US1571122A - Blasting cartridge - Google Patents

Description

E. HUTTON BLASTING CARTRIDGE Filed July 24 1924 5'17esf $222 %w m 'narily to the blasting ERNEST HUTTO or amour; wnsr manna.

BLASTDWG CARTRIDGE.

Application filed July 24,

To all whom it may concern: 7

Be it known that I, Enmnr HUTION, a citizen of the U 'ted States, residin at Fairmont, in the co 'nty of Marion and tate of West Virginia, have invented new and useful Improvements in Blasting Cartridges, of which the following -is a specification. The present inventionrelates to improvements in cartridges adapted for use in connection with blasting guns of the kind used in mines and other locations for blastingcoal, rock, and for similar operations, and to means for mounting such cartridges on or attaching them to blasting guns prelimioperations. One of the primary objects of the invention is to provide a novel and improved cartridge which can be manufactured inexpensively and supplied in quantities to the users, to provide a cartridge of this kind which can be easily and quickly mounted on p or attached to a blasting gun so that accidental displacement or cartridge while the same the blast hole' is avoided, and to provide a blasting cartridge which is so constructed that it is adapted to receive a percussion primer or cap immediately prior to the placing of the cartridge on the gun, although the cartridges may be stored or handled separately from the primers or caps until the cartridges are to be used, thereby insuring safety in the storage and handling of the cartridges by preventing premature explosion thereof.

Anotherobject of the invention is to provide novel and improved means for mounting the cartridges on or attaching them to blasting guns whereby the operations of placing the cartridges in the blast holes and of firing or exploding them may be carried out quickly and with facility and safety.

To these and other ends the invention consists in certain improvements and combinations andarrangements of parts, all as will be hereinafter more fully described, the features of novelty bein .pointed out particularly in the claims at e end of the detachment of the is being placed in specification.

In the accompanying drawings Figure 1 is a collective view showin one of the blastin cartridges constructed mac.- cordance with the present invention, and a separate percussion primer on cap therefor, the cartrldge and primer be1ng shown in separated or detached relation.

1924. Serial No. 727,973.

Figure 4 represents a longitudinal section throu h a blasting gun of the percussion type aving means whereby the improved cartridge may be mounted thereon or attached thereto.

Figure 5 is a detail view on an enlarged 7 scale of one end of a blasting gun having means for receiving the'improved cartridge and embodying a firing pin adapted to fire or explode a percussion primer or cap of the rim fire type. k e 1 Similar parts are designated by the same reference characters in the several views.

lasting cartridges embodying the present Invention are partlcularly applicable for use in connection with blasting guns sing a firing pin or equivalent means for firing the cartridge by ercussion. Blasting guns of different kinds may be used in conjunction with the carblasting guns, especially tridges, and different means may be provided for mounting the cartridges on or attaching them to th e guns, an example of one type of blasting gun and the preferred means of mounting the cartridges on or attaching them to such gun being shown instance. The preferred form and construction ofthe improved cartridge is illustrated m the accompanying drawing and will be hereinafter described in detail, but it is to be understood that th stricted to the precise construction shown as equivalent constructions are contemplated and such will be'included within the scope of the claims.

In the present instance, the cartridge com- 1 prises a base '1 which may be composed of thin metal, tough paper, or.other suitable material which is suitably molded, stamped or otherwise formed to rovide an end wall 2 which is preferably at so, an outer or surrounding flange 3' andan internal socket 4. The cartrid e also comprises a shell or container 5 which ma composed of paper or other materlal w 10h possesses the requisite strength or tou l ness, this shell or container being prefera ly made from a tube of relatively tough pap n,

in theprese-nt e invention is not reor substantially 5 flange, as at 3. The

15 ent instance,

-.sleeve which is provided with threads 8 9 which-extends 2 the forward end of the when the cartridge 30 sion primer or cap cartridges embodying the present 10 a closed container for the explosive.

The socket 4: is of a shape or construction depending upon the nature of the means provi ed on the blasting uns for the attachment of the cartridges fi'lGIBtO. In the presthis socket is in the form of a which are adapted to fit and screw upon a correspondingly threaded projection or boss forwardly and axially from gun 10. The socket in the cartridge is preferably so arranged that has been screwed into place on the forward end of the blasting gun, the end wall 2 of the base of the cartridge will seat or rest on a corresponding seat 11 on the forward end of the gun and surrounding the threaded projection 9 thereon.

The cartridge embodies a tacle for a primer or firing cap, a porous being preferably used. As shown, the cap, designated 12, is of the percussion type, it comprising a body which may be cylindrical or substantially so and a head which forms a rim 13. The cartridge is preferably adapted to receive such a primer or cap by forming the inner wall 14 of the socket 4 with an annular recess 15 into which the rim 13 on the primer or cap is adapted to seat, the rimer or cap, when inserted into the cartridge, projecting beyond the socket and into the GXPlOSlVG charge 6, and in order to prevent part of the explosive charge from filling the space to be occupied by the body of the primer or cap, a sleeve 16 of paper or other similar.

material, closed at its Inner end, may be provided, if desired, this sleeve, in the present instance, having its lower or open end fitted over a flange 17 which projects axially into the cartridge from the inner wall 14:

I of the socket.

In this way, the sleeve 16 forms a chamber 18 to receivethe body of the primer or cap.

It will be understood that when the cartridges are manufactured and sold or supplied to the users, the firing primers or caps will be omitted from the cartridges and may be supplied and stored separately from the cartridges, and-that the primers or caps are applied to the cartridges immediately prior to their use. In this way, danger of premature firing of thecartridges is avoided.

