US1335003A - Percussion-fuse - Google Patents

Description

S. KRUK.

' PERCUSSION FUSE.

APPLICATION FILED MN. 2-0. 1919.

Patented Mar. 30,1920.

STANLEY KRUK, F GLYMER, PENNSYLVANIA, ASSIGNOR 'IO KRUK PERCUSSION FUSE COMPANY, OF LATROBE, PENNSYLVANIA Specification of Letters Patent.

Patented Mar. 30, 1920.

Application filed January 20, 1919. Serial No. 272,087.

,Clymer, in thecounty of Indiana and State .of Pennsylvania, have invented certain new and useful Improvements in Percussion- Fuses; and I do declare the following to be.

a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same:

This invention relates to percussion fuses, and relates more particularly to certain improvements on the device covered by my Patent No. 1,232,814, issued July 10,1917.

One object of this invention is to greatly simplify the construction and minimize the cost of manufacture of articles of this character.

Another object is to greatly increase the efliciency or certainty of explosion upon being operated.

Another object is to materially increase the degree of safety and ease of operation.

Other objects and advantages may become apparent to persons whoread the following details of description in connection with the accompanying drawings in which:

Figure 1 is an elevational View. illustrating my improved percussion fuse connected to a rope or cord whereby it is operated.

Fig. 2 is an enlarged longitudinal sectional view of my improved percussion fuse.

Fig.8 is a transverse sectional view along the line 33 of Fig. 2.

Fig. 4 is a transverse sectional view along the line 44 of Fig. 2.

Referring to these drawings in detail, in which similar reference characters correspond with similar parts throughout the several views, the device comprises a tubular body 5 which is preferably gradually tapered toward one end and provided with an annular or radial flange 6 at its other end. A cap 7 having a peripheralinwardly ex 1 tending flange 8 engages with the flange 6- so as to securely unite the cap with the tubular body, and this cap is preferably concavo-convexed so that a space is providedbetween the inner parts of the cap 7 and flange 6. This provides oppositely disposed seats 9 on which a holding element 10 normall rests. This holdingelement 10-pr'ef- 'erab y comprises an end portion of a length of wire which extends through an opening 11 in the 'cap land may be attached to a rope or heavy cord as indicated at 12 in ig. 1 for a purpose hereinafter explained.

A plunger or striker 13 is apertured at 14 to receive the wire holding element- 10, the

latter being engaged with the plunger 13 at a point between the seats 9, and this engagement of the plunger with the holding element 10 also provides a seat for the upper end of aspring 15. The lower end portion of the plunger 13 is provided with oppositely extending studs 16 which pro- 'vide a seat for the lower end of the spring 15, and these studs or this spring seat-16 extends approximately to two opposite sides of the tubular body 5 so as to co-act with the said opposite sides in guiding the plunger in its path of movement centrally of the tubular body 5. The top of the cap 7 is provided'with. a central recess 17 in which the upper end of the plunger 13 rests and is held in the central position with relation to the tubular body 5.

Within the lower or constricted end of the tubular body 5 is secured a mass 18 of combustible or explosive material such as blasting gycerin or dynamite, and upon the top or inner surface of this combustible or explosive mass is secured a cap 18 of fulminatingmaterial which may be composed of nitroglycerin or other high explosive. An anvil or metal rod 19. has it major portion embedded in the explosive mass 18, a small end portion of the rod 19 extending into the 99.

fulminating cap and being united with the latter so as to more securely unite the ful-.

minating cap with the explosive mass 18.

In constructing a device of this kind, the

' rod or anvil 19 may be united with the fulminating material, prior to the assembling of the device, by touching one end of the anvil against a mass of fulminatin material so that a portion of the mass a ores-to the anvil, and the elements 18' and 19 become a unit so that excessive convenience and accuracy are assured in assembling the" device. The anvil or red 19 is disposed at the end of the .path' of movement of the striker 13, so that the latter will strike the 'fulminating cap adjacent to and directly over the end of. the anvil 19, thereb increasing the efliciency or certainty of t e explosion of the fulminating cap.

' In using this 'improved.percussion fuse,-

the same is embedded in a charge of powder, dynamite or other blasting material, the wire 10 extending out through the latter, and after the charge of blasting mate: rial is tamped in the usual manner, the rope is pulled with sufficient force to draw t e wire 10 through the aperture or opening 11 and out-of engagement with the striker 13; whereupon, the spring 15 expands until it is stopped by the cap 7, and the plunger or striker 13 is then impelled by the spring and guided by the lateral projections 16 to strike the fulminating cap directly over the upper end of the anvil 19. This causes the fulminating cap to explode, and its explosion causes the explosive mass 18 to explode and transmit its explosive force and heat to the charge of blasting material.

Because of the holding elementof the wire 10 being supported at two points, and the plunger 13 being supported thereby between these two points, the wire 10 may be relatively light and flexible as compared with that of my prior patent in which the plunger-holdin member is supported at one point only. fibviously, this relation of parts not only absolutely prevents the plunger from being accidentally released from its holder, but it also renders the'device more easily operated because of the wire 10 bein more flexible.

Although i have described this embodiment of my invention very specifically, it is not intended to limit this invention to these exact details of construction and arrangement of parts, but I am entitled to make changes within the scope of the inventive ideas disclosed in the foregoing description and following claims.

What I claim as my invention is:

1. A percussion fuse comprising a tubular body, explosive material in said tubular body, a spring-pressed plunger in said tubular body and operatable to strike said explosive material, and a length of wire normally supported by opposite sides of said body and engaged with said plunger belar body, anexplosive mass therein, a fulminating cap on said explosive mass, an anvil embedded at least partly in said explosive mass and united with said fulminating cap so as to constitute both an anvil and a secure anchorage for the fulminating material, and a striker in the tubular body and operatable to strike the fulminating cap at a point alined with said rod.

3. A percussion fuse comprisin a tubular body, an explosive mass therein, a fulminating cap on said explosive mass, an anvil embedded at least partly in said explosive mass and extending .into and umted with said fulminating cap, and thus securing the latter in position on the explosive body, and a striker in the tubular body and operatable to strike the fulminating cap at a point adjacent to the said anvil.

4. A percussion fuse comprising a tubular body having a radial flange around one end, a cap engaged with said flan e and closing said end of, the tubular body and being spaced from the tubular body to provide seats on opposite sides of said tubular body, a springpressed plunger in said tubular body, a holding member normally on said seats and engaging with said plunger between said seats and thus securely holding said plunger against the force of the plunger-spring, and explosive material in sition within said tubular body to be struc by said plunger, said holding member being movable for releasing said plunger and permitting its actuation by said plunger-spring.

In testimony whereof I have hereunto set 111 hand.

y I STANLEY KRUK.

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