US1186090A - Fuse-plug. - Google Patents

Description

JLH. HANSON.

FUSE PLUG. APPLICATION FILED JAN. 18. 1915."

' Patented June 6,1916.-

, iunrrnn sr rns PATENT OFFICE.

eTOHN H. HANSGN, 011 CHIGAGU, ILLINOIS, ASSTGNOR F ONE-THIRD TO $TEIPHEN H.

LOUGHMAN AND own-rum ro vran ALLAN, BOTH or cnroneo, rumors.

FUSE-PLUG.

1,1se,oso.

To all whom it may concern Be it known that 1, JOHN H. HANsoN, a

citizen of the United States, residing at a fuse plug embodying the features of my invention. Fig. 2 is a view of the inner end of the plug. Fig. 3 is a sectional view taken in the lane of dotted line 33 of Fig. 1. Fig. 4c is a perspective view of one of the terminals.

The body lot the lug may be of any 16- sired form and of any suitable matenal,

such, for example, as porcelain. Within the plugis a chamber 2 and a chamber 8, said chambers being separated by a part1- tion 4. lhe chamber 3 is adjacent to the inner end of the plug and is small as compared with the chamber 2. .For convenience of manufacture, the inner end portion of the'body is formed se" arate from the remainder of the body a consists of a cir- 'cular portion 5 fitting against the end of the remainder 1 of the body. The portion 5 is secured to the body portion 1 by means of the" usual screw-threaded conducting shell 6, The parts 1 and 5 are held against relative rotation by bosses 5 formed on the' part5 {and lying in. recesses 1 in the body portion, 1. The chamber 3 opens uponth'e upper side of the portion 5. The partition 4: is formed integral with the lower end of the bodyportion 1 The fuse element may be of any suitable character, such as fuse wire, fuse ribbon, or the like. Herein I have shown a fuse wire 7. Preferably, the fuseelement is removably securedin place so that when the ele ment is'melted by an excessive current it may be readilynteplaced. The outer end of the fuse elementli is herein shown as se cured by means of a binding screw 8% to a bracket 9 which is connected to the conducting shell '6.- A wall or portion 10 of the body 1 extends between the fuse element and the outer end of the bracket 9 and thus prevents an are formed within the fuse plug from reaching the exterior of the plug. As

Specification of Letters Patent. P 9111 9 1 J 111133 6, 1916, Application filed January 18, 1915. Serial at. are,

shown in Fig. 1, an inwardly projecting shelf or ledge 11 may be provided upon the wall 10 underneath the bracket 9.

The inner end of the fuseelement 7 is secured to a terminal 12 which is herein shown as consisting of a disk 13 having a tubular shank .1 1, said shank extending through an opening 15 in the body portion 5. The shank 14 extends into'the chamber 3. The terminal 12 is secured to the body 1 by means of angular lugs 16'formed out of the shank and lying within the chamber 3. In the disk 13 is formed a slot 17 to' facilitate the insertion of the fuse element 7. The inner end of the fuse element is intended to be bent around the shank 14: in the space between the disk 13 andthe inner end of the body. The chamber 3 is of sufficient size to permit axial movement of the shank 14 and the lugs 16 within said chamber, thereby permitting the fuse element to be compressed between the disk 13 and the -'inner end of the body when the plug is screwed firmly into its socket.

In the partition 4 is an opening 18 for the passage'of the fuse element. At the lower or inner side of the partition 4 the wall of the opening 18 is made rounding or flaring to facilitate the insertion of the fuse wire through the opening 18. Around the openingv 18 is an outwardly extending annular lip 19. The opening 18 is of such size and shape as to permit the fuse element to pass freely therethrough, but is not large enough to permit an arc to continue to exist between the inner end of the bracket 9 and the terminal 12. The partition 4 with its restricted opening 18 thus constitutes means to prevent the continued existenceof an arc in the fuse plug, and thus obviates danger of excessive current reaching the circuit which isprotected by the plug.

The outer end of the body 1 may be closed in any ordinary or preferred way. HcreimI have shown a screw-cap 20.

While I have described the present embodiment of my invention with considerable particularity, it will be understood that the,

invention is not limited to the precise form herein shown, but is subject to considerable modification within the scope of the annexed claims.

I claim as my invention: 1. In a fuse plug, in combination, a chambered main body portion having a transverse partition closing the inner end thereof, a separate inner end portion having a central opening therethrough, one end of which is enlarged and is closed by said partition, a

terminal device mounted in said opening and having a part engaging in said enlarged part of said opening, a terminal device on said main body portion, said partition having a restricted opening therethrough, and a fuse element passing through. said restricted opening and having its ends operatively connected to said terminal devices.

2. In a fuse plug, in combination, a main body portion having an internal chamber and having a transverse partition closing the inner end of said chamber, an inner end portion abutting against said body portion and having a chamber, said partition acting to separate said chambers, a shell securing said end portion to the main body portion, a terminal on said end portion, said partition havinga restricted opening therethrough, and a fuse element passing through said opening and attached at one end to said terminal, the other end of the fuse element being operatively connected to said shell.

3. A fuse plug comprising two separate outer and inner body portions of insulating material, a circumferential metallic shell securing said body portions together and adapted to be screwed into a socket, a terminal carried by the inner body portion to cooperate With a part in the receiving socket, a partition extending completely across the interior of the outer body portion and entirely separating such interior from the inner body portion, said partition having a restricted aperture therethrough, and a fuse connected at one end to said terminal and at portion, a terminal carried by the inner end I portion of the body, and a fuse element electrically connected to said terminal and terminal member and extending through the restricted opening.

5. In a fuse plug, a body comprising a main portion and an inner end portion, a screwthreaded shell securing said portions together, the inner end portion having a chamber and the main body portion having a chamber and also having a transverse partition integral With and closing its inner end, said partition having a restricted opening therein, a terminal carried by the inner end portionof the body, and a fuse element electrically connected to the shell and to said terminal and extending through the restricted opening.

In testimony whereof, I hereunto set my hand in the presence of two Witnesses.

JOHN H. HANSON.

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