US2650540A - Blasting cartridge - Google Patents

Description

Sept. 1, 1953 K. c. BUGG BLASTING CARTRIDGE 2 Sheets-Sheet 1 Filed Feb. 7, 1950 INVENTOR.

BY MM Sept. 1, 1953 K. c. BUGG BLASTING CARTRIDGE 2 SheetsSheet 2 Filed Feb. 7, 1950 gVENTOR. By [613% 599 W, [ww r W 0.846 0 0 0 @vvg 5%.

zy; v k v Patented Sept. I, 1953 usirsm stmrsss:

8'.IClaims.\-. (Cl. 1024 -25.) 2

1s This' -invention' pertains to a blasting cartridge and; more particularly; to acartridge -for-=a blasting 'shell which is so constructed that it has a timing efiect Ari object of theeinvention is tmprovide 'a-"pres 5 the discharge ports communicate with==a passage;

which is'chokeduor tapered), or-with a -passage wh-ioh communicates with a --passage =-W-hichhas been-chokedmrior to the communication between-- the-diseharge-portsand the 'passage -thereto-.-

Another -obj ect rof=-the=invention= is to -provideapressure b'uilding cartridge wherein the wad ding, when it is moved to the choked position, is reduced-in mass and/ordefiagrated'to release the-pressure built up-behind thewadclingeto-the 5 discharge ports;-

Another obj ect of the-invention -is -to- =provide pressure holding =m'eans as for a blasting cart/ ridge that performsa timing functionyupom re-- duction of'its' mass -by'oxidation; so=thatthe1 discharge of 1 the blasting shell -may" be -controlle'd for= the full 'pressure buil'd upof said: cartridge in the blasting-shell;

Another obj ect- -of "the invention is to provide a cartridge for a-blasting-shellor the like;-anda""- pressure timing; means separate-thereto whereirr 3,

greatervolumeof charges canbe-obtained: with) out necessitating complicated cartridge assemblyr Another object *of-"the invention is -to-previde" a'pressure building cartridge'for a-blasting she1l or'the like; provided-with means of timing-thedeveloped" pressures thereof; and wherein the v cartridge carrbe readily-manufacturedim a man ner similar to present -pressurecartridge manu facture;

Another object of the invention is te -provide-=- 4 5 a pressure "building cartridge for a blasting sh'el'l or the like; wherein after firing;- the resultant pressure and timing may beexactly-controlled in regard to the -pressure-releaseironr the blast ing-shell wherein thecartridgeis' :used;

Another object of thednvention is to provide" a pressure building cartridge for ablastingshel-I and the like, and-time contro1-- therefor, whiclr is: constructed--- andarranged :for-rthe: greatestnpose sible safety of=handling=and loading-witlr respectf=55 2; fi2'5fl04; may besuti lize'di .butz-fonthe purposem thissrappiicationgi thesshell':dericezzcomprises:thee

te -the blasting shell wherein it is-useda Another"obj'eet of theinvention is to providea*pressure-bui1di'ng cartridge wherein parts can" be'made "sothat"the*generatedpressures can b'eselectively varied'biwassociation of parts-of var-i ous capacities. 1

With :these -and variousoth'er 'objects *in view r the-invention-consists *of -*certain novel-featuresof construction and operatiom as will be" more fully deseribed-*--and particularly pointedout-"m the specification, drawings and claims appendedheretoz' mane dr awings; which ill'ustrate embodiments of-thedevice=--and wherein like referencechar actersaremsed to-designate like parts-- Fi'gure -1 isa iragmentary; sectional -elevation=- througha form of blasti-ng-shel1- device embody ing the invention showing a -blastingcartridge embodying: the invention position wherein the cartri-dge has beenfired'but-the-powder or -oxidizable pressure generating means is" still burning;

Figure z' is' a fragmentarw sectional elevation cor-responding -to Figure-- 1, but showing th'e evad dingas :in position:- as illustrated in Figure latter the powder has b'een burned but priormane-- movement ot th'e waddingby: the pressure gen' eratedt Figure 3 is a fragmentary;'sectional elevatiom corresponding to Figure 'fl'sl-rowing the :wadding in: positionwafterrwi pressure increase/and? j usta prior te tl'ie wadding 'uncovermgsethe pressure=re-ilease pontsg Figure 4is= ani-l-enlarged; sectionah elevation: through a ifdlnli of 'blastingvcartridge -iembodyinge the -invention";

Figures 5 to 8, inclusive, are fragmentary, see tional elevationssthrough portionssoff modified forms oin blasting shells 1embodylnggtheiinvene: tiOn'e,