As stated, blasting guns of different kinds may be used for placing and firin blasting invention.

end of the tube seat and recep- One type of percussion blasting gun is shown as an example in Figure 4, it comprising a body 19 of suitable size and length to fit into thedrill holes, and a reciprocatory rod 20 which is guided to move axially or longitudinally of the gun, its forward end working through an' axial bore 21 which extends through the cartridge attaching projection or boss 9 and serving as a firing pin for exploding the percussion primer or cap. The

rod 20 is actuated to fire the primer or cap contained in a cartridge applied to the gun by a spring 22, one end of which bears against a fixed abutment 23 within the gun and the other end of which bears against a collar or shoulder 24 which is fixed on'the rod, 20, th rear end of the rod being provided with an eye 25 or other suitable means by which it may be drawn rearwardly or retracted and then suddenly released in order that the spring 22 may propel it forwardly and thus cause its forward end to strike the percussion primer or cap. A second spring 26 which acts in opposition to the spring 22 but which is preferably of less strength. may be used to normally hold the forward end of the rod 20 out of contact with the percussion primer or cap and thus avoid danger of premature firing of the primer, this spring, as shown, hearing at one end against the forward side of the collar or shoulder 24 and abutting at its opposite end againsta shoulder 27 which is suitably fixed within the gun.

The gun shown in Figure t is adapted to fire percussion primers or caps of the center fire type, that is, those having the primer 12 located centrally of the rim 13, the rod 20 of the gun being alined axially with the primer 12 of the cap, however, it may be desirable to use percus-. sioncaps for the cartridges which are of the rim fire type, that is, to be exploded by percussion upon the rim 13 of the cap. In such cases, the blasting gun may be constructed so that its firing pin will register with or strike the rim of the cap contained in the cartridge when the cartridg is applied to the gun. For example, as shown in Figure end of the gun may be provided with a firing pin 2O which is offset with respect to the longitudinal axis of the gun so that it will strike the rim of a percussion cap contained in a cartridge when such cartridge is applied to the gun. In such cases, the reciprocatory rod' 20 of the gun may be short- In some instances, 1

5, the forward 1 those constructed ened. accordingly and arranged to strike a.

1 having a socket forme Blasting cartridges embodying the prestary body having a chamber to contain an ent invention enable such cartridges to be explosive char e and provided at one end 6 manufactured, stored and handled without with a socket or attachment removably to danger of exploding them, as it is not neca blasting gun and with a chamber to re essary "to apply the primer, cap or other ceive a primer. firing means thereto until immediately be- 4. Ablasting cartridge comprising a body fore each cartridge is applied to the blastto contain an explosive charge and having ing gun preparatory to its insertion into formed as a unit therewith a socket extendthe blast hole. By constructing the caring into one end thereof for attachment retridges with means, such as that shown, movably to a'blasting gun the inner-end for mounting them on or attaching. them to of said socket being provided with, a seat blasting guns which are correspondingly to receive a primer. v 5 constructed to receive them, the cartridges 5. A blasting cartridge for use with a may be easily' and quickly mounted on'the blasting gun having a cartridge attaching gun and placed properly in the blast holes projection at its forward end, comprising without liability of detachment, and by cona unitary body to contain an explosive structing the socket in the base of the carcharge and having a socket formed in an tridge of paper or other easily destructible end thereof to fit remo-vably on the attachmaterial, the socket and base of the caring projection on the gun, and a primer in tridge will be shattered by the force of the Said socket. explosion of the cartridge so that it will be 6. A blasting cartridge comprising a body unnecessary to manually deta h the fragto contain an explosive charge, and a base ments of an exploded cartridge f m th connected thereto and formed with an atprojection or bos of the gun i order t taching socket for removable attachment to place another cartridge thereon. In some a g g n a primer-re eiving Seat cases, as where the explosive charge is of at the inner end of'the Socket 1 a suitable nature, the shell which provides bla ting cartridge fon use with a the receptacle for the body of the ercusa tlng gun having an attaching projection sion cap may be omitted and instead thereen ng i y from and. a firing of, the necessary space fo th b d of th dev ce extending axially through such procap may be molded in the explosive char 1 9 mpri mg a dy to contain an exand su h s a may b reserved b t plosive charge and having at one end an inrelatively solid nature of the explosive used. i y extending socket to fi n h at- It will be understood that any meansequivtachmg P je 0f the g and a S at 'alent to that shown may be employed for Centered, axially at the n r nd 'Of the mounting th t id 0111 or tt hi socket to receive a percussion primer and the t th blastino guns, th means h to operat1 vely position it' relatively'to the inshown and descri ed being the preferred fillng devlce, hi

meansfor readily and securely mounting The of blasting 81115 th t id n th guns, having a pro ect1on extending axially from I l i as my i ti 1ts forward end, and having a firing pin 1. A blasting t id e b d i b reciprocable axially through said projection,

f th i f tt hand a blasting cartridge containing an exment to a blasti g d a x le iveplosive charge and having a socket at one charge-containing portion connected to the end to receive said projection on the 'gun base, the base and socket being attachable and a grime! containing chamber at the inas a unit to a blasting n. her on 2. A blasting cartri ge comprising as a cussion primer in operative relation with unit a body adapted to contain an explosive the firing pin of 'the gun. charge and havin a socket in one end there- In testimony whereof I have hereunto I of to fit removafiy onto an attaching proset my'hand. jection on a blasting 3. .A. blasting cartrilfig d comprising a uni- 1 ERNEST HUTTON.

of the socket for positioning a per-

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