US2983223A - Ammunition for open chamber guns - Google Patents

Ammunition for open chamber guns Download PDF

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Publication number
US2983223A
US2983223A US733162A US73316258A US2983223A US 2983223 A US2983223 A US 2983223A US 733162 A US733162 A US 733162A US 73316258 A US73316258 A US 73316258A US 2983223 A US2983223 A US 2983223A
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United States
Prior art keywords
chamber
case
drum
cartridge
open
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US733162A
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English (en)
Inventor
Dardick David
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DARDICK Corp
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DARDICK CORP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL101796D priority Critical patent/NL101796C/xx
Priority to NL200147D priority patent/NL200147A/xx
Priority to BE541050D priority patent/BE541050A/xx
Priority claimed from US454045A external-priority patent/US2865126A/en
Priority to GB24900/55A priority patent/GB789245A/en
Priority to DED21207A priority patent/DE1057500B/de
Priority to CH347107D priority patent/CH347107A/fr
Priority to FR1139598D priority patent/FR1139598A/fr
Application filed by DARDICK CORP filed Critical DARDICK CORP
Priority to US733162A priority patent/US2983223A/en
Publication of US2983223A publication Critical patent/US2983223A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/61—Magazines
    • F41A9/64—Magazines for unbelted ammunition
    • F41A9/65—Box magazines having a cartridge follower
    • F41A9/68—Plural magazines, e.g. tandem magazines ; Arrangements of cartridges in two or more independent rows or channels which are selectively or sequentially brought into operative position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A15/00—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/12—Cartridge chambers; Chamber liners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/01—Feeding of unbelted ammunition
    • F41A9/24—Feeding of unbelted ammunition using a movable magazine or clip as feeding element
    • F41A9/26—Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine
    • F41A9/27—Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine in revolver-type guns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/01—Feeding of unbelted ammunition
    • F41A9/24—Feeding of unbelted ammunition using a movable magazine or clip as feeding element
    • F41A9/26—Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine
    • F41A9/27—Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine in revolver-type guns
    • F41A9/28—Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine in revolver-type guns of smallarm type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/38—Loading arrangements, i.e. for bringing the ammunition into the firing position
    • F41A9/46—Loading arrangements, i.e. for bringing the ammunition into the firing position the cartridge chamber being formed by two complementary elements, movable one relative to the other for loading
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C3/00—Pistols, e.g. revolvers
    • F41C3/14—Revolvers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/045—Cartridges, i.e. cases with charge and missile of telescopic type

