US1337806A - Inclosed non-arcing refillable fuse - Google Patents

Description

A. A. WELLS.

iNCLOSED NON-ARCNG REFILLABLE FUSE.

APPLICATION man MAY 24, 1919.

1,337,806. Patented Apr. 20, 1920.

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ALBER'I'A. WELLS, OF DETROIT, MICHIGAN.

` INCLOSED NON-ARCING REFILLABLE FUSE.

Application filed May 24, 1919.

T0 all 'whom it mag/.concern "Be it knownthat'I, ALBERT A. VELLs, a citizen of the United Staes, and a resident of Detroit, county of /Yfayne, and State of Michigan, have invented a new and Improved ,Inclosed Non-Arcing Refillable Fuse, o f which the following is a full, clear, and vexact description.

This invention ielates to fuses, and in particular to a fusible fuse plug of the arc extinguishing type.

An'object of the invention is to provide a fuse plug which will extinguish and choke the flame or arc incident to the fusing of the current conducting material. Tt is also an object of the invention to provide indicating means for showing that the fuse has been blown and no longer conducts current.

Further, itis an object and purpose of my invention to provide a fusible plug withl the aforesaid characteristics which will be comparatively simple in structure, inexpensive to. manufacture and convenient in application therewith.

TWith the above and other objects in view the invention has relation to a certain combination and arrangement of parts, an e5;- ample of which is described in the following specification, pointed out in the appended claims, and illustrated 1n the accompanying drawings, wherein:

Figure 1 shows an elevational view of the fuse.

Fig. 2 shows an end view thereof.

Fig. 3 shows an elevation of the fuse with rthe end caps removed therefrom.

F ig. 4 shows an end view of Fig. 3.

Fig. 5 shows a longitudinal sectional view of the fuse plug, the sectional view being taken upon the line 5 5 of Fig. 2.

Fig. 6 shows a sectional view taken upon the line 6 6 of Fig. 5.

Fig. 7 illustrates a sectional view taken upon the line 7 7 of Fig. 6.

Fig. S shows a sectional view taken upon the line 8 8 of Fig. 5.

Fig. 9 shows a sectional view of the circuit conducting plug, the view being taken upon the line 6 6 after said fuse element has been fused and the parts have moved into an arc quenching engagement one with the other.

Referring more in particular to the drawings, the numerals 1 and 2 designate a pair of body sections semi-cylindrical in cross section, and placed together to form an ap- Speeication of Letters Patent.

Patented Apr. 20, 1920.

Serial No. 299,424.

proximately cylindrical fuse member. One of the body sections is provided with a groove which gradually slopes downwardly from the plane toward the cricumference of the body. The other body section is provided with an aperture or slot 4 which opens into the slot 8.

The body sections are placed together with the plane faces thereof adjacent one another, and with a fusible ribbon 5 interposed between said sections. The fusible ribbon turns down at each end as shown at 5a, and lays adjacent the ends of the body sections. A leaf spring 6 is interposed between the sections, and preferably will lie in contact with the section 2 and against one surface of the fusible ribbon. Dowel pins f' are employed for holding the body sections in .fixed position and for maintaining the leaf spring and fusible ribbon in relatively correct position. The free end of the leaf spring has fixed thereto an arc barrier plug 9. This barrier plug is provided with an upper wedge shaped end which conforms in shape and size to the walls forming the aperture .4. The barrier plug is provided with a pin 10. The upper end of the pin is sharpened and adapted to puncture a strip of paper 11 which is pasted or otherwise secured to the body section to cover the aperture 4. The arc barrier plug' is provided with a groove or channel upon either side of the pin. The fusible ribbon is provided with an aperture for receiving the wedge shaped extremity 12 of the barrier plug. rThe fusible ribbon is reduced in size at the barrier plug so that the ribbon will burn out or fuse at that point.

End caps 14 are placed over the assembled body sections which securely hold said sections together.- A screw 15 is screw-threaded into one of the body sections and securely engages the metal cap 14 with the turned down end of the fusible ribbon. The caps 14 provide the circuit terminals of the fuse plug and are adapted to engage a standard form of fuse block. The fuse plug will be inserted in the fuse block and withdrawn in the usual manner.

When the fusible ribbon becomes overly heated due to an excess iow of current therethrough, the ribbon fuses at the point of greatest resistance, which is adjacent the barrier plug. This causes the tension of the spring 6 to plunge the barrier plug forwardly into the aperture 4. This sudden action on the part of the barrier plug immediately breaks the arc, and eifectually smothers it out since the barrier plug shoulder 12 snugly fits the walls forming the aperture 4. The pin 10 punctures the paper strip 1l and indicates that the fuse has been blown, whereupon it is removed and a new plug inserted.

After the fusible ribbon has blown or melted out and thus opens a circuit in which the fuse is inserted, the plug may be removed and refilled. The refilling is accomplished by removing the screws l5 and end caps 14, after which the two body sections will be separated and a new fusible ribbon 5 inserted therein. Thus this form of fusible plug may readily be renewed.

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

1. A fusible plug, comprising in combination; a pair of body sections, joined together with a fusible ribbon inserted therebetween, a leaf spring carried within one of the body sections, a barrier plug carried by the leaf spring and pressing against the fusible ribbon.

2. A fusible plug, comprising in combination; a pair of body sections, joined together with a fusible ribbon inserted therebetween, a leaf 'spring carried within one of the body sections, a barrier plug carried by the leaf spring and pressing against the fusible ribbon, and a puncturing pin provided to indicate that the fuse has been blown.

3. A fusible plug, comprising in combination; a pair of body sections placed together, with a fusible ribbon inserted therebetween, a leaf spring, a barrier plug carried on the leaf spring, a strip of paper placed over an opening formed in one of the body sections, and a pin provided to be plunged through the paper when theplug fuses.

4. A fusible plug, comprising in combination; a pair of body sections joined together with an aperture formed in one and a slot formed in the other, a leaf spring with one end thereof fixedly disposed between the body sections and the other end thereof being free to move within the slot, a barrier plug mounted on the free end of the leaf spring adapted to close the opening in one of the body sections, and a fusible ribbon disposed between the body sections holding the barrier plug out of the opening.

5. A fusible plug comprising, a piece of insulating material provided with a deep elongated slot formed therein, a leaf spring with one end fixed to the insulating material, a barrier plug mounted on the free end of the leaf spring, a fusible ribbon applied to the insulating material and having an opening formed therein to permit a portion of the barrier plug to project through said fusible ribbon, another piece of insulating material provided with an opening placed over the fusible ribbon and having an opening to receive the projecting portion of the barrier plug.

ALBERT A. WELLS.

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