FigureQisra sectional planwiewstaken substarr-s tiallydmathe plane.:assindicatectby=.the :line 9+':-9, of Figure 8i';

Figure :fisxamexplodedwiewsofeanothenzmod:

I ifiedi fOIIIlIiJOfZ blastingizcartridge; embodying the:

invention; :and

Figureellzisianzendxelevation ofiithe sealed'end: of itheupolztidrr,ofiithe blastinggcartridge attthe: rightbt FigurealOpthe sameilooking in;.thier.direc.-;-.- tiom of :thesarrowss I l;-I-l in-Fi'gureaMx,

Referring first or ialigrimore ;particu1ar1y;t0ethei biastingrrshelli deviceeillustrated imFigureswl 11:02.3,

inclusivee. it risizoi rcourse understood ;that aash'ell; delvice suchz iasidllustrated imapplications ;Serial; Nos; 136;? 69;1'fi1ed -J anuam -vi;- 1950;; and fierialcgNoi 142;51-2;:ifiled::February '4; .1950; now =Patent-:No.:.

substantially cylindrical body member 2|] threaded as at 22 for the reception of mating threads of the firing mechanism casing 24, said firing mechanism being particularly shown and described in application Serial No. 136,769, filed January 4, 1950. The firing mechanism is operated as described in said last named application, suitable operating means releasing pivoted latch members 26 after a predetermined movement thereof toward the right as viewed in Figure 1. Movement of the latch members 26 toward the right serves to move the hammer 28 away from firing pin 38, such movement of hammer 28 compressing spring 32 whereupon, upon release of latches 26, spring 32 moves hammer 28 to strike.

pin 30 causing it to move toward the left in closure 34 of casing 24. Pin is adapted to con-' tact detonating means shown generally at 36 in.

the firing cartridge 38, such cartridge being received in the cylindrical cartridge recess 40 in body member 26 of the shell device. Firing the cartridge 38 causes the oxidizable pressure generating means to be burned, projecting the wadding 42 causing it to move in the substantially cylindrical cavity, chamber or passage 44, which may be termed a choke or constricting passage, being of slightly smaller diameter than recess 40, being connected thereto as by the frustoconical shoulder 46.

Passage 44 communicates with the substantially cylindrical outlet passage 48, which is of smaller diameter than choke passage 44, being connected to said choke passage as through shoulders 58. Passage 48 is adapted to be closed at its forward end by means of the end closure member 52 threaded to the body member as at 54, the end closure member being provided with the recess 56.

For the purpose of convenience the end of housing 28 provided with threads 22 for connection to the firing mechanism casing 24 is herein termed the rear end of the device, while the end of the device-provided with the threaded connection 54 is termed the forwardend. All threads are preferably of the quick disconnect type, and recess 40, passages 44 and 48, and the cavity 56 are co-axial.

Passage 48 is provided with the rearwardly directed pressure releasing passages or ports 58,

which are generally radially disposed from passage 4B, and are controlled to release pressure generated by the firing of cartridge 38 (and the cartridges described with respect to Figs. 4 to 11, inclusive), by the passage of the wadding past ports 58. i

Referring generally to the cartridge 38 illustrated in Figures 1 to 3, inclusive, said cartridge 38 comprises the shell casing 68 which is of noncorrosive material, such as. brass, plastic, etc., said casing having an end closure positioning flange 62 for engagement with the shoulder 64 disposed at the rear end of body member 20 (or rear end of recess 48) whereby the flange may be clamped between the forward v.encl of firing.

mechanism casing 24 and said shoulder 64. Detonating means, generally indicated at 36, extends within the cartridge, and the cylindrical charge retaining sleeve 66 is providedin shell casing 60 projecting therefrom.

Sleeve 66 from the end closure of casing 60 isfilled with .a pressure charge such as a selfoxidizingv nitrate, and the end of sleeve 66, is flanged for retaining wadding 42, the wadding being protectedby means of a wadding nose 68, preferably of waterproof material. The wadding is provided with a slow burning oxidizing means.

4 10 which is preferably adhered to the wadding and separated from the first named self-oxidizing means as by a fast burning powder or igniter, more particularly described with respect to Figure 4.

Thus, generally, in operation of the device illustrated in Figures 1 to 3, inclusive, operation of the firin mechanism of casing 24 in the manner described in said application Serial No.

