US1773983A

US1773983A - Magazine fuse

Info

Publication number: US1773983A
Application number: US210926A
Authority: US
Inventors: Foo Lee Sing
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-08-05
Filing date: 1927-08-05
Publication date: 1930-08-26
Anticipated expiration: 1947-08-26

Description

2 Sheets-Sheet l &\\\\\\\\\\\\\\\ MAGAZ INE FUSE l.. s. Foo

Filed'Augs, 1927 mi l Aug. 26, 1930.

(4NI z l 1 lNvENToR ATTORNEY L S. Foo

MAGAZINE FUSE Filed Aug, 5' 1927 nl? a a INVFENTOR Z Sz.

ATTORN EY s. s E N w W Patented Aug. 26, 1930 PATENT oFFicE LEE SING F00, 0F MANCHESTER, NEW HAMPSHIRE MAGAZINE FUSE This invention relates to a magazine fuse, the object being` to provide a device which will feed a plurality of cartridge fuses in position to maintain a distribution circuit indefinitely. Devices of this kind have heretofore been provided but are commonly made of flexible fuse wires fed from a reel and which on blowing of the fuse can be unreeled a suficient distance to restore the integrity of the distribution circuit. My invention, however, differs from devices of this kind in providing a magazine fuse holder attachable toa fixture mounted on the wall of the house or station and which, on blowing the fuse, will auto'- matically `permit ejection of the blown fuse and its replacement' by another from the magazine, this operation being continuous for a plurality of overloads of the consumption cir.- cuit and may then be rendered of further use by a new supply of cartridge fuses. The fuse casing is formed of an insulating holder in which a plurality of fusesmay: be consecu-v tively lowered into engagement with a circuit terminal by which any fuselowered by a compression spring may be brought into circuitclosing .position automatically when the blown fuse is ejected. The magazine, the walls of which are of suitable insulating material, as indurated fiber, carries imbedded wires by .which the circuit is automatically completed, when a fresh fuse is pushed'by the spring into engagement with the circuit closing terminal. i

The invention therefore, in' its broader phase, involves a magazine fuse containing a plurality of cartridge fuses having a compression spring driving them toward the open end, and circuit closing detents at the open end by which they blown fuse may be discharged automatically and a fresh fuse in stalled in its place. It comprises other features, the novelty of which will be more fully hereinafter described and will be definitely indicated in the appended claims.

In the drawings-illustrating the invention: f Figure 1 is a vertical sectional view taken through the device forming the subject matter of the present invention, and illustrating parts in elevation.

`Figure 2 1s a partial vertical sectional view Application filed August 5, 1927'. serial No. 210,926.

taken through the fuse magazine or holder, with parts in elevation and in ydotted lines.

Figure 3 is a horizontal sectional view taken through the fuse magazine or holder.

Figure 4 is a sectional view taken through the fuse magazine or holder adj acentthe top thereof with the cover for said holder re'- moved and showing a fuse and other parts in elevation. l,

Figure 5 is a horizontal sectional view taken through the support strip and showing thev upper socket or bracket terminal in section.

Figure 6 is a detail view of the upper hook.

Figurek 7 is a perspective view of an angle bracket which forms a art of the invention, for securing thel cover o the fuse' magazine or holder in closed position. f Y

Figure 8 is a similar viewk of the upper bracket terminal.

Figure 9 is a similar view of onecontact member for the fuses.

Figure 10 is a similar View of the other contact member. Y

Referring to they drawings in detail, the reference numeral l indicates a supporting strip of fiber slate o r other suitable insulating material adapted to be secured in any wel-l known manner to the wall of a building or the like, and secured to the strip by set screws is a bracket terminal 2 which includes a folded clip 3 for the purpose of accommodating one end of a conductor 4, and the bracket terminal also includes a substantially rectangular shape socket member including side walls 5 and 5a and a front wall slotted' longitudinally to provide spaced'

portions

6 and 6 as clearly shown in 4`igure 8 of the drawings. The socket is adapted to receive the finger of a U-shape support or hook 7 which is secured to one of the end walls of a fuse magazine or holder 8 in a manner as clearly shown in Figure l. 'The hook 7 is secured to the end Wall by set screws, anda bracket terminal 2L similar to the bracket terminal 2 is mounted ad'- jacent the bottom of the wall to cooperate with a hook 7a similar to the hook 7, the hooksf' andi'a being received in the rectangularportions of thebracket terminals.

The fuse maga-zine or holder is rectangular in shape as best shown in Figure 3, and is formed from insulating material. One side wall of the holder is provided with a vertiially arranged groove or recess ot arch cross sectional shape and this recess is indicated by the reference numeral 9. Formed in the opposite side wall is a vertically arranged 10. rectangular in cross section, the recess 9 forming a vertical guide tor the rounded boss on one oi the ends ot the cartridge fuses as shown, and the groove 10 forms a guide tor the posts 1.2 oi the fuses.

The fuse holder is provided with a cover 13 which when in closed position applies pressure to the fuses 1% through the medium of a spring means which will be presently described, and the cover has depending thererom adjacent the ends thereof flan; 15 and Cdecrire-tl to the underside ot the cover through the medium ot rivets or the lilie is one end portion of a looi` ed spring 1G which has secured to its opposite or lower end, a plate 17 having` tlangos curved to follow the curvature oi the fuse 1i as best shown in liigure 2 of the drawings.

