US1537296A - Safety fuse - Google Patents

Description

Patented May 12, 19725.

ADDISON F. GEABHART, (3F

AC'DUNN, l.VEST VIRGINIA.

SAFETY FUSE.

Application filed Hay 5, i922.

To @ZZ whom t may concern:

Be it known that I; ADDISON F. Gunn- LHART, a citizen of the United States, residing at MacDunn, in the county of F ayettev and State oil/Vest Virginia, have invented new and .useful Improvements in Safety F uses, of which. the following is a specitication.

This invention relates to safety appliances, particularly to fuses for interposition in current carrying lines and has for its object the provision orp a novel fuse device which instead of being attached stationarily to a portion of the machinery with which it is associated is interposed or connected in the cables and suspended thereby.

An important object is the provision of a device of this character which is adapted for use in carrying current or" any strength desired and which is equally well adapted foruse vin connection with either direct current lines or alternating current systems.

Another object is the provision of a device of this character which includes a supporting block formed of separable sections between which areclamped a plurality of similar terminals to which the fuse wires are attached, these terminals being let into the block so asto have a firm seat therein to provide the necessary strength to permit the device to be used in suspended relation.

An additional object is the provision of a device of this character which will be simple and inexpensive in manufacture, elticient and durable in use, a. great safe guard to life and property, and a general improvement in the art.

VVith the above and other objects and advantages in view the invention consists in theV details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in which:

Figure l is a plan view of the device,

Figure 2 is a plan view with one section of the block removed,

Figure 3 is a cross section on the line 3-3 of Figure'l,

Figure d is a cross section on the line 4`4 of Figure l and -Figure 5 is a section on the line 5 5 of Figure 1.

Referring more particularly to the drawings I have shown my device as comprising a block 10 formed of suitable insulating Serial No. 558,816.

material and constructed in two similar sections il, held together by transverse bolts l2 having their heads i3 recessed into one section and having their other ends carrying nuts let located within recesses 15 in the other section. The nuts carry handle members 1GA by means oit which they may he rotated to effect assembling` or disassembling of the device without the employ` ment of any tools.

The sections 11 are formed with a pluralit-y of spaced mating semi-cylindrical longitudinally extending channels 17 near the ends of which are formed rectangular recesses 18. Associated with each channel are two metallic terminal members each of which includes a rectangular head 19 titting within the recess 18 and terminating in an extension 20. Carried by the entensions 20 of each pair of terminals are pins 2l to which are secured the ends ot the fuse wire 22. The carrying capacity of the fuse wire must necessarily depend upon the nature of the current used in driving the machinery with which my device is associated and the capacity may be as great or as little as may be found desirable. Each terminal further includes an elongated cylindrical extension 23 project-ing beyond'the end of the block and formed with a socket 24 for the reception of the current carrying wire 25 which is held in place as for instance by means of a set screw 26.

Assuming that the device has been constructed and assembled as above described and as shown in the drawings, it is apparent that it will operate electrically in the same manner as any other fuse but it is to be noted that it possesses the great advantage of being capable ot interposition in the current carrying' cables of mining machines, electric locomotives, street railway cars and also in electric lighting or other systems. Owing to the fact that the various terminalsy are let or mortised into the sections of the block it is apparent that the device is capable of withstanding a severe endwise pull so that it may be dragged along without causing any injury to the structure and without danger of causing disconnection of any of the wires. It is to be observed that the device is equally well adapted for use in taking care of alternating or direct current and that when used in connection with direct current in case one fuse wire burns out the cables may be switched to one of the 0 longitudinally into angular recesses, a

' Y remaining fuse Wires so that Whatever machinery is protected by the device may' b e Y continued in operation Without anyappreci-Y able delay. Y Y

Fronithe, foregoing description and a studyof theV drawings it will be apparent that I have thus provided an extremely simple and consequently inexpensive safety fuse for alltypes of currents and in which reneWal'of a burnt out fuseV maybe accomplishedin a very easy manner Sand Without the employment of any :tools Whatever. As the device is "so simple it is Vapparent that there is nothing `to get out of `order and that itsh'ouldlthus zhave alonglife `and satisfac- Asections detachably secured together, said 'sections being formed Withspaced parallel extending semicylindrical leading .near their ends 'mating 'passages pair of Vterminals VV1,537,296 Y associatedk with each ypassage :andiincl'uding Y an angular head engaged Within the angu-V Y' lar recesses and further including a reduced extension projecting beyond the'end of the j' block for connectionwith current carrying Wires, anda fuse Wire connected With each pair of terminal members.y

2. A device of the character described comprising a block formed in sections detachably secured together, said blockV being formed kof insulating material and having each section Iprovided with a longitudinal y channel of semi-'cylindrical formation, the

channels mating to define a cylindrical bore, Y

the block being formed at the ends 'offthe bore with yangular recesses frnating'to define sockets, terminals held between-the sections of the block'and'eacli formed With an angular head enga-ged Withinnthe socket and A further formed with a 'reduced plate like tongue ventering the bore and carrying a securing element, Veach terminal lmember further having an outwardly extending portion projecting beyond -the end of the block and having a Wire receiving socket inter- 'sected by `a clamping screw 'for yeffectingV connection, `and a fusel Wire extending Wlithinthe bore with `its ends Wrappedeabout said securing elements.

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InA testimony whereof I yailix my signaf n MDD130s;per;Annan-T. H

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