US1794710A

US1794710A - Refillable fuse

Info

Publication number: US1794710A
Application number: US291039A
Authority: US
Inventors: John H Hickey
Original assignee: Hickey Fuse & Manufacturing Co
Current assignee: Hickey Fuse & Manufacturing Co
Priority date: 1928-07-07
Filing date: 1928-07-07
Publication date: 1931-03-03
Anticipated expiration: 1948-03-03

Description

March 3, 1931. J. H. HxcKEY 1,794,710

REFILLABLE FUSE Filed July 7, 1928 INVENTOE.

Patented Mar. 3, 1931 UNITED STATES PATENT OFFICE JOHN H. HICKEY, OF SAN FRANCISCO, CALIFORNIA, ASSIG-NOR TO HICXEY FUSE MANUFACTURING COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF CALIFORNIA REFILLABLE lUsE Application filed July 7,

l@ tion is to provide a retillable fuse of simpliied and improved construction.

Another object is to provide an improved fuse wherein the terminals are readily removable to receive a new fusible element and which will facilitate the reassembly of the fuse.

A further object is to provide an improved construction which will edectually seal the ends of the fuse casing.

Another object is toprovide an improved device which is simple and positive in its .action and which will permit the fuse to be refilled repeatedly.

A still further object is to provide an improved construction which can be manufactured economically and which is durable and efficient in service.

I accomplish these and other objects by means of the improved device disclosed in the drawings forming a part of the present application wherein like characters of reference are used to designate similar parts throughout the specication and drawings and in Which Fig. 1 is alongitudinal section of my improved reiillable fuse;

Fig. 2 is a side elevation, partly in longitudinal section of the fuse, the view being shown in a position at right angles to the position shown in Fig. 1;`

Fig. 3 is an end elevation of the fuse;

b Fig. 4 is a plan view of the clamping memer; y I

Fig. 5 is a plan view of the'alining plate;

Fig. 6 is a plan view of a modifiedy form wherein the 'clamping plate is secured to the alining plate; and

Fig. 7 is a transverse section of the modified form, taken upon the line 7-7 of Fig. 6 in the direction indicated.

192s. serial No. 291,039.

lReferring to the drawings, the numeral 1 is used to designate a cylindrical casing threaded at both ends, as at 2..

Terminal members

3 and 4 are mounted within the ends of the casing, said terminals consisting of annular iange portions having inwardly extending

lugs

3 and 4 and outwardly extending

blade portions

3 and 4 respectively.

The terminal member 3 is provided with an annular shoulder 6 arranged to seat upon the end of the casing 1. A lug 7 is formed upon the shoulder to engage a recess formed in the end of the casing to dene the normal operative position of the terminal. A collar 8 is threaded onto the end of the casing `1 and provided with an inwardly disposed flange 9 arranged to seat against the terminal 3 to hold the terminal member seated in sealing relation to the end 0f the casing.

The terminal member 4 is movable through the casing 1, the flange portion being received within the end of the casing. An alining plate 11 having an annular shoulder 12 is arranged to seat upon the end of the casing 1 adjacent the terminal 4, a lug 13 being formed upon the shoulder 12 to engage a recess formed upon the end of the casing to aline the terminal in respect to the opposite terminal 3.l The plate 11 is provided with a slot 14 ary ranged to slidably receive the outwardly extending blade 4 Wherebythe plate 11 may be moved into proximate relation to the iange portion of the terminal 4.

A clamping member 16 having a slot 17 arranged to slldably engage the blade 4 is mounted in proximate relation to the alining plate 11.` Arcuate recesses 18 are formed in the center of the member 16 to permit the member 16 to be rotated upon a reduced portion of the blade 4 formed by notches 19 formed in the sides of said blade portion. Inclined surfaces 21 are formed upon the outer side of the member 16 to be received Within the notches 19, the outer sides of the notches being inclined to correspond to the surfaces 21. The member 16 may lit loosely/onto the outer end of the terminal 4 and against the' aliningplate 11, or if desired, pins 22 may be aranged to extend RHSSUED through arcuate slots 23 formed in the memmember 16 maybe held irmly seated upon the plate 11 and said plate 1-1 in turn held firmly seated upon the end of the casing.