136,769 causes operation of the detonating cap 36, which operates to ignite the pressure charge adjacent said detonating cap and within sleeve 66. Oxidation of said pressure charge causes operation of the fast burning igniter and oxidation of charge 10. As the pressure charges burn, pressure is built up, causing wadding 42, nose 68 and charge Ill to be moved toward the left as viewed in Figure 1 within choke passage 44,

slightly constricting wadding 42, nose 68 and charge 18. Wadding 42, nose 68. and charge!!! will be arrested momentarily, by shoulder 50 as illustrated in Figures 1 and 2, and charge 10 will burn or oxidize. This oxidation increases the pressure and expansion takes place between the wadding 42 (Figure 2) and shell casing 60. After a predetermined time interval, the pressure will have built up sufficiently to cause the wadding 42 and nose 68 to be extruded and moved along passage 48 until it passes ports 58, permitting the pressure to be released rearwardly through said ports to react against the adjacent material (such as coal, etc.) to move said material in the desired manner, all as particularly described in said application Serial No. 136,769.

Figures 4 to 11, inclusive, illustrate different modified forms of cartridges for accomplishing the above referred to objects, the different forms of cartridges being selected for various reasons, such as a different timing effect, a different cost, different handling problems, different storage problems, etc.

In the, cartridge illustrated in Figure 4, said cartridge comprises the shell casing 12 of noncorrosive material, such as brass, plastic, etc., having the flanged end closure 14. A charge retaining sleeve 16 is secured within the casing 12 and projects from the end closure outwardly of the open end of the casing, said sleeve being preferably of water-proof material such as cardboard or the like, the inner end of said sleeve shown abutting the end closure 14. End closure 14 is provided with the detonating cap 18 extending inwardly thereof, and being adapted to be operated as by the firing pin 38 in Figure 1. Cardboard positioning liners and 82 (of circular cylindrical and circular disk shape, respectively) are disposed within the shell casing 12, and sleeve 16, and between said liners and an igniter 84 there is disposed a pressure charge 86, such as a selfoxidizing nitrate, the igniter comprising a fast burning powder-which is preferably adhered to a therefore, operation of the, detonating cap 18.

oxidizes charge ,86, in turn causes ignition of igniter 84,-the pressure built up projecting the wadding 90,.,.n.0se a2, and.cha ee .8 gutward v.

assumes.

ofssleevee'IB; suchzas shownuatifiI!Ti-42+!IlroiaFigure rl. Igniter184 and charged;srarezthenrburnedj untihpressure-tis.:built'uplsufficiently .to moveinose 92cand :.wadding. 9D: fromrtherposition: as; shown at-68..421in"Figure..2, to; uncover, thezpressure. 5 releasing: ports;- 58:; asrxdescribedsiwith ;respect: to 68;.42;in- Figureqfi.

In; :therdevices. illustrated. in" Figures; 5 and .16; chargesretaining lsleeves i96 are similar 1 to :sleeves; 16rand;are,-close by :meansof-v aezflangedlend member; not"shown,' similar .tou'nember. I 4 (Fig iii-e14); Sleeves-:Qliare flangedasat-Bil (similar; to :84 inrFigure .41 .vforiretainingcthe endiwaddingi members slllflzandinose IUZgsimi-lanto .wadding. andanoseesfliand'flz $.(FigureA) In'Fi'guresfi and-q 6 end wadding member I00 is backed by means; ofswaddingilaminations I04.iand-:1IIl6iin-.=Fi'gure 5, andxI Miami: I 08 in Figure 6 ,f the adjacentiamina: tions.'of. ,waddingbeingiormed to: provide -explod-. ingrpockets. :l I I) which ;are:fil1ed-;with suitable :exe: plosives and the pockets arev connected by axially Y disposedipassagese II2, (which are also powder, filled; In" the construction illustratedin Figure.-. 5117118 inner wadding member .-I 061is provided: with inwardly: directed extensionr ll4aextending. into-:thepressure charge I I61 (similar toucharge BIieFigurei l) and' the.pocl et I I0 formed partially. inswadding I06 :isv connected: to.1saicl charge I I 6 through the axially disposedlpassage IIIli-which isrpowdenfilled; In. thacartridge illustrated fin Figure 6..inner. pocketzl I 0 sis. connected. through the; flexible fuse .I2ILto the pressureichargei I22 (similar to charge 66 Figure 4) fuse I; being also filled with suitable powder .or ignition means.

