US1091878A

US1091878A - Waterproof blast-cap-charge protector.

Info

Publication number: US1091878A
Application number: US72029012A
Authority: US
Inventors: James M Cordray
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-09-13
Filing date: 1912-09-13
Publication date: 1914-03-31
Anticipated expiration: 1931-03-31

Description

\ J. M. GORDRAY.

' WATERPROOF BLAST GAP CHARGE PROTECTOR.

APPLIUATION FILED SEPT. 13, 1912.

Patented Mar. 31, 1914.

JAMES M..CORDRAY, F LOSANGELES, CALIFORNIA.

. WATERPROOF BLAsT-cAr-onAnGE rno'rncron.

Specification of Letters-Patent.

I a-tented Mar. 31, 1914.

Application fiied September 13,,1912. "Serial No. 720,290.

To all whom it may concern Be it known that I, JAMES M. OonoRAY, a citizen of the United States, residing at Los Angeles, in, the county of Los Angeles and State of California, have inventedcertain new and useful Improvements in Water proof Blast-Cap-Charge Protectors, of which the following is a specification.

This invention has asits object to provide a device for use in protecting blast charges so that when disposed in place they will not be liable to be affected by moisture.

It is a well-known fact that in mines and quarries the ground surface upon which the blast must be disposed in order to secure the proper results, is frequently damp, or even wet, and an unprotected blast if disposed upon such ground will either be rendered totally useless in that it cannot be discharged, or the effect of its discharge will be paired.

The present invention therefore, as stated, contemplates the provision of a device for protecting a blast charge and fuse, or cap, by means of which it is to be set off.

Another aim of the invention is to provide a device for the purpose stated which will be so constructed that it may accommodate a stick of dynamite or a charge of blasting powder, or in fact any other explosive in stick or in bulk.

For a full understanding of the invention reference is to be had to the following description and accompanying drawing, in

which:

Figure 1 is a perspective view of the device embodying the present invention. Fig. 2 .is a vertical longitudinal sectional view therethrough illustrating the device as containing a charge of blasting powder. Fig. 3 is a new similar to Fig. 2 but illustrating the arrangement of the device when employed in protecting a stick of dynamite.

" Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawing by the same reference characters.

In the drawing the device is illustrated as consisting essentially of a pocket 1 which is preferably of relatively thin rubber. or-of any other suitable waterproof material and which is further preferably of a size and shape to receive an ordinary stick of dynamite or a suitable charge of blasting powder. This pocket 1 is comp etely closed and integral throughoutexcept at one end where it is contracted asat 2 and open as at 3. At its said end the pocket -l is gi'adually increased 1n,th1ckness asindicated at 4, so that the mouth of the pocket will be reinforced.

In order .to properly support the fuse withinthe mouth of the pocket, a disk 5 is .removably fitted therein and this disk is preferably of relatively hard rubber and is formed axially with an opening 6 through which the fuse 7 may-be inserted. It will be understood, of course, that when the charge 1s to be introduced into the pocket, the disk 5 is removed and the pocket is then either filled With the blasting charge or a stick of dynamite or other explosive is introduced th'ereinto. The fuse 7 is then inserted through the opening 6 in the disk and the disk is fitted within the contracted reinforced mouth of the pocket so as to assume about the'position shown in Fig. 2 of the drawing. The charge is then ready to be exploded in the usual manner.

When the device is to be employed in protecting a stick of dynamite, or the like, as shown in Fig. 3 of the drawing, the blast cap which is indicated by the numeral 8 is inserted throughjthe opening in the disk 5 and the fuse which leads to the blast cap and is indicated by the numeral 9 is disposed at one endagainst the cap and a rubber-tube 10 is fitted over the adjacent ends of the cap and fuse.

By referring to Fig. 3 it will be observed that the blast cap 8 is formed near its open end with a stamped out rib 11 over which the rubber-tube 10 is fitted, the rib serving effectually to prevent the tube being accidentally pulley off from the cap. In order to hold the fuse against being pulled away from the end of the blastcap, strings or other flexible connections 12 are secured to the neck of the pocket 1 at opposite sides thereof, as indicated at 13 and are tied about the fuse as indicated at 1.4.

From the foregoing description of the invention it will be seen that there is provided terial, a disk fitted within the mouth of the pocket and closing the said mouth and formed with an opening, a blast-cap fitted in circumscribing rib, 'a fuse disposed end-wise the opening in the'disk and formed with a circumscribing rib, a fuse disposed end-wise upon the blast-cap and over the rib thereon against the blast-capy-and an elastic sleeve and over the adjacent end of the fuse, and a fitted upon the blast-cap and over the rib flexible ty' g element secured to the pocket thereon and over the adjacent end of the I at the mouth thereofand to the said fuse.

fuse. In testimony whereof I aflix my signature 20 2.1 In it devilole (if the glass describd,..a I in presence of two Witnesses.

J00 ret, i316 00 et ein 0 waterr00 maierial, a disl fitted witiiin the molii-h of the JAMES D pocket and closing the said mouth and I Witnesses:

formed with an opening, a blast-cap fitted in i M. A. CoRDRAY,

the opening in the disk and formed with a ALVIN U. GALLAHAR.

against the blast-cap, an elastic sleeve fitted 1'5