US2930277A

US2930277A - Combination blasting tool

Info

Publication number: US2930277A
Application number: US678316A
Authority: US
Inventors: Fred W Jennerman
Original assignee: Individual
Current assignee: Individual
Priority date: 1957-08-15
Filing date: 1957-08-15
Publication date: 1960-03-29
Anticipated expiration: 1977-03-29

Description

March 29, 1960 F. w. JENNERMAN COMBINATION BLASTING TOOL Filed Aug. 15, 1957 uvwzzvron. was

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States Patent ice ' by bolts 19 between the free or forward end portions of V The present invention relates to .new and useful 'improvements in blasting tools for use particularlyby dynamiters and has for its primary object to provide ii 1 fa single implement novel means for expeditiously splitting and cutting fuses, crimping caps, opening wrappers and punching holes or depressions in sticks of dynamite.

Another important object of the invention is to provide, in a manner as hereinafter set forth, a combination blastingtoolof the. aforementioned character wherein asingle blade accomplishes the fuse splitting and cutting operations. I L

Still another important object of the invention is to provide .a combination blasting tool of the character described comprising commonmeans for crimpingcaps and adjustably controlling the operating depth of the aforementioned blade when splitting fuses.

Other objects of the invention are to provide a combination tool of the character set forth which will be comparatively simple in construction, strong, durable, compact, of lightweight, highly efficient and reliable in use and which may be manufactured at low cost.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in wh ch:

Figure 1 is a view in side elevation of a tool constructed in accordance with the present invention;

Figure 2 is a plan view of the device;

Figure 3 is a view in vertical longitudinal section through the tool;

Figure 4 is a view in transverse section through the forward end portion of the device, taken substantially on the line 4-4 of Figure 3; and

Figure 5 is a view in transverse section through an intermediate portion of the tool, taken substantially on the line 5--5 of Figure 3.

' Referring now to the drawing in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a pair of elongated metallichandles 6 and 7 of substantially 'U-shaped cross section. The

handles 6 and 7 are crossed and pivotally connected at one end, as indicatedat 8. I

Formed integrally with the pivoted end of the handle 6 is a pair of forwardly projecting, spaced arms 9 which terminate in outwardly offset, apertured free end portions 10 having a fuse holder 11 secured therebetween by screws 12. The holder 11 includes a block or body 13 of suitable material having mounted longitudinally therein a longitudinally split tube 14 for the reception of an end portion of a fuse. The block or body 13 is further provided with a longitudinal slot 15 which communicates throughout its length with the split tube 14. Formed integrally with the block or body 13' on opposite sides of the slot 15 is a pair of flanges 16. The forward end portions of the flanges 16 are provided, adjacentthe block or body 13, with notches or recesses 17 for the reception of a fuse to be cut off.

'the arms 18-is 'a blade 20 which extends slidably into the holderll between the flanges 16 for engagement with a fuse in the tube 14 or in the notches 17. The handles 6 and 7 are opened by a spring 21 mounted between the pivotally connected end portions of said handles for re- =.tracting the blade 20. A bolt 22 extending between the flanges 16 is engaged in an arcuate slot 23 provided therefor in the blade 20 for limiting the travel of said blade under the influence of the spring 21.

Also mounted on the free end portions of the arms 18 and projecting in the opposite direction from the blade 20 is a-substantially U-shapcd guide 24 for'the reception .of a stick of dynamite to be unwrapped. The guide 24 comprises duplicate arcuate'half sections 25 provided with mounting flanges 26 secured by the bolts 19 between the blade 20 and the arms 18. The outer end portion of the blade 20 is notched or recessed as 'at 27 (see Figure 3.) for the reception of a knife 28 which projects into the 'guide 24 for cutting the wrapper on a stick of dynamite.

A bolt 29 in the guide flanges 26 secures the knife 28 in the notch or recess 27.

A fuse criiriper 30 is provided at an intermediate point on the handles 6 and 7. The crimper-3tl includes an anvil 31 secured at 32 in the handle 7 between plates 33. The anvil 31 comprises an inwardly projecting portion 34 (see Figure 3) having a substantially U-shaped notch or recess 35 therein for the reception of a cap to be crimped. The spaced plates 33 also project inwardly beyond the handle 7 and have formed therein substantially U-shaped notches or recesses 34 which are aligned with the notch or recess 35 for the reception of the cap.

The crimper 30 further comprises a substantially U- shaped saddle 36 which is fixed longitudinally on the back of the handle 6. Extending slidably through the saddle 36 and the bight portion of the handle 6 is a threaded shank or shaft 37. Fixed on the inner end of the threaded shank or shaft 37 is a substantially U- shaped jaw 38 which is adapted to straddle the projection 34 for engagementwith the anvil 31 and which, further, is engageable with a cap ;in the notches or recesses 35 and 34 for crimping said cap in conjunction with said anvil. Engagement of the jaw 38 with the anvil 31 also limits the movement of the handles 6 and 7 toward each other, thus regulating the travel of the blade 29 toward 7 saddle 36.

' Secured longitudinally at 42 in the free end portion ,Of the handle 7 and projecting rearwardly therefrom is a punch 41 for forming holes or depressions in a stick of dynamite.

It is thought that the use of the tool will be readily apparent from a consideration of the foregoing. Briefly,

vious manner. To cut a fuse off to the desired length, said fuse is inserted in, the notches or recesses 17 in the flanges 16 and the handles 6 and 7 are again closed,

To crimp a cap, said cap is inserted in the anvil 31 and. the handles 6 and 7 are closed for engaging the jaw 38 with said cap. As hereinbefore stated, by adjusting the jaw 38 on the handle 6 through the medium of the

elements

39, 37, 40, etc.', the depth of the blade 20 when splitting a fuse in the holder 11 may be controlled. To remove a wrapper from a stick of dynamite, the stick is engaged in the substantially U-shaped guide 25 and moved longitudinally therein for causing the knife 28 to split said wrapper. The punch 41 may now be brought into use for forming a hole or depression in the dynamite stick for the reception of the cap.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A blasting tool comprising a pliers-like body having jaws forwardly of the pivot and handles rearwardly of the pivot, means on one of said jaws for longitudinally accommodating a fuse, a blade on the other jaw engaging and penetrating said fuse accommodating means for splitting a fuse upon movement of the jaws toward each other, adjustable stop means on the handles for gauging the movement of the jaws toward each other and determining the depth of the split formed in the fuse, bifurcated fuse holding means on said one jaw closer to the blade than said fuse accommodating means and extending transversely thereto, said wfuse holding means in alignment with said blade for cutting off a length of fuse upon closing movement of the jaws, means on said said blade and engaged with said fuse holding means for limiting the open movement of said jaws, said stop means including cap crimping means having an anvil on one handle and an adjustable crimping jaw on the other handle in alignment therewith so that crimping of the cap takes place when the handles are moved toward each other, said crimping jaw being adjustably positioned a distance from said other handle such that the anvil abuts thereagainst when the blade has penetrated the fuse ac commodating means to the desired depth.

2. The combination of claim 1 wherein said fuse accommodating means includes a longitudinally split tube.

3. The combination of claim 1 wherein said open movement limiting means includes an arcuate slot in said blade and a pin secured to said fuse holding means extending into said slot.

References Cited in the file of this patent UNITED STATES PATENTS 527,132 Teel Oct. 9, 1894 610,305 Mino et al Sept. 6, 1898 1,431,421 Prince Oct. 10, 1922 1,529,857 Yourek et a1 Mar. 17, 1925 1,552,495 Mohr Sept. 8, 1925 2,127,378 Vorhies Aug. 16, 1938