Definitions

  • This invention relates to ammunition for open-chamber guns.
  • each chamber will travel once around the rotation a1 axis of the drum in a closed circular path. path, starting from a loading position passes successively through a firing or battery position and an ejecting posi; tion, and thence to the loadingposition again, 'to com? plete the cycle.
  • Each chambenwhile in transit through the loading position is radially supplied automatically with a round of ammunition from a magazine unit which is preferably, detachably connected to, and, forms-a handle of, the gun.
  • po ion o i a ea o provide one, and preferably more than one, trough-like r ess or chamb r. pa al elto the r t onal; a s of; t
  • Th recesses ar i eut ea in shape bein of un form non-circular contour from end to end in parallel planes normal to the rotationallaxis ofthe drum and tap ed n wid h in sa no l Pl es r a: maximum a thepp por mo .1 thei ha nberrto ii/minimum at. the baset ereoh E eh re e eonst tutee? n pen artr d eh mh h e h the.
  • the rotary is constructed and an ranged to; provide an accessjopeningat; the prime end of the chamber through which. a firi g-p n or ethe 1 t: ablefiring means may :be caused to act on the primer of theeartri getofire hesame. 1, Y 2.
  • a.preferred ⁇ eenstr ti neae ehaini hen runs from. end to end ot the drum, the acc ss and escape openings, of the chamberbeing locat ed inopposrt'e end; faces of the a'ndheiug of the same size and vshapeastherflmrrflserineross section:
  • tpgthe druin axis a breech surface disposed too the magazine unit being open at one end and being de signed to receive, at the opposite end, a load of ammunition.
  • the ammunition load is arranged in the storage chamber in one or more rows of side-by-side rounds, the rounds being delivered successively through theopen end of the magazine-unit to successive cartridge chambers of the rotary open chamberdrum as it rotates,
  • the open chamber rotary drum serves as'a rotary gating and conveying device functioning in rotation to pick-ofi one round of ammunition at a time from the magazine unit and to convey the round'sequentially to the battery position for firing and thence to the ejecting position for ejection from the drum.
  • the empty cartridge case is automatically ejected from the chamber by suitable ejecting means projected into the chamber at a suitable phase of the cycle.
  • the drum is suitably disposed at the open end of the magazine unit to bring the open chambers of the drum successively into. opposition with a terminal round of ammunition in the opening, as the drum is rotated.
  • means are provided at the opposite end of the magazine unit for yieldably urging the row or rows of ammunition in the stationary magazine chamber to-, ward and into contact with the cylinder surface of the rotary drum so that the terminal round of ammunition in a given row will be caused to enter and be seated in the firstemptyopen chamber brought into opposition there: with.
  • The'stationary frame of the, gun is constructed and ar ranged to serve as a breech for both the opentop or mouth and the primerv end of each cartridge chamber,
  • the arcuatebreech surface has a radius or curvature only slightly largerthan that of the dmm so that the cylinder surfaces of the drum and breech will .be insubstantiallywiping engagement when inopposin'grelation to each other. flfhus, each open chamber onreaching its batt y pos tion wi e e y p d b the uel breech surfaceand'thus be converted intoa closed car;
  • tridge chamber of generally triangular shape oifering a s b antia ei f n l y o i ou s pnert lgiwell su fa e a a which t e ee e m y PeI N
  • PeI N For the purpose of closing the primer end of he.
  • Irigger actuated means are provided for effecting rotationjof the rotary drum so' as to bring the successive recesses into battery position 'and for firing the individual rounds when so positioned.
  • a cartridge for use with the open-chamber guns aforesaid wherein the bullet or projectile of the cartridge, together 'with the propellant therefor, is wholly contained within the case or'shell of the cartridge.
  • the. case is of a contour circumferentially,
  • the cartridge when positioned in an open chamber of the gun, the cartridge. will fit snuglyagainst and-be supported bythe side walls of the chamber. Moreover, because of its cylindrical surface portion having a radius of curvature matching that of the cylinder surface of the drum, it serves to provide, in effect,.a continuation of the cylinder surface of the drum over the entire span of the chamber at its mouth.
  • the case is of triangular shape, each of its sides being arcuate and of equal radius of curvature so that when used in an open chamber whose sides are. correspondingly curved, it may be inserted in the chamber with. any one of its three apices at the bottom of the chamber.
