US2513128A - Safety fuse tool - Google Patents

Description

June 27, 1959 J, w T r AL 2,513,128

' SAFETY FUSE TOOL Filed Sept. 26, 1944 gr zQoyaZ J 14 7475 facu LyZZe Patented June 27, 1950 omre- STATES 1 Claim.

The object of our invention is to provide a novel and effective Safety Fuse Tool which can take over all of the operations of preparation of powder, fuse and primer cap prior to blasting. In the past it has been necessary to use a crimper, knife, and a pointed instrument to accomplish what this single tool will do, with attendant saving of time.

We attain the object of our invention b the device illustrated in the accompanying drawings in which:

Figure l is a side elevation of the invention in closed position with a portion of the tool broken away and shown in vertical section;

Fig. 2 is a side elevation of the tool in open position;

Fig. 3 is a erspective view of the tool in open position with a portion of the handles broken away to save space;

Fig. 4 is a longitudinal section of a section of powder which has been punched by the handle =4;

Fig. 5 is a detailed view of the fuse end which has been split at lb by our tool;

Fig. 6 is a detailed view of the fuse showing where it has been cut squarely apart by our tool; and

Fig. '7 is a side elevation of the primer cap crimped to the fuse by our tool.

Referring to the accompanying drawings, we provide a plyer-like tool consisting of pivotally connected plyer-like members. On the main operating end of the tool, we provide a flared tube I into which the fuse end is inserted for slitting. Inwardly of the tube I, we provide an arouate notch 2 into which the fuse lc may be placed for cutting off. We also provide the opposed smaller curved notches or recesses 3 into which the primer may be placed for crimping, one of the notches or recesses forming the crimp 3a and the opposed notch or recess functioning to form the crimp 3b as shown in Fig. 7. On the end of one of the operating members of the tool is mounted the knife blade 1 secured by screws a as shown in Fig. 2. Knife blade 1 slits the fuse. It also functions to cut off the fuse when the fuse is placed in the notch or recess 2. Guards 5 are offset on either. side of the knife blade 1 and engage around the tube 1 when the tool is operated to its closed position, thereby guiding and reinforcing the cutting operations. Furthermore, as illustrated, the notch 2 is grooved transversely of its length,.as at 9, Figs. 1 and 3, to receive the knife and to guide and reinforce the cutting operations.

Referring to Fig. 4, element 41) is the powder in which a hole has been made by inserting the pointed end 4 of one of the tool handles. As shown in Fig. 6, 2a indicates the squarely cut off end of a fuse after it has been placed in notch 2 and operated on by the knife 1.

The tool is of plyer-like design and is comprised of two major units. One-half is a plyer handle Whose jaw section is extended into a flared tube l whose inside diameter is approximatel 4-inch and whose length is approximately five/eighths inches. The handle section of this half is reduced to a blunted point. Just below tube l and still within the jaw section are the notches 2 and 3, the upper of which is used to hold the fuse while it is being cut apart and the lower notches 3 of which are used for crimping the primer cap. Tub l-l has a slot la as shown in Fig. 3, to receive the upper portion of the cutting blade I. The other half of the implement is a plyer handle whose jaw section is used to support the knife I and its guards 5 and to carry a notch 3 corresponding in size and shape with the notch 3 of the opposed jaw. As the blade 1 is mounted to the plyer jaw by means of the screws 5a, it can be removed and sharpened when desired. The guards 5 extend downwardly only to "a, point slightly above the notch 2 so as not to interfere with the fuse. The guards 5 eifectually prevent injury to the user of the plyer, and, as illustrated, guide and reinforce the several cutting operations.

In operating the tool the fuse is laid in notch 2 and severed by the lower portion of the knife 7 which passes through the slot Ia of tube and through the fuse resting in notch '2.

To crimp the primer the tool is opened and the primer cap 8 is placed in notches 3 and the jaws then closed producing the crimp 3a, 3b.

To slit the fuse for the spitting, its end is inserted in the tube, and jaws of the tool are closed. The knife 1 enters the slot la and passes through the fuse parallel to its length making the slit lb as shown in Fig. 5.

To puncture the powder, the pointed handle 4 is inserted in 4a. The primer "8 and fuse lc are then inserted in the powder at ia and the work is completed.

What we claim is:

A safety fuse tool, comprising a pair of pivotally connected plyer-like members, the jaw of one of the members terminating in a tube, the tube having a centrally positioned slot extending longitudinally through a portion of its length from that end thereof which is adjacent the pivot connection, the jaw of the other member carrying a longitudinally positioned blade adapted to enter said slot and centrally split a fuse inserted in the tube, said blade extending farther toward the pivot connection than does the tube, a curved notch extending transversely of the first-named jaw and within the cutting range of the said blade extension, said notch being grooved transversely of its length to receive said blade extension, whereby the same blade may be used to both split and cut off a fuse, each cutting structure guiding and reinforcing the other for its particular cutting operation, and a pair of overhanging guards secured to the second-named jaw at opposite sides thereof in spaced parallel relation to said knife. ROYAL J. WRIGHT..

JACK LYTLE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 287,159 Poole Oct. 23, 1883 610,305 Mino et a1.v Sept. 6, 1898 I 847,923 Elliott Mar. 19, 1907 1,732,676 Erbele Oct. 22, 1929 2,127,378 Vorhies Aug. 16, 1938

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