Thus,.when charges II6or..I22 are burned they also cause burningrof the powder in powder filledpassage I I3 or powder filled fuse IZIL causing the serial explosion of-the -powderifilled pockets III], such explosions operating to build. sufiicientpressure to project thewaddingi IIIJ-and-nose I62 in the same manner as waddingfifl and nose 92 (Figure 4) is projected. I

In the cartridge construction illustrated in Figure '7 the charge retaining sleeve I24 is adapted tobe closed as by-a' shell casing :7 (notshown) similar to that illustrated. at 12 .in- Figure 4, and 1 said sleeve is flanged as at I26 to retain the wadding I28 and nose I3il thereof,similartowaddi'ng 90and nose 92 (Figure 4) Wadding I28= is provided with pocket I32 for the reception-of a charge I34, such as that illustrated at 88 (Figure- 4), and a separator and-igniter I36;for-loadingand igniting purposes, is interposed between wad-- ding I28, charge I34 and pressure charge I38 (similar to-36, Figure-4) said igniter being preferably' provided with apertures Mil-disposed sothat charge I38 communicates with charge- I34 through said aperturesIM); Thus when the cartridge is detonated; the pressurecharge I38 will cause ignition or burning of charge 134 through igniter I36, and the wadding I28-and nose I30= will'be projected as already described with respect to the wadding and nose of Figures 1 to 3, inclusive:

Referring nowlto the. construction illustrated in Figures 8 and 9, the charge retaining sleeve- I42; similar to sleeve I6 (Figure 4), is adapted. tobeclosedby the shell casing.(not shown) similar to casing I2 (Figure 4) and said sleeve I42 is provided with the pressure charge I44, similar to charge 86 (Figure 4) retained between the liner (similar to 8ll82, Figure 4) and the wadding I46 is provided with nose I46, said wadcling and nose being retained by the flange I50 of sleeve I42. An igniter similar to igniter 84 may fl'pacity of the parts may be varied.

6 beeinterposedxbetweerr charge I 44 and-wedding I465. though. it :i I not illustrated i in Figure 8 Wadding I46i is. provided with' the honeycomb passages I 52 'forathereception-of pressure charges similarvto.that illustrated'at 88 (Figure 4). The

honeycomb passages:- I 52 may besaid to be ax ially disposed; parallelly arrangedpassages ex tending. fromz the inner surface-of wadding I 46-} being; open. to.:.communication with ch'arge I44;

but .preferably terminating in spaced-relation to:

the outerlend of wadding I46," that is, in spaced relationsito the nose I 485: Firing--of the'cartridge ca-usessapressure.charge: I44- to ignite the charges ins-passaegs' I52;Zcausing projection of the-wadding: I 46::and nose I ES -as already described with-- respect. to the-wadding rand n'ose illustratedin Figures- .1 .to: 3, inclusive;

Inzzthe. deviceillustratedin'Figures 10 and- -11} a two-part device is illustrated wherein'the -ca In this =-form ofthedevice theinitiall y operated main, or detonating part indicated generally at I54- in Figure 10;.that is,:atthe right of saidfigure, comprises thei'shell casing I56; similar to casing 12 (Figure-' 4), closed byther-fianged closure I58-*provided-- with the: detonating cap I 60; The charge-re-- taining' sleeve I 62 projects outwardly from cas ing ISB -and retains-the pressure charge I645 similarte charge 86--(Fig'ure=4),- charge IIi4 -beingenolosed by turningover-theendfingers I 66- ly-at-I 'llksh'own at the-lef-t of'Figure 10, is ofsubstanti-all'ythe-same" diameter as =sle'eve--= I 62- "and-" is adapted to bra-associated 'with' thei part illus trated at I54. Part ITO-comprises= the-=substantially' cylindricalsleeve I12" of suitable waterproof mater-ial, such ascardboardorthe like;

closed-by thedished end- I14. Wadding- I'mis disposed in-the -dish'ed -end-I'I4-' and charge I 18 similar to charge 88 (Figure4), is interposed-between wadding-IIS and igniterIBI); similar toigniter 84 (Figure 4), apertures I82beingpro vided in said-'igniter.

instead of the dished end retaining wadding I16,

said'waddingmay be-providedwitha nose 'as 92* (Figure-4) held by a-flange-similar to 94,

shown in Figure 4. Before association between--v parts'I'II) and I54,-as-whereth'e p arts -are stored, apertures I82 are closed :by means 0f the re-' movableend sea1 I86-which is adhered to the-i igniter; beingprovided with-a sthumb tab-- 88 itoi 1 facilitate ready removal thereofi Thus the. loading (size-of devices I54 and-I1Iland the' contents thereof) deter-mines theclient thereof;

In operation ofthis form-of the device, where;

forexample; it-isused-inplace=of cartridge 38,5v

of; Figure 1,' member-I'IIJ,after shell I86hassbeen removed,- is adapted to be inserted'into recess:

40, and member "I54 can "then be--applied and the firing mechanism casing 24 can be associated:

with the body member 20. Operation of the firing mechanism will cause the detonating means I60 to cause oxidation of charge I64 which is communicated to the wadding I16 through ignition means I and charge I18, causing opera- The igniter is retained .inpostion by means of the-flange- I84-of sleeve I121 Sleeve I12 may be substantially cylindrical-, and-*- tion of the cartridge in a manner similar to that already described with respect to the cartridge illustrated in Figures 1 to 3, inclusive.