  • the case is of a contour circumferentially which also is other than circular so that the gas pressure created within the case on firing will tend to cause the case to assume a circular shape in cross-section and thus to be firmly supported externally throughout its entire circumferential periphery by the side walls of the open chamber and by the arcuate breech surface of the gun frame.
  • the internal circumferential contour of the case may be geometrically similar to its external circumferential contour, since the fabrication of the case is facilitated in so doing, and the wall thicknesses of the case may be closely controlled within permissible limits.
  • the thickness of the case is preferably greater at the intersections of the case walls than between the intersections. In this way, reinforcement is provided at the corners of the case so that the possibility of the case bursting longitudinally along the line ofeither joint between the rotary drum and cylindrical breech surface of the gun, iscompletely, or substantially completely" eliminated.
  • the casing case isof a length coextensive with that of the open chamber in which it is to be used.
  • One of its ends, the primer end is closed by a primer unit'which, in battery position of the open chamber, isadapted on firing of the cartridge to, press against and beopposed by the end "breech surface ofthe gun frame.
  • Means are provided within the case for supporting the bullet of the cartridge wholly withinthe case in annularly spaced relationthereto, and for forming a sealing flange at the other end, the muzzleend, of the case.
  • the sup ⁇ porting and flange-forming means as here preferablyem;
  • the sleeve telescopically receives, and securely but-re leasablyholds, the bullet in'coaxial alignment therewith,
  • the sleev'e'inay be rifled internally, if desired, forco-action-with to with a cylindrical breech surface 11 which as shown iri axis of the bore 10 of thebarrel.
  • the rifting or pre-engraving of the sleeveor bullet should conform in pattern to that of the rifling of the barrel of the gun with which the cartridge is to be used, it being apparent that the cartridge must be properly indexed in its recess to achieve alignment of the rifling of cartridge and barrel.
  • the cartridge and the open chamber of the gunin which it is to be employed may be of a contour such that the cartridge may be received, or pre-indexed, in the chamber in only one position.
  • Fig. 1 is a vicwinside elevation with parts in section of an open chamber revolver, the view showing an open drawings which form part offthe refer to chamber of the revolverdoaded with the new and im- Fig. 3 isa; fragmentary viewin section taken along the line 3 3 of Fig. 1 showingthe rotary chamber-revolved from the battery position showninFig. l to the cartridge ejecting position; b Fig. 4 is a somewhat enlarged fragmentary view in section taken along the line 4-4 of Fig. l, the view showing detailsof the cartridge construction;
  • Fig. 5 is a fragmentary isometric view of the open chamber revolver ofFig. 1 showing details of the open chamber; s a t Fig. 6 is a viewin section and to an enlarged scale of the ammunition shown in theopen-chambe'r revolver of 'Referring' now more particularly to the accompanying drawing,-a rotary drum 1 is mounted for rotation on its cylinder axis" in 'a frame 2 by means of coaxially aligned shafts 3and 4 at its respective opposite ends.
  • the drum isrecessed longitudinally to provide aplurality': of open chambers 5 which, as here preferably embodied, at l-thr'e in number and are spaced at equal distances circumferentially around the drum.
  • each chamber 5 is identical and paralleltherotatiom a l axis of-the drum'.
  • the sidewalls 6 of each chamber ' are arcuate in shape, each'l1aving a radius of curvature the same as that of the drum.
  • each chamber is adapted to receive within its confinesa cartridge in ac cordance with this invention having a configuration precisely conforming' to that of the chamber.
  • each chamber extends from one end to the other of the drum so as toprovide an escape opening 1 at oneend of thefdrum and a primenopening 8 at the oppositeendofthedrum.
  • r 1 1 As shown in Figs; 1' and 2 the drum is in battery position in which the topmost chamberofthe three chambers in the drum-is aligned with a'barrel 9 carriedfby the frame 2. In this position, the geometrically longitu dinal "axis of the chamber is coaxially aligned with the The frame 2 forms a breech for the open top of the primer opening 8 of the chamber when the latteris in battery positionL-To this end, the frame Zis provided Fig. 1 spans-the charnber from end to end 'and, as shown in Fig.2'spans the chamber-between the walls 6 and,
  • the cylindrical breech surface' 11 is concentric with the rotational axis of the drum 1 and is of a radius of curvature which is substantially the same as that of the cylinder surface of the drum.
  • the cartridge 12 with which the chamber 5 is loaded is, like the chamber, of non-circular configuration externally. matching that of the chamber.
