thus throwing the entire cap l3 away from the plug section 1. Thus at a glance, an attendant can tell which one in a group of fuses is blown.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having thus described the invention what is claimed is:-

A fuse plug of the character described compris ing a plug section, a cap section, said plug section being provided with pockets, contacts in the pockets, contact prongs on the cap section adapted to engage into the pockets and with the contact in the said pockets, a fusible element connected at its end to the contact prongs, and a coiled compressible spring interposed between the cap and the fuse normally held compressed by said fusible element, said fusible element having a circular central portion provided with a peripheral flange within the confines of which one end convolution of the spring is normally located.

HEINZ P. BAUMAN.