Secured to the end wall which carries the hooks 7 and in is a spring contact member 18 that is arranged adjacent the bottom ot the last mentioned end wall and includes a spring linger disposed in the path of the post 12 of the fuses as clearly shown in Figure 1.

ln order to retain the cover in closed position, the ilano'e 15 is provided with an opening that reg sters with a similar opening in the other wall of the fuse holder, and these registering openings receive a pin 19. Cooperating with the pin 19 is an angle plate 18 that includes a short arm 19 adapted to be received in a. slot formed in the flange 15.

The structure of the fuses is clearly shown in Figure 1, and each of the tu not only include a post 152, but likewise include a fusible neel; 2O of a crossv section according to the required amperage. Formed with each ot the ends of the neel-z are conical shape por tions 21 and Q1, the portion 2l has .termed tl erewith a guide Q?, trom wh` 'h entends the post 1i?, and the guide is ol a s. vto snugly lit within the casing of" the fuse hutl is mounted tor slidable movement therein. D "posed about the portion Q3 ot the post l2 is a coil spring 2l that has one ot its oud con.olution:-:

ne while its opposite end a plu@ lo which -i'loscs f and extending one ot the em s ot rvhe trom diametricallv opposite sides ot the plug ...tl as well as a gif-ortion ot' the 'fuse having iownecl therewith the portion Q1 and the boss 11 are pins which are received in the casing as shown. By this construction, it will be obvious that when the neck hecomes broken, the coil spring '224i will urge the post 12 out ot engagement with respect to the linger of' the spring contact 1S. rlhe casings of e is may be formed from .fiber or similar ng material. The spring contact 1S is secured to the 'fuso holder by set screws which likewise secure the hooks l thereto as clearly shown in Figure 1.

It will be apparent therefore that when the cover is removed the cartridges may ho dropped into the casing and when the cover is applied the pressure of the spring 1G will force the bottom ruse into engagement with the spring le and the copper or brass terminal 2T wl h is secured to the front wall ol the magazine by one or more set screws 2S. In the walls o'l`r the magazine are mounted a metallic strip which may be done in process ot formation or mounted on the outside thereof but in any :vent terminates in metallic continuity with the brass or copper terminal Q7. The metallic strip 29 is in metallic continuity or engagement with a transverse metallic stri p 29 which terminates in contactwith the upper hool; 7, whereby there is me tallic contiiiuity hetween the terminal Q, the hook T, the wires QS). 29 to the bottom terminal 27. Consequently, when the cartriiilgcsI are stacked in the tuse ma y izine and the cover applied, the bottom cartridge is automatically forced into engagement with the terniinals 1S and 27 so that the lfuse is placed in circuit with one conductor l and the corresponding opposite conductor 4i" of the circuit. On overloading ot the circuit the narrow neel( Q0 ot the fuse gives away by melting and the spring 24 causes the terminal to leave the spring 1S and automatically drop away lrom the magazine, whereupon the pres,` ire of the spring 1G drives a new cartridge fuse into its seat between the spring 1S and the terminal 2T, thereby renewing the integrity ot the circuit. Sin'iilarly this operation will continue as long as spare cartridge fuses are supplied to the magazine.

lllhile I have shown a certain specific 'form ot construction. it is obvious that modifications of the holder and its support may he made without departing V'rom its scope and is only limited hy the terms olt the appended. claims.

Having thus described my invention, what I claim as new and desire to secure by lietters Patent is:

l. ln a luse magazine holder. a strip of iusulating material, bracket terminals includin' clips 'tor receiving condurtors and being secured to thv strip. :in open bottom holder, cartrie e 'l'nscs adapted to hc received in said holder. hoot; secured to said holder and detachably received h v said bracket terminals, a cover for said holder, means 'for securing said cover in operative position, a spring having one end secured to said cover, an arched hot`- tom piece secured to the opposite end ot said spring and engageable with an adjacent cartridge fuse, spring contact having connection with one hook and secured in said casin in the path of posts ot the cartridge fuses, a terminal secured in the holder in opposed direction With respect to the spring contact and arranged in the path of the cartridge fuses, and metallic means completing a circuit between the other hook and the said ter- 5 minal.

2. A magazine fuse device comprising a strip ol insulating material, means secured to said strip and receiving conductors, a cartl ridge fuse holder, means secured to said holder and received by the first mentioned means whereby the holder s supported with respect to the strip, cartridge fuses adapted to be received in said holder said holder havin reccssed sides for guiding the cartridge uses l for movement therein, a cover for said holder, a coil spring secured to said cover, an arched bottom piece secured to said coil spring for engagement with an adjacent cartridge fuse for urging said cartridge fuses through said holder, a spring contact secured in said holder in the path of cartridge fuse posts, said spring contact being electrically connected with one conductor through the medium of a portion of the holder supporting means', a

terminal arranged in opposed relation With respect to the spring contact, for engagement with the cartridge fuses, metallic means em bedded in said holder for electrically connecting the terminal with the other conductor through the medium of the remaining portion of the holder supporting means, said holder having an open bottom, and resilient means included in said cartridge fuses for the purpose specified.

3. A magazine fuse device comprising a strip of insulating material, conductor receiving means secured to said strip a cartridge fuse holder, means secured to said cartridge fuse holder and supported by the conductor rcccivin g means for securing said holder With respect to said strip, cartridge fuses including casings and adapted to be mounted in said holder, enlarged terminals included in each cartridge fuse, a metallic post for each cartridge fuse, a plug having a post passing therethrough, a coil spring surrounding the post and engaging the plug and one of said terminals, contact means arranged in said holder and being bridged by one of the cartridges fuses, one of said contact means being in electrical connection )Vith one conductor, metallic means electrically connecting the other contact mea-ns with the other conductor, and. a coil spring for urging the 53 fuses in contact with said contact means.

`1n testimony whereof I aiX my signature.

LEE SING FOO.