In the variations of the device shown it is appreciated that cartridges are provided permitting selected times of operations to be utilized as well as selected pressures to be effective, but wherein preferably complete oxidation or the complete cycle of pressure building is accomplished prior to the release of the pressure through ports 58, as illustrated in Figure 1.

It is to be understood that this application is not to be limited by the exact embodiments of the device shown, which are merely by way of illustration and not limitation as various and other forms of the device will, of course, be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

I claim:

1. A blasting cartridge comprising a substantially cylindrical, flanged end provided with detonating means, a substantially cylindrical charge holding body member secured in said end and extending therefrom, relatively slow burning oxidizable means disposed in said body member for a portion of the length thereof from said end, laminations of wadding disposed outwardly of said oxidizable means, and a wadding nose for securing said wadding in said body member.

2. A blasting cartridge comprising a substantially cylindrical, flanged end provided with detonating means, a substantially cylindrical charge holding body member secured in said end and extending therefrom, relatively slow burning oxidizable means disposed in said body member for a portion of the length thereof from said end, laminations of wadding disposed outwardly of said oxidizable means, and a wadding nose for securing said wadding in said body member, said wadding having explosive receiving pockets between said laminations.

3. A blasting cartridge comprising a substantially cylindrical, flanged end provided with detonating means, a substantially cylindrical charge holding body member secured in said end and extending therefrom, relatively slow burning oxidizable means disposed in said body member for a portion of the length thereof from said end, laminations of wadding disposed outwardly of said oxidizable means, and a wadding nose for securing said wadding in said body member, said wadding having explosive receiving pockets between said laminations and an explosive filled passage between said oxidizable means and said pockets.

4. A blasting cartridge comprising a substantially cylindrical, flanged end provided with detonating means, a substantially cylindrical charge holding body member secured in said end and extending therefrom, relatively slow burning oxidizable means disposed in said body member for a portion of the length thereof from said end, wadding disposed outwardly of said oxidizable means, and a wadding nose for securing said wadding in said body member, said wadding having an explosive receiving pocket disposed therein and communicating with said oxidizable means.

5. A blasting cartridge comprising a substantially cylindrical, flanged end provided with detonating means, a substantially cylindrical charge holding body member secured in said end and extending therefrom, relatively slow burning oxidizable means disposed in said body member for a portion of the length thereof from said end, wadding disposed outwardly of said oxidizable means, and a wadding nose for securing said wadding in said body member, said wadding having an explosive receiving pocket disposed therein and communicating with said oxidizable means, and a separator disposed between said oxidizable means and wadding provided with apertures between said oxidizable means and pocket.

6. A blasting cartridge comprising a substantially cylindrical, flanged end provided with detonating means, a substantially cylindrical charge holding body member secured in said end and extending therefrom, relatively slow burning oxidizable means disposed in said body member for a portion of the length thereof from said end, wadding disposed outwardly of said oxidizable means, and a wadding nose for securing said wadding in said body member, said wadding having a plurality of parallelly arranged explosive receiving pockets disposed axially of said cartridge communicating with said oxidizable means at one end thereof, the other end of said pockets being spaced from said nose.

7. A blasting cartridge comprising a substantially cylindrical, flanged end provided with detonating means, a substantially cylindrical charge holding body member secured in said end and extending therefrom, relatively slow burning oxidizable means disposed in said body member for a portion of the length thereof from said end, a closure for the end of said body member spaced from said first named end, a wadding within the closure, said wadding having portions extending inwardly from the end of the closure and laterally covering a portion of the oxidizable means.

8. A blasting cartridge comprising a substantially cylindrical, flanged end provided with detonating means, a substantially cylindrical charge holding body member secured in said end and extending therefrom, relatively slow burning oxidizable means disposed in said body member for a portion of the length thereof from said end, laminations of wadding disposed outwardly of said oxidizable means, a wadding nose for securing said wadding in said body member, said wadding having explosive receiving pockets between said laminations, the inner pocket having an explosive filled flexible fuse extending into said oxidizable means and connecting said oxidizable means and the inner pocket, said laminations having explosive filled passages between said pockets.

KENLY C. BUGG.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,190,460 Taylor Feb. 13, 1940 2,207,191 Geertz July 9, 1940

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