  • the walls 13 of the cartridge are, as shown, arcuate in shape and of a radius oficurv'ature the same as that of the drum 1.
  • the uppermost Wall of the cartridge for-ms a continuation of the cylindrical surface of the drum so that the drum is. capable of rotating freely with respect to the cylindrical breech surface 13 of the frame 2.
  • the cartridge since each of the walls 13 ofthe cartridge are of the same curvature, the cartridge may be inserted in the chamber 5 with any one of its sides uppermost so that indexing of the cartridge with' respect to the chamber during the loading operation, is unnecessary.
  • Closure of the primer end of the chamber 5 in the battery position is effected by a flat breech surface 14 which is'normal to the rotational axis of the drum 1 and is in closely spaced parallel relation to the breech end, surface 15 of the drum.
  • the breech-surface provides a strong and rigid supporting surface against which the primer end of thecartridge 12 is adapted to hear when the cartridge is fired.
  • T e frame2 also serves to support a firing pin 16 and a hammer 17 which latter is actuated by suitable trigger mechanism including trigger 18 and hammer-actuating sha t19-
  • suitable trigger mechanism including trigger 18 and hammer-actuating sha t19-
  • the shaft 19 is reciprocably mounted in the frame 2, being. connected at its one end to the hammer 17 by means of a pin 20 which rides in a slot 21 in the hammer.
  • the opposite end of the shaft 19 is bifurcated to receive within the yoke thereby formed, one'endof the'trigger 18 which latter is provided with an arcuate slot 22 which I receives a Pin 23 so that rearward movement of the trigger on its trigger pin 24, will effect a forward movemerit of vthe hammer-actuating shaft'19 and, in turn, movement of the hammer to a cocked position as shown in Fig. 1.
  • the shaft 19 carries a hammer spring '25 concentric t herewith tending to, drive the-head 26 of the hammer against the firing pin 16.
  • Means are provided for effecting rotation of the drum 1 so. assuccessively to bring the chambers 5 each to the batt ry. pos i du in o kin lcf he amm n tolock the drum in'bat't'er'y tionas' thehammerfalls. A h re.
  • pr rably em d th r'u'm af or aX1e4 hich is iouma l d i he am i2 i p o d d t s o ward endwith a cylinder earn 27 having a' number of cammingfsurfaces 28 disposed longitudinally and circumferentially thereof, there being one such camrning surface for each. of the chambers of the drum
  • a cam actuating lever 29 is pivotally slidably mounted on a pind30 carried by the frame 2 so as to engage the cam- 1 thing surfaces 28 one at a time and to rotate the cylinder cam 27' and thus the .drum 1 through a"120.
  • the lever 29 terminates at its one end in a cam actuating surface 31 engaging the cam surface 28' as shown in" Fig. l, and terminates at its opposite end in a slot 32 receiving the pin 23 carried by the trigger 18.
  • the lever 29 is also slotted intermediate its ends as at 33, for the receptio'nof the pivot pin 30 in order that angular movementof the lever on the pin 30 maybe accompanied by lengthwise movement of the lever on. the pins .30 and 23. Qlockwise movement of the lever .29 as yiewe'd in l is opposed by a return spring'34 carried by the frame 2 so that as the cam actuating surface 31' of the lever escapes from the cam surface 28,
  • the locking means comprises a detentv 35 pivotally mounted ona pin 36 carried by the frame 2, the detent being urged into locking position in a recess 3-7 in the drum 1 by a spring 38 carried by the frame 2.
  • One such recess is provided for each of the chambers 5 in the plane of symmetry of the chamberin' the battery position.
  • the detent 35 includes a sear 39 whichis pivotally mounted as to 40 on the detent and is adapted to be'engaged by an actuating pin 41 of a pinion 42 which, in turn, operatively engages a rack- 43 on the hammer actuating shaft 19.
  • the pinion Pl1141 will engagethesear 39 to rotate the detent 3-5 in a counterclockwise direction against the action of" the spring 38 and thus free the detent from the recess 37.
  • the drum is now free to be rotated by the cam 27 driven by the lever 29, this rotation continuing until the next chamber is brought into battery position, at which time, the pinion pin 41 escapes from the sear 39 permitting the spring 38 to move the detent into the related recess 37 in this succeeding battery position.
  • a magazine unit '46 is detachably connected to the frame 2, the unit forming a handle for the gun and its interior providing a chamber 47 partitioned centrally between its side walls by a partition member 43 to pro- .vide right-hand and left-hand compartments adapted each to contain a verticalrow of cartridges in side ,by side relation.
