IL23158A - Method for direct percussive ignition of stable explosives,and apparatus therefor - Google Patents

Description

PATENT ATTORNEYS PATENTS AND DESIGNS ORDINANCE SPECIFICATION for direct percussive ignition of and apparatns SHOE a corporation of the State of of 140 Federal of do hereby declare the nature this invention and in what manner the same is to to be particularly described and ascertained in and by the following is elevational of of an and figure 6 is view of the in In aooordanoe with the present a charge of relatively low as ordinary is completely deflagrated by direct action on the eliminating any for primers of any whether Shis is accomplished by rapidly compressing part or of the charge while it in a substantially confining term as used herein includes a striking of the charge by one or more while the charge is held on or resting against another surface or or the carrying of a charge by one surface as it moves toward another surface and causes the charge to the othor surface the resultant initiation of combustion of one or several elemental particles of the explosivo By a is meant a chamber which is so relative to the size of the that upon the combustion of the above mentioned one or several elemental charge there will result a confinement of the evolved gases so that there is obtained the deflagration or combustion of the remainder of the this progressing in a generally cumulative or by is meant the act of placing or introducing a charge into a chamber which is or becomes a confining By closed is meant a chamber which is sufficiently sealed or cannot gases evolving from the deflagration used to impart kinetic energy a movable which be a element in an explosive a as i explosiv tool or other the energy of these gases may be otherwise used to perform work as by other of energy to element or Referring first to Figures 1 and an end housing block 10 has a tubular barrel thereto by a threaded connection housing block 10 has a cylindrical recess which may be of the same diameter as the internal diameter of the tubular barrel She recess and barrel 11 are so that when the tubular barrel secured to the housing block the recess 13 and barrel combine to form in effeot a barrel with the breech end in the block A collar 1 is secured on the outer end of the barrel and a projectile or movable element may be placed in the barrel 11 firing is slidably mounted on the barrel 11 end of the toward the housing block 10 is with an annular flange the outer cylindrical wall the sleeve is preferably provided with a knurled 4 coil spring 16 is carried on the barrel 11 and is held under compression at all times between the collar 14 and the sleeve A sear lover 17 pivotally mounted on a pin in a notch 19 in the outer wall of the housing outer end of the sear flange of the spring 20 engages the opposite end of the sear lever the bottom end of this spring 20 held in a socket 21 leading radially the notch end of sear leve is formed with a radially outwardly extending finger grip portion or trigger apparent from Figure when the sleeve 15 is in the cocked position then downward or inward pressure on the trigger 22 against the of spring 20 will release the firing sleeve 15 and allow it to be driven the right viewed in this under the force of spring upon manual movement of the sleeve back to the the sear lever will again the sleeve and hold sleeve in The lower portion of the housing block 10 is formed with a cylindrical chamber preferably smaller in than the recess 13 but preferably with its axis to that of recess and the One end of chamber is connected to a cylindrical passageway 24 of diameter whioh leads to the end of the housing block other end of the chamber is closed by a plug A short channel 26 chamber 23 with the recess 1 as illustrated in Figure Another open channel 27 connects the chamber 23 with outside outer housing A striker or firing pin 28 is slidably mounted in chamber the pin having a diameter substantially equal to that of the chamber 23 that the cylindrical chamber a firing 28 has an aligned reduced diameter extension 29 which extends out through the passageway 24 and has a sliding fit with the wall of the The junction between the main body of the firing pin 28 and its reduced extension 29 forma an annular shoulder Similarly the junction between the chamber 23 and the passageway 24 forms an annular shoulder 30 in the surrounding 4s shown in Figure the axial of the firing pin 28 is considerably less than the axial length of the chamber and a spring 31 is mounted in the annular space between the shoulders and spring is held under compression at all but is not a strong its purpose being merely to maintain the firing pin urged far as possible to the right viewed in Figure outer end of the firing pin extension 29 is provided with a suitable handle 32 so as to enable the pin to be pulled to the left against the spring for the purpose of loading the chamber 23 preparatory to firing the as presently A pellet also Figure of ordinary gunpowder stable is used in carrying out the method of the present and not placed within any casing nor is it associated with any pellet 38 made up either of gunpowder pressed together so that it or it may be made of gunpowder with a binder material which will completely gassify without residue or deposit during or after the explosive pellet 3 and piston explosive need not he in pellet form hut may he powder loading of the device is accomplished as follows The firing sleeve is pulled the into the cooked position of lest the piston 28 Is moved to the lo manual pull on the handle 32 until the channel allowing access to the chamber tilth the firing pin manually held in this position a pellet 33 is inserted into the through the open channel The firing pin 28 is then allowed to move to the right until the Movement of the firing pin is stopped by the engagement of the pellet 33 with the plug 25 or end of the firing Under this condition there trill be a small amount of air together with tho pellet 33 in the temporarily sealed space between the 25 or end of the firing chamber and the opposed end of the firing pin 26 also being closed off by the firing device is ready for the pressing of the trigger 22 releases the firing sleeve the under force of the spring strikes the outer end of the firing pin extension kinetic energy from the results in the firing pin impacting and rapidly compressing the gunpowder pellet or charge while simultaneously compressing the entrapped some air space is s in Figure 1 between the charge pellet 33 and the boundary defining the substantially firing it is not necessary that such air space externally of the charge pellet 33 Shis is the char e ellet 33 is itself somewhat granular in and thereby has air between the individual particles the pellet She combination of the compression of gunpowder granules with the compression of entrapped air in the substantially closed chamber results in the explosive deflagration of the entire pellet It is believed that air is compressed and at least one or a relatively of the powder grains are viscously flow and the friction the power grains rubbing against other powder grains and against surface of the confining trails generates so that one or several grains thus evolving hot and rapidly expanding Due to fact that the chamber is substantially closed and is relatively thereby confining these hot they do not but instead serve to ignite other powder his process continues at an accelerating rate so that there results the explosive deflagration of the entire pellet hot gases from the deflagration then out through the channel 26 into the breech end of the barrel as the firing being thrust the unoovers the channel further thrust on the firing and therewith on the firing sleeve as the hot gases blow out through the is absorbed mainly by the firing sleeve spring It that gunpowder bums more rapidly and efficiently at an elevated On other it has been while a individual particles produce complete combustion of the gunpowder as does not efficiently in open In accordance with the present the explosive deflagration of the gunpowder is brought about by having the gunpowder rapidly compressed in a surrounding environment enabling rapid of sufficiently high or being of sufficiently high to cause burning of the entire 3 illustrates another embodiment of the method of the present invention wherein only a portion of the powder charge is subjected to rapid as is shorn in Figure the plug which forms the of the combustion chamber is formed with an axial cavity 34 of small She piston has a protrusion 35 in axial alignment and of substantially the same diameter as the cavity 34 so that the protrusion 35 fits the cavity 34 with a olose the firing pin receives the impact from the released firing sleeve 15 the kinetic energy of the firing pin is utilized to act through the protrusion 35 upon only a small portion of the pellet that portion into the cavity which is an portion of the charge pellet 33 has been forced into ignition oavity 34 is rapidly compressed as be the said portion of charge pellet 33 is subjected to the rapid compression in a confining chamber which is substantially 4s described in connection 1 or several of the powder granules will ignite and the ignition process will proceed within the ignition cavity evolved gases will act on the protrusion 35 and force it and the to the so that protrusion 35 is forced out of the ignition cavity At this the gases in ignition chamber 34 rapidly expand into chamber 3 and cause the ignition of the remaining portion of the pellet since it at this in a substantially deflagration of regaining portion of the charge pellet 33 the proceeds as in Figure 1 with the gases entering the barrel 13 through the channel tho embodiment of the invention in Figure a relatively lesser amount of energy is required for the operation of the firing in comparison with the operation of the method as illustrated in Figure Shis result is obtained since the percussive impaot or compression delivered on a relatively small amount of the explosive charge by the relatively small protrusion of the firing While the cavity has been disclosed in the with tho firing pin carrying the it will be apparent that the firing pin could be provided with ignition with the plug having the A practical embodimen of the invention having an ignition chamber about 5 mm in diameter and 3 deep is effective to drive a pin into a steel using approximately four grains of ordinary Referring now to Figure there is shown of spring to permit lower end 71 to pass across the part after has trigger 73 will be rotated into the position in Figure 5 where it to hold the in tho position shorn in dotted She dispenser SO is then rotated so as to bring a chamber 81 opposite pin the spring 84 forcing the ejector pin 83 to the left as seen in Figure 6 to thereby eject a pellet 33 from the chamber 81 into chamber so that it will come to rest on the anvil She trigger 73 is actuated in the usual manner to release the striker this enables the spring 72 to the striker 65 to so that the head 66 passes through the passage 63 and chamber 62 and then first rapidly compresses the pellet charge 33 against the anvil 59 in and thereafter moves the pellet 33 and anvil 59 into the confining chamber he pellet charge will thereby be ignited in the and the gases evolved from tho ignition will pass through passage 61 and cause the piston 53 to move to the left against the urging of the spring until it engages with the abutments thereby causing a element to be driven from the passage 51 Figures 5 and rapid compression of the powder charge after it is confined in the confining insufficientOCRQuality