A suitable fusible element 27 is secured between the inwardly extending

lugs

3 and 4 by suitable securing members 28 in the well known manner. v

In operation, the fuse is assembled by securing the fusible element 27 between the

lugs

3 and 4 and then inserting the terminal 4 and the fusible element through the casing until the terminal 3 is seated upon the end of the casing. The collar 8 is then threaded .onto the end of' the casing to clamp the terminal firmly against the end of the "casing, the collar being tightened to efectu al:

ly seal the end of the casing and prevent the escape of gas around the ends of the terminal. The lug 7 defines the position of the terminal relative to the end of the casing.

After the collar 8 has ,been applied, the alining plate 11 is moved onto the outwardly extending blade portion of the terminal 4 and is seated upon the adjacent end of the casing 1, the lug 13 being moved to engage its recess in the end of the casing to aline the terminal 4 with respect to the opposite terminal 3. The clamping member 17, which may be either applied separately or linked to the plate 11 by the pins 22 as above described, is then turned to cause the inclined surfaces 21 to enter the notches 19. As the clamping member 17 is turned, the inclined surfaces act as wedges operating to press the plate 11 and the terminal 4 tightly together. The collar 24 is then applied and tightened to press they late 11 against the end of the casing. The cl mping member 17 insures a close Contact between the plate 11 and the adjacent surfaces of the terminal 4 and the member 17, and the collar 24 efectually secures and seals the closure across the end of the casing.

A s thus assembled, the fuse is used in the ordinary manner. When the fusible element 27 is to be replaced, the fuse is taken apart by removing the collars8 and 24, and a new fusible element applied as above described and the fuse reassembledl for further use.

The clamping member insures a gals-tight closure, and, being positioned upon the outer s1de of the terminal and alining plate, is unaected by gases or metal projected from the fusible element when blown.

The specific details of construction may of course be modified in numerous ways without departing from the spirit of my invention, and I therefore desire to avail myself of all modifications which may fall within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Let- 1. A refillable fuse comprising a casing; terminal members arranged to engage the ends of the casing; a fusible element connected between' the terminalv members; a collar detachably securing one of the terminal members upon the casing; clamping means detachably clamped upon the opposite terminal member and seating upon the adjacent end of the casing; and a collar de- Aeo tachably securing the clamping means upon the end of the casing. j

2. A rellable fuse comprising a casing; terminal members arranged to engage the ends of the casing; a fusible element connected between the terminal members; a collar detachably securing one of the terminal members upon the casing; a plate engaging the opposite terminal member and seating upon the adjacent end of the casing; clamping means rotatably mounted in proximate relation'to the plate and having means for detachably clamping said plate in engagement with the terminal memberand a collar detachably securing the plate and clamping means upon the end of the casing. y

3. A refillable fuse comprising a casing; terminal members arranged to engage 'the ends ofl the casing; a fusible elementconnected between the terminal members; a collar detachably securing one of the terminal members upon the casing; an alining plate engaging the opposite terminal member and the adjacent end of the casing; a clamping member mounted in engagement with the alining plate and rotatably movable relative thereto to engage notches formed in the terminal member for clamping the terminall and the plate together; and a collar engaging the end of the casing and detachably securing the Aplate and clamping member upon the end of said casing.

4. A refillable fuse comprising a casing; terminal members arranged to engage thel ends of thecasing; a fusible element connected between the terminal members; a cap detachably securing one of the terminal members upon the casing; an alining plate engaging the opposite terminal member and lthe adjacentend of the casing; a clamping member mounted in engagement with the alining plate and provided with inclined surfaces arranged to engage notches formed in the terminal member to clamp the terminal and plate together; and a collar engaging the end ofthe casing and detachably securing the terminal and alining plateupon the end of the casing.

5. A refillable fuse comprising a casing; terminal members arranged to engage the ends of the casing; a fusible element connected between the terminal members; a col-v lar detachably securing one of the terminal members upon the casing; an alining plate slotted to engage the opposite terminal and arranged to seat upon said terminal and the adj acentfend of the casing; a clamping plate mounted in proximate relation to the alining plate and rotatably movable relative thereto, said clamping plate having inclined surfaces arranged to engage notches formed in the terminal to clamp the terminal and plate together; and a collar engaging the vend of the casing anddetachably securing the terminal and alining plate upon the end of the casing.