  • the magazine unit' is open at its top and is detachably connected to the frame 2-by a bifurcated clamp 49 at the top of the partition member 48, the clamp havingoppositely depressed clamping flanges 50 seated in grooves 51 in the frame 2.
  • the magazine unit can be readily detached for loading with ammunition.
  • the right-hand an djleft-hand.
  • Means are provided for forcing th'e top-. most round intothe empty chamber and as here preferably embodied eajch of the chambers is provided with a springpressed follower as at 54 and 55 respectively.
  • the follower 5. presses against the-bottom-- mo st round of the row of ammunition in the'chamber 52 thus urging.. the.topmost round into sliding contact with, the cylindricalsurface of the drum '1. :In Fig. 3
  • the drum 1 is shown in-cartridge ejecting position after having been rotated from the battery position'shown in Fig. 2.
  • the right-hand chamber 5 is empty and, i
  • the rotary drum 1 positioned at the open top of the magazine unit serves as 'a gating and conveying devicefor preventing the escape of ammunition from the magazine unit and for picking off the topmost round of the row of ammunition for conveyance to the battery position.
  • Means are provided for ejecting the empty cartridge case from the chamber after firing.
  • the drum 1 is slotted radially at the bottom "ofeach of the chambers 5 so asv to provide thereat a slot 56 within which is pivotally mounted an ejecting lever 57 in such fashion as to bear upon but not press against the opposing longitudinal apices of the cartridge 12 when thelatter is positioned in the chamber.
  • the lever 57 extends beyond the end 15 of the drum 1 into a well 58 in the frame .2, the well 58 being generally concentric with the drum shaft 3 but having a camming surface 59 (Fig. 3') extending inwardly toward the drum shaft 3.
  • the camming surface 59 is of a configuration suitable to depress the projecting end of the ejecting lever 57 as the magazine unit, as has been described above.
  • the'cartridge 12 is of non-circular contour externally and is received in the non-circular-chamber 5 of the drum, the chamber being capped or closed in the battery position'by the cylindrical breech surface 11. It will thereforebe apparent that the cylindrical breech surface 11 and the walls 6 of the open chamber 5 together form a closed chamberfor the cartridge 12 in the battery position.
  • the walls of this closed chamber are substantially continuous except for the joints at the opposite sides of the mouth of the chamber 5 where the walls 6 of the chamber abut the cylindrical breech surface 11.
  • the cartridge 12, as depicted in Fig. 4 is also of non-circular contour so that the expansion of gas within the cartridge on firing will tend to cause the arcuate walls 13 of the cartridge to take a circular contour.
  • each wall '13 is thereby firmly supportedthroughout its whole circumferential area by either the walls 6 of the open chamber 5 or the cylindrical breech surface 11 of the frame 2.
  • the cartridge walls :13 arereinforced at their intersections with each other so that at the joints of the closed chamber formed by thedrum 1 and the frame 2 in battery position, the cartridge case will be sufliciently strengthenedto ensure against any possibility of longitudinal bursting of the case at the joints under the pressureof the expanding gases.
  • Means are provided'within the cartridge case formed by the arcuate walls 13 for supporting a projectile or bullet 60'of cylindrical contour Wholly within the interior of the cartridge case and with its axis of revolution'in alignment with the axisof the bore of thebarrel 9, and for forming an obturating flange at the muzzle end of the cartridge case adapted to seal hermetically the joint between the cartridge case and the breech end of the gun barrel 9.
  • a cylindrical sleeve'lil jackets the bullet 60 and terminates at its one end in an annular radially extending flange portion 62 whose outer circum ferential periphery is of a configuration matching that of the interior of the ,case formed by the cartridge Walls 13.
  • a cartridge for an open chamber gun comprising a case of generally equilateral triangular configurationinteriorly" and exteriorly and from end to end, in parallel planes normal to the longitudinal axis of the case, and meansfor supporting'a bulletin the interior of said case in ,annularly spaced. relation thereto, said supporting means having connection with said case at one end thereof and forming an obturating flange thereat.
  • a cartridge case for an open chamber'gun of generally equilateral triangular configuration interiorly and exteriorly and from end to end, in parallel planes normal to its longitudinal axis, and means forming an obturating flange. at one end of the case comprising a sleeve portion in the interiorof said case in. annularly spaced relation thereto and an annular flange portion at one end of said sleeve portion sealingly connecting said sleeve portion to the corresponding end of said case.
