US1404114A - Refillable fuse - Google Patents

Description

REFILLABLE FUSE.

APPLICATION FILED SEPT. 12. 1919,

1 ,{104,1 14, Patented Jan. 17, 1922.

INVENTOR 9 w "3 b Ms attorn y,

UNITED STATES PATENT OFFICE.

REFILLABLE FUSE.

Application filed September 12, 1919.

To all whom it may concern Be it known that I, Gnonor. L. Gons, a citizen of the United States, residing at Buffalo, in the countyof Erie and State of New York, have invented certain new and useful Improvements in Refillable Fuses; and I do hereby declare the following to be a. full, clear, and exact description of the same, such as will l enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to figures of reference -marked thereon, which form part of this specification.

Like figures of reference refer to like parts.

This inventionrelates to enclosed refillable fuses.

One of the objects of this invention is to provide a refillable fuse having interlocked detachable ends with considerable surface contact between each terminal part and the ends of the fuse piece, so that the same can be readily taken apart either for examination or renewal of the fuse strip.

Another object is to provide a refillable fuse which is cheaply but strongly and durably made and one that can be easily and quickly taken apart and put together.

A further object is to provide a refillable fuse of such construction as will lend itself to the ordinary processes of production and manufacture.

Another object is to provide. a refillable fuse having simple and effective means to prevent fire from getting outside of the fuse casing.

A further object is to provide a simple and effective means of enclosing the refillable fuse.

Other objects of this invention will appear from a consideration of the specification and the drawings, which form a part thereof, in which two embodiments are illustrated.

In the drawings,

Figure 1 is a longitudinal section of a complete refillable fuse embodying my invention.

Figure-2 is an end View of the refillable fuse shown in Figure 1.

Figure 3 is a perspective view of the principal internal member of the fuse shown in Figure 1.

Figure 4 is a perspective-view showing one Specification of Letters Patent.

'16, the inner edges of which Patented Jan. 17, 1922. Serial No. 323,377.

of the terminal this fuse.

ferruled contacting ends of perspective view of one end of an assembled refillable fuse, such as shown in Figure 1.

Figure 6 is a plan view of a fusible connection between the terminals of the fuse, showing a contracted section in the center.

F igure 7 is a sectional elevation of a modified form of a refillable fuse showing another embodiment of my invention, differing from that shown in the other figures, in the construction of its ferruled ends.

Figure 8 is an end view of the fuse shown in Figure 7.

Figure 9 is a erspective view of one blade terminal end of the fuse shown in Figure 7.

Figure 10 is a perspective view of one of the ferruled ends of the fuse shown in igure 7, adapted to receive the terminal end shown in Figure 9.

In Figures 1, 2, 3, 4, 5 and 6, the form of fuse shown has a tubular casing 1, in the ends of which are the terminal pieces 2, of

.like construction, connecting which is the fuse piece 3, which is shown in Figure 6, having screw holes 3*, 3", and a central contracted portion 3* for fixing the position of the blowing point of the fuse. In threaded engagement with the terminal pieces 2, are screws 4, Whichalso pass into the body of the tubular casing 1 at the points 4, to lock the terminal pieces 2, longitudinally and rotatively within the casing 1. The tubular casing 1 has a longitudinal slot 5, for the passage of the fuse piece 3 and the fireproof strip 6, both of which are held on beneath the washer 7 by the screws 4, binding the same to the terminal pieces 2. The strip 6, is longer than the piece 3, and between the terminal pieces 2, itis bent upward to be spaced from the strip 3, which space, including thatbelow the strip 3, is filled with a fire proof powdered material 8.

Fitting around the casing 1 is a tubular envelope having two parts 9 and 10, conically fitted together at 11. Fixed to each of the outer ends of the tubular envelope parts 9 and 10, are ferrules 12, each having a covered end 13 comprising a central cross strip 14 and two depressed segments'15 and are spaced from the cross strip 14, while the plane of the segments 15 and 16 is parallel with the plane of the cross strip 14. The cross strip 14 has an extension 17, which isintegral with the segment 15, through-the shoulder 18. The

cross strip 14 has another extension 19,111

tegral with the segment 16, through the:

shoulder Abutting the underside of the cross strip 14 is the center of the blade 21,

the underside of the outer ends of which are, in surface-contact with the seginents'15 and 16." The blade 21 isiintegral withthe "body of the terminal 2,through the neck 22,

thereby spacing the blade 21, from the body of the terminal 2.