Claims (1)

1. CLAIMS A operating explosively actuated fact that a primerlees relatively stable low explosive is confined in a substantially closed that at least part of said charge rapidly compressed thereby explosively to deflagrate at least a portion thereof consequent evolution of and that said gases are directed energy to a movable the rapid compression preceding the A method of operating an explosively actuated device according to Claim by the fact that the charge comprises a consumable A method of operating an explosively actuated device according to Claim characterized by the fact tha at part Of the charge is rapidly compressed between at least two operating A method of operating an explosivel actuated device according to Claim characterized by the fact that a portion of charge of citable introduced a conining ignition chamber while et the remainder of charge in a substantially closed confining that said ignition chamber substantially that the portion of the charge in the chamber is rapidly compressed to deflagrate at least part of said portion of said and that gases evolved from the deflagration of said portio of said charge are passed to the chamber to thereby deflagrate at least part of the remainder of said and the pressure in said firing Method of operating an actuated device according to characterised by the fact that the gunpowder prepared in pellet and is arranged in as ignition between an wall of said chambe and a firing and that kinetic energy is to the firing pin to produce percussive impact on at least a portion of the air about eaid pellet in said chamber being raised to an pressure by eaid firing pin simultaneously the delivery of the percussive impact upon said pellet and thereby aiding in producing the explosive deflagration of eaid explosively actuated tool a chamber for confining a eharge which is explosively to be characterized by f ct that the confining chamber is substantiall closed and is provided with a channel conducts gases evolved by explosion of the charge to element to be propelled and that a firing member in the form of a actuation o compress the charge to effect its explosive tool according to Claim characterized by the fact that the confining chamber is connected to a smaller chamber which forms an A tool according to Claim characterized by the fact that the striker upon actuation moves to com ress a char e insufficientOCRQuality