  • a cartridge for. an opnchamber gun comprising? case of, uniform generally equilateral triangular configura tion .intei-iorlyand exten'orly. and from end toqend in parallel planes normal to the longitudinal axis ofthe case, a cylindrical sleeve oo-axial withsaid casein the interior'of said casein .circumferentially spaced relation.
  • an obturating flange sealingly connecting the other end of the case with the corresponding end of said sleeve, a bullet in said sleeve, and a combustible propellant in the interior of said case.
  • a cartridge for an open chamber gunoom prising a case whose shape in cross section and from end to end, is generally that of an equilateral. triangle, a sleeve in the interior of the-case and spaced therefrom, a bullet carried by said sleeve and located wholly within the interior of said case, an. obturating flange sealingly connecting the case and. sleeve atbne'endof the case, and a unit, closingtheothei-end. Y i I; : ⁇ 7.
  • Arhmunition for an open chamber. gun comprising a g ca'se of generally equilateral; triangular configuration interiorlyand exteriorly and from end toend, in parallel advantageously, this flange portion 62; may be formed: 15
  • the cas an means for supporting a projectile in the interior of said case, said supporting means having sealing connection with said case at one end thereof and forming an obturating flange thereat.
  • said supporting means comprises a sleeve having a cy'lindrical bore for containing the projectile, said sleeve having an obturating flange at its outer end and having sealing connection with said case.
  • Ammunition for an open chamber gun comprising a case of generally equilateral triangular configuration interiorly and enteriorly and from end to end, in parallel planes normal to the longitudinal axis of the case, and means for supporting a projectile in the interior of the case and for forming a gas seal with the case, the support and seal-forming means having gas sealing connection with the inner surface of the case at one end thereof and providing an internal obturatting flange of uniform wall thickness thereat.
  • the case is of uniform generally equilateral triangular configuration and is thickened at the intersection of the case walls.
  • the supporting and seal-forming means providing the obturating flange at the one end of the case comprises a sleeve portion in the interior of the case in annularly spaced relation thereto and having a cylindrical bore for containing the projectile, and an annular flange portion at one end of the sleeve portion sealingly connecting the sleeve portion to the corresponding end of the case, the annular flange portion including a reentrant triangular skirt portion of uniform thickness having the gas sealing connection with the inner surface of the case.
  • Ammunition for an open-chamber gun comprising an elongated hollow body having a central cylindrical bore portion extending longitudinally of said body, for telescopical l y receiving a projectile to be propelled therefrom, the outer surface of said hollow body being of generally equilateral triangular configuration from end to end, in cross sectional planes normal to the cylinder axis 10 of said bore portion, one side of the triangular surface being arcuate.
  • each of the three sides of the triangular surface is arcuate and has the same radius of curvature.
  • Ammunition for an open-chamber gun comprising an elongated hollow body having three side walls and, at one of its ends, an end wall, said hollow body being of generally equilateral triangular configuration in crosssection and from end to end, said end wall lying at right angles to said side walls and sealingly connecting said side walls together at the same end of each to form, a closure for said body at said end, and said side walls each having a convex arcuatc outer surface portion whose radius of curvature is the same for each side wall.
  • each said side wall has a wall thickness at its intersection with each of the other two side walls, which is greater than its wall thickness midway between its intersection with said other two side walls.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US733162A 1954-09-03 1958-05-05 Ammunition for open chamber guns Expired - Lifetime US2983223A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL101796D NL101796C (fr) 1954-09-03
NL200147D NL200147A (fr) 1954-09-03
BE541050D BE541050A (fr) 1954-09-03
GB24900/55A GB789245A (en) 1954-09-03 1955-08-30 Improvements in or relating to open chamber gun and ammunition therefor
DED21207A DE1057500B (de) 1954-09-03 1955-09-02 Schusswaffe mit einer zylindrischen, absatzweise um ihre Achse drehbaren Patronentrommel und Patrone dafuer
CH347107D CH347107A (fr) 1954-09-03 1955-09-02 Ensemble comprenant une arme à feu et sa munition
FR1139598D FR1139598A (fr) 1954-09-03 1955-09-03 Pistolet perfectionné et munition pour ce pistolet
US733162A US2983223A (en) 1954-09-03 1958-05-05 Ammunition for open chamber guns