In the modified form of fuse shown in the 4 remaining figures, the tubular casing 1 is shown to be envelopedby the tubular parts '9 and 10 having a conical joint at 11. Eachof the tubular venvelope parts has a ferruled end 12, fixed thereto. Each ferruled'part 12 has a circular lip 12", integral withthe body of the ferrule 12, and each circular lip has an outstanding shouldered end 12. In bearing contact with the lips of the lips 12", and'brought against the 12 are the segmental flanges 23 of the terminal pieces 2 These flanges 23 are adapted to pass through the spaces 12 between the lips 12*, tobe removably positioned on top first sixfiguresfis. done as follows: Each terminal end 2, is fitted into the open ends of the tubularicasing 1, and is rotated to have the threaded hole register with the holes 4*, in the casing 1, which holes may be threadedor not, as desired. A portion of the powdered fireproof material 8 is next placed in the lower half'of the tubular casing 1, between the terminals 2, and the fusible strip 3 placed thereon through the slot 5, so

that, its holes 3 egister with the threaded 'screw holes in the terminals 2. More fireproof powder is nextadded to cover" the strip 3, and the fireproof'strip 6 is next put in place and the screws 4 with the washers 7, are positioned so'that in the turning of the screws 4, within the threaded holes of the terminal 2, all parts are bound together, and the screws 4, pass beyond the terminals 2, and enter the holes 4?. I

Next each envelope part 9 and 10 with it's ferruled end 12,'is slipped over the tubular casing 1, so that each blade 21, of the terminals 2, enters theslot between the segments 15 111161 16, and the'ferruled ends are pushed toward one another until each blade 21 comes in contact with the strip 14,.when the ferruled ends are turned in opposite directions so that each blade 21, by its quarter turn,--comes in contact with the shoulder 18 and 20 in lockedposition. The parts 9 and 10 of the envelope are then engaged in con tact at 11, and the fuse is complete and ready to be'inserted in the usual terminal clips, which engagethe ferruled ends 12. To remove the'ferrule'd ends 12 with the attached. envelope parts 9 and 10, the same are rotated through a quarter turn in theioppositedirection to which they were rotated to engage the shoulders '18 and 20, until each blade 21 registers again with the slot between the segments 15-and 16, when the ferruled ends 12, are in position to be withdrawn, and

by the removal of the screws 4, the stripf6 may be removed for replacing the fragmentary ends of the blown strip 3,-with a new strip. f. V

In the construction shown in: Figures 7:, S, 9 and 10, the manner of assembling the parts is similarto that shown in the other fi ures but instead of a blade 21 wvehave v flanges 23, which pass through spaces 12?, so that the flanges 23 contact the upper sides toward one another, thus holding these parts together and maintaining a forced contact between the flanges 23,-and the lips 12% If desired either the ferrules 12 01 the fiat member, having flanges 23,.may be made of insulating material to insure the insula- 1 of the lips 12", forcing the ferruled ends 12 tion of the ferrules from the terminal ends v i 2? carrying the blades 24 through which the current passes,

V Other-modifications of my invention may be devisedwithout departing from the spirit wish to be confinedto the two embodiments herein shown and described, hence I claim,

1. A refillable fuse, comprising a tubular member of insulating material, a terminal piece entering each end of said member, a

and scope of the same, I therefore donot 2. A refillable fuse, compr sing'a tubular member of insulating material, said tubular member having a longitudinal slot midway of its ends, a terminal piece entering each endof said member and extending, within, 7

beyondthe ends of said slot, a fusible strip releasably connecting. said terminal pieces within said member and adapted to pass said slot, a locking element oneach-terminal piece, a two-part envelope encasing said member, metallic means capping one end of each of the parts of the envelope, and a complemental locking element integral with each of said metallic means adapted to engage the aforesaid locking element.

3. A refillable fuse, comprising a tubular member of insulating material, a terminal piece entering each end of said member, a fusible strip releasably connecting said terminal pieces within said member, a locking element on the outside of each terminal piece including a tongue extendin transversely of the length of said mem er and spaced from the body of said terminal piece, a two-part envelope encasing said member, a metallic ferrule capping one end of each of said parts of the envelope, each ferrule having parallel portions forming the end thereof and spaced from one another to include said tongue in surface contact therebetween.

4. In a refillable fuse, including a supporting member, terminal ends, and a replaceable fuse strip, the combination with each of said terminal ends, of a locking part thereon, cap pieces fitting over said ends and completely enveloping said member, and a complemental locking part on each cap piece adapted and positioned to co-act with the locking part of the terminal end adjoining it.

5. A refillable fuse, comprising a long hollow member having a longitudinal opening on one side thereof, terminals entering each end of said member and extending within, beyond the ends of said opening, a screw having threaded engagement with each terminal transversely to said member,passing into said member, a fusible strip connected by said screws to said terminals, within the hollow of said member, a fireproof strip connected by said screws covering said fusible strip, outside terminal pieces releasably locked to said terminals, and a protected covering surrounding said member between said outside terminal pieces.

6. In a refillable fuse the combination with a tubular casing having terminal pieces, of a fusible strip connecting said pieces and partially enclosed by said casing, and a fireproof strip above and further enclosing said fusible strip.

7. In a refillable fuse the combination with a tubular casing having terminal pieces, of a fusible strip, a fireproof strip and means fastening said strips to said pieces and positioning said pieces in said casmg.

8. In a refillable fuse the combination with a tubular casing having a longitudinal slot intermediate its ends, of terminal pieces in said casing, a fusible strip fixed to said pieces and a fireproof strip between said fusible strip and the slot in said casing.

9. In a refillable fuse the combination with a tubular casing having a longitudinal slot intermediate its ends and a fuse supported by said casing, of a two part envelope removably secured to the ends of said casing and covering the slot therein.

GEORGE L. GORS.

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