6. A refillable fuse comprising a casing; terminal members arranged to engage the ends of thevcasing, said members each comprising an annular flange having inwardly extending lugs and outwardly extendin blade portions; a fusible element connected between the inwardly extending lugs; a collar detachably securing the flange portion of one terminal member against one end of the casing; an alining plate slotted to fit over the blade of the opposite terminal member and arranged to seat upon the adjacent end of the casing; clamping means rotatably mounted in connection with the alining plate and movable to clamp said plate and the terminal flange together; and a collar detachably securing the alining plate and clamping means against the end of the casing.

7. A refillable fuse comprising a casing;

terminal members arranged to engage the ends of the casing, said members each comprising an anular flange portion having inwardly extending lugs and outwardly extending blade portions; a fusible element connected between the inwardly extending lugs; a collar detachably securing the flange portion of one terminal member seated against one end of the casing; an alining plate slotted to fit over the blade of theopposite terminal and arranged to seat upon the adjacent end of the casing; a clamping plate rotatably mounted upon said blade in proximate relation to the alining plate, said clamping plate having inclined surfaces arranged to engage notches formed in the blade for clamping the terminal member and the alining plate together; and a collar detachably securing the alining plate seated against the adjacent end of the casing.

8. ln a refillable fuse having a easing and terminal members detachably secured upon the ends of said casing, an alining plate arranged to seat upon one end of the casing, said plate being slotted to receive a terminal member; and a clamping plate mounted in proximate relation to the alining plate, said clamping plate being rotatably movable relative to the terminal member and alining plate and having inclined surfaces arranged to engage notches formed in the terminal member for detachably clamping the terminal member land the alining plate together.

9. In a refillable fuse having a casing and terminal members detachably secured upon the ends of said casing, an alining plate arranged to detachably engage a terminal member andto seat upon one end of the casing; and a clamping plate rotatably mounted upon the terminal member in proximate relation to the alining plate and. provided with inclined surfaces engaging notches formed in the terminal member for clamping the terminal member and alining plate together.

10. In a refillable fuse having a casing, a terminal member having a flange fitted within an end of the casing; an alining plate seated upon the end of the easing, said plate being slotted to slidably engage the terminal member; and a clamplng member mounted in proximate relation to the outer surface of the aliningplate, said clamping member being rotatably movable relative to the plate' and terminal member and having means movable into clamping engagement with notches formed in said terminal member to clamp said member and the alining plate together.

11. In a refillable fuse having a casing, a terminal member having a flange fitted within an end of the casing; an alining plate seated upon the end of the casing, said plate being slotted to slidably engage the terminal member; and a clamping member mounted upon the terminal member in proximate relation to the outer surface of the alining plate, said clamping member being rotatablyimovable and having inclined surfaces arranged to engage notches formed in the terminal member to clamp said member and the alining arranged to engage a recess formed 'in the end of the casing to aline said plate and terminal with the opposite terminal; and a clamping plate slidably and rotatably engaging the outer end of the terminal member and provided with inclined surfaces arranged to engage notches formed in said terminal member adjacent the alining plate for clamping said plate and the terminal member together.

13. ln a renewable fuse, the combination of a tubular fuse body, a terminal blade arranged to extend through the end of said body, an abutment on said terminal blade eX- tending outwardly from the sides ofthe -5 blade, the blade being provided with a restricted neck outside of said abutment, a slotted Washer arranged to be slipped do'wn over the terminal blade to rest against the abutment and close the end of the fuse body, a Y u, sealing disk having a central aperture enlarged at diametrically opposite points to permit the disk when turned into one position to be slipped down over the blade and v fest on the washer, said disk being then ro- 1,-, tated relative to the washer to clasp the re-` y stricted neck of the blade, and seal the ends of the slot of the washer, and means separate from the sealing washer for clamping the disk against the washer and the washer against the end of the fuse body. i,

14. In a renewable fuse, the combination of a tubular fuse body, a terminal blade arranged to extend through the end of said body, an abutment on said terminal blade extending outwardly from the sides of the blade, the blade being provided with a restricted neck outside of said abutment, a slotted washer arranged to be slipped down Y over the terminal blade to rest against the abutment and close the end of the fuse body, a sealing disk having a central aperture enlarged at diametrical y opposite points to permit the disk when turned into one position to be slipped down'over the blade and rest fm on the washer, said disk being then rotated relative to the washer to clasp the restricted neck of the blade and seal the ends of the slot of the washer, and an annular cap arranged to be screwed on the end of the fuse 40 body to clamp the disk to the washer and the washer to the end of the fuse body.

In witness whereof, I hereunto set my signature.

J OHN H. HICKEY.