US542154A - Cartridge-case for charging blast-holes - Google Patents

Description

(No-Model.) r

R. H.'ELLIOTT 8v J'. B. OARRINGTON.

CARTRIDGE CASE FOR GHARG I NGBLAST HOLES No.-54 2, 154i.- Patented July 2,1895.

UNITED STATES PATENT O FICE Bonner n. ELLIOTT, on BlRMlNGl-lAM, AND JOHN B. CARRINGTON, or JASPER ALABAMA, ASSIGNORS TO Tun ALABAMA BLASTING ND MINING -M- PANY, OF ALABAMA.

CARTRIDGE-CASE FOR CHARGING BLAST-HOLES. j

SPECIFICATION forming part of Letters Patent N0. 54.2 154, dated July 2, 1 895. Application filed March 11, 1895. a Serial No. 541,33 on} model) To all whom it may concern.-

Be it known that we, ROBERT II. ELLIOTT, residing at Birmingham, in the county of Jefferson, and JOHN B. CARRINGTON, residing at 5 Jasper, in 'the county of \Valker, State of Alabama, citizens of the United States, have invented. certain new and useful Improvements in' Cartridge-Cases for Leading Blasting lloles with Explosives; and we do hereby to declare the following to be afull, clear, and

exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same.

()ur invention relates to improvements in :5 means for placing the explosive material in' the proper position in the bore-hole, and it consists in providing a friable cartridge adapted to contain the explosive material, which cartridge is pushed down to the desired position in the bore-hole and is there crushed,

and the contents of the said-cartridge are distributed accurately in place. Paper, flannel, or cloth cartridge-cases are ordinarily used for'this purpose; but these bend under the blows of the r'am tner and do not break up readily, thus preventing that loose disposition of the explosive material which is desirable in blasting.

In blastingin coal,soft rock, or loose mate- 0 rial powder of such an inferior grade or so large a grain is used that where several of the flannel, cloth, or paper cartridges, as ordinarily constructed, are used, the simultaneous explosion of the several charges, which is 5 necessary to produce the greatest effect, is not obtained.

In practice we provide a cartridge-case for the explosive material, made partly of flexible material-and partly of friable material, such 40 as a compound cartridge-case made of friable clay and of paper or like material.

\Vhile we specifically refer to clay and paper, any suitable friable material may be used in place of the clay, and cloth or like mate- 4 5 rial may be used as a substitute for the paper.

Reference is had to the accompanying drawings, in which the same parts are indicated .by the same letters throughout the several views.

Figure represents an end view of one of our-improved. cartridge-cases. Figs. 2 and 3 represent perspective views of the parts composing the cartridgercase shown in Fig. 1. Fig. 4 represents an end view of a modified form of cartridge-case, and Fig. 5 represents a perspective View of the same before being completed.

Referring particularly to Figs. 1 to 3, the cartridge-case is made up of two staves A, forming part of a circumference of a cylinder, which staves are connected together by the strips B of paper, cloth, or like material, whici strips are glued to the stares A, as at b. E be ends of these strips are made to projechliqyond the ends of the staves A, as at b, 6

so thatthey may be bent'over'to form the completed and closed. end ofthe cartridgecase. 7

In the forrn'of device shown in Figs. 4 and 5 there is but one stave A, which is prefer- 7o ably approximately semicylindrical in shape, the opposite side of the cylinder being closed in" by the strip B, which is glued to the stave A, and is provided with projecting ends, as

has been already described with reference to Figs. 1 to In any of theherein-described forms of cartridge-case the explosive material isinserted into the cartridge-case and the ends thereof are closed. The completed cartridge is then shoved down to thedesired poiutin the boreholes, and the friable material is crushed, causing the contents of the cartridge to be released in the bore-hole at any point desired. These contents are then fired in the ordinary 8 5 way.

It will thus be seen that the explosive ma-. terial may be readily and conveniently carried to the desired point and then may be released in order to be employed in the most 0 eflfective way.

The advantages of the herein-described construction will readily suggest themselves to any pr -tical mind. V

Having thusid'cscribecl our invention, what 5 we. claim, and desire to secure by Letters Patent of the United States, is

1. A cartridge case for use in conveying explosive materiahwliichconsists partly of a I material, and partly of paper, substantially to friable material, and partly of a flexible maas described.'- terial, substantially as described. In testimony whereof we aflix onr signa- 2. .A eartx'ifige case for conveying explosive tures in presence of two witnesses. 5 material, which consists partly offriable clay, ROBERT -H. ELLIOTT.

and partly of a, flexible materiaL'substam JOHN B. GARRINGTON. tialiy as described. 7 \Vitnesses: f

3. A cartridge ease for conveying explosive W. G. ROBINSQN, material, which consists partly of'& friable 4 H. C. KENNARD.

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