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US454045A US2865126A (en) 1954-09-03 1954-09-03 Open chamber gun
US733162A US2983223A (en) 1954-09-03 1958-05-05 Ammunition for open chamber guns

Publications (1)

Publication Number Publication Date
US2983223A true US2983223A (en) 1961-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US733162A Expired - Lifetime US2983223A (en) 1954-09-03 1958-05-05 Ammunition for open chamber guns

Country Status (7)

Country Link
US (1) US2983223A (fr)
BE (1) BE541050A (fr)
CH (1) CH347107A (fr)
DE (1) DE1057500B (fr)
FR (1) FR1139598A (fr)
GB (1) GB789245A (fr)
NL (2) NL101796C (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165058A (en) * 1962-12-10 1965-01-12 Robert G Lahr Toy cartridges
US3601061A (en) * 1967-08-31 1971-08-24 Trw Inc Ammunition for high firing rate, light gas hypervelocity gun
CN103206895A (zh) * 2013-03-19 2013-07-17 陕西科技大学 组合弹膛式转膛枪
US8763508B2 (en) 2009-07-22 2014-07-01 Prometheus Solutions, Inc. High attrition, rapid dispersal X 8 (H.A.R.D. 8) extreme rate of fire weapon system
US8898947B2 (en) 2012-09-17 2014-12-02 Open Chamber Systems, Llc Open chamber mechanism
CN106382845A (zh) * 2016-11-10 2017-02-08 数字鹰科技盐城有限公司 一种实现枪械连续发射的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU206232B (en) * 1989-11-24 1992-09-28 Sandor Breiner Self-defence pistol of moving chamber magazine
US5299373A (en) * 1989-11-24 1994-04-05 Sandor Breiner Hand-gun with moving cartridge chamber magazine
HU1700049V0 (hu) 2017-03-24 2017-08-28 Janos Palocska Ütõszeg védõ szerkezeti kialakítás lõfegyverhez

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US650461A (en) * 1899-11-15 1900-05-29 John Terry Rifling of gun-barrels.
US1470591A (en) * 1920-04-20 1923-10-16 Behar Manoel Felix Gun and ammunition therefor
US1659625A (en) * 1926-02-26 1928-02-21 Albert A Cowan Rifle and bullet
US1896515A (en) * 1931-03-26 1933-02-07 Otto V Huffman Ammunition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US650461A (en) * 1899-11-15 1900-05-29 John Terry Rifling of gun-barrels.
US1470591A (en) * 1920-04-20 1923-10-16 Behar Manoel Felix Gun and ammunition therefor
US1659625A (en) * 1926-02-26 1928-02-21 Albert A Cowan Rifle and bullet
US1896515A (en) * 1931-03-26 1933-02-07 Otto V Huffman Ammunition

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165058A (en) * 1962-12-10 1965-01-12 Robert G Lahr Toy cartridges
US3601061A (en) * 1967-08-31 1971-08-24 Trw Inc Ammunition for high firing rate, light gas hypervelocity gun
US8763508B2 (en) 2009-07-22 2014-07-01 Prometheus Solutions, Inc. High attrition, rapid dispersal X 8 (H.A.R.D. 8) extreme rate of fire weapon system
US8898947B2 (en) 2012-09-17 2014-12-02 Open Chamber Systems, Llc Open chamber mechanism
US9163900B2 (en) 2012-09-17 2015-10-20 Open Chamber Systems, Llc Open chamber ammunition
CN103206895A (zh) * 2013-03-19 2013-07-17 陕西科技大学 组合弹膛式转膛枪
CN103206895B (zh) * 2013-03-19 2015-02-25 陕西科技大学 组合弹膛式转膛枪
CN106382845A (zh) * 2016-11-10 2017-02-08 数字鹰科技盐城有限公司 一种实现枪械连续发射的方法

Also Published As

Publication number Publication date
CH347107A (fr) 1960-06-15
NL200147A (fr)
NL101796C (fr)
DE1057500B (de) 1959-05-14
FR1139598A (fr) 1957-07-02
GB789245A (en) 1958-01-15
BE541050A (fr)

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