US2939392A - Blank cartridge - Google Patents

Blank cartridge Download PDF

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Publication number
US2939392A
US2939392A US605267A US60526756A US2939392A US 2939392 A US2939392 A US 2939392A US 605267 A US605267 A US 605267A US 60526756 A US60526756 A US 60526756A US 2939392 A US2939392 A US 2939392A
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US
United States
Prior art keywords
cartridge
bullet
case
shoulder
shaped head
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
US605267A
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English (en)
Inventor
Huck Robert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2939392A publication Critical patent/US2939392A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B8/00—Practice or training ammunition
    • F42B8/02—Cartridges
    • F42B8/04—Blank cartridges, i.e. primed cartridges without projectile but containing an explosive or combustible powder charge

Definitions

  • This invention relates to a blank cartridge with a bullet-shaped head pushed on to the metal cartridge case but intended to be retained thereon when the cartridge is fired.
  • One object of the invention is to attach the bulletshaped head to the case in a simple way and in such a manner that it will not be blown off when the cartridge is red.
  • a further object of the invention is to construct the blank cartridge in such a way that inaccurately sized cases produced in the manufacture of live ammunition (rejected cases) as well as spent cartridge cases of fired live ammunition can be used for making blank cartridges.
  • Another object of the invention is to enable fired blank cartridge cases to be re-used.
  • the bulletshaped head should not only be suitably attached to the cartridge case to prevent it from being blown olf when the cartridge is red but that its removal from the case after the latter has been fired and ejected from the rearm should be easily possible.
  • VYet another object of the present invention consists in giving the blank cartridge a shape, powder charge, and performance that willl make it t for use in automatic fire-arms.
  • a further object of the invention consists in fashioning the blank cartridge in such a way that, apart from card-v board, the bullet-shaped head may be made of an elastic plastic material and be so designed that any reduction in its elasticity and mechanical strength under the influence of heat and cold will not inany way affect the reliability with which the head is held when the cartridge is red.
  • a further object of the invention consists in providing sqcient space inside the cartridge case for a powder charge that will produce the necessary volume of gas for the actuation of automatic fire-arms without however creating an undesirably high ⁇ gas pressure.
  • Another object of the invention is to provide a bulletshaped head that can be cheaply manufactured, a matter of particular importance when making the head of a plastic material.
  • Another object of the invention consists in ensuring that the tired and extracted blank cartridge in a machine gun or automatic fire-arm will be properly ejected and not cause the tire-arm to jam by being caught in front of the returning bolt after recoil. It is therefore a more particular object of the invention to provide a blank cartridge which in weight corresponds so far as possible with a live cartridge and in which the centre of gravity of the extracted part of the cartridge is located as nearly as end of the barrel 4. At the end of the tapering portion' Patented June?, 1960 possible in the same place as in the case of an extracted live cartridge case.
  • a further object of the invention is to make the blank cartridge resistant to deformation in the region of the shoulder and of the approximately cylindrical neck.
  • the invention consists in that the bullet-shaped head which externally embraces the forward cylindrical neck of the cartridge case is provided with a cone-shaped annular skirt Which bears against the shoulder of the cartridge case and which in the loaded firearm tlls or is compressed within the space between the shoulder of the cartridge case and the wall of the chamber at the rear end of the barrel.
  • the skirt is compressed into this space more particularly when the cartridge is red. Its compression is due to the pressure created inside the cartridge case by the combustion of the powder forcing the metal walls of the case outwards on to the walls of the chamber and thereby lirmly wedging the skirt between the cartridge and the chamber walls. At the same time the pressure of the powder gases inside the cylindrical neck of the case acting in the direction of the barrel walls has the effect of compressing that section of the bullet-shaped head which adjoins the skirt, and of thereby assisting in retaining the bullet-shaped head on the case.
  • the cartridge can be readily inserted into the chamberiand the case can be easily extracted.
  • the bullet-shaped head can be easily removed from the tired case after extraction either by pulling or tearing it off.
  • Plastic heads can be melted olf and cardf board heads or the like can be boiled off if required.
  • Fig. l is a blank cartridge according to the invention shown in side the chamber of a tire-arm and drawn on an enlarged scale;
  • Fig. 2 isv an enlarged representation of a detail of the blank cartridge according to Fig. 1;
  • FIG. 3 is another form of construction ⁇ of a blank cartridge according to the invention.
  • Fig. 4 is a detail of another form of construction similar to that shown in Fig. 3, the two latter drawings vbeing on a different scale to the rst.
  • the blank ⁇ cartridge 1 shown in Figs. 1 and 2, with which a tire-arm is assumed to have been loaded, comprises a metal case 2 with a tapering portion 2a which fits into the correspondingly shaped chamber 3 at the rear 2a facing the barrel is a shoulder 5.
  • the cartridge case 2 then extends to form a cylindrical neck 6.
  • An outwardly projecting ring 7 is worked into the cylindrical e neck 6.
  • Two grooves 8 are recessed into the neck, 'one on either side of the projecting ring.
  • Pushed over the cylindrical neck 6 is a bullet-shaped head 6 which is extended to form a slightly cone-shaped tubular skirt 10 ⁇ bearing against the shoulder 5. That part of the bullet ⁇ shaped head 9 which embraces the roughly cylindrical neck 6 ofthe cartridge caseV 1 is internallylgrooved for" .serted intothe interior of the case.
  • the bullet-shaped head is provided with a shoulder 11 which does not, however, kwhenlthe rearm is loaded make close contact with the shoulder 12 at the junction of the chamber and the barrel-4.
  • the outerwall V13 of the 'lip v1.0 of the skirt bearing against'the ,shoulder of the case ⁇ 2 abuts the angle 14 in ⁇ the'corresponding part of the AYchamber.
  • TheY bullet-shaped head has av suitably rounded nose 15 and is provided on its inside with a number of notches, ⁇ the disposition of for instance four such notches l16 Tbeing shown in the drawing Vofthe enlarged section illustrated in Fig. 2'. .Y
  • the bullet-shaped head 15 contains a plug 17 made .of felt or-the lke,..and a suitable quantity by weight'of powder topi-.Ovide a charge 18 is contained .in the powder chamber of the caseZ.
  • the blank cartridge functions as follows:
  • a modified form of construction of the blank cartridge isillustrated in Fig. 3 andi .shows the walls of the tapering ypart Sti-ofthe case which formsthe powder chamber thickened towards the base'of the cartridge.
  • the base 20 of the cartridge is fitted with a cap, not shown, and is provided with channels V'which communicate with .the in. terior of the cartridge.
  • VIt also has a lbevel edge y21. and an annular groove 22 above the'said edge, the bottom shoulder in the chamber wall and the outer .surfaceof the bullet-shaped head is in contact with the walls of the barrel up to the annularfzone 36.
  • the shoulder 24 presses the skirt 31 intothecorresponding angle in the chamber wall fwhereas .the adjacent section of the bullet-shaped head between the mouth 35 of theV cartridge case and the shoulder 24is firmly wedged between the roughly cylindrical neck 25 and the corresponding part of the barrel wall.
  • the beading26 is pushed into the cooperating groove in thebullet-shaped head.
  • annular beading 26 is embossed into the cylindrical neck 25, the lower lateral edge. 27 of which is perpendicular with reference to the ,longitudinal axis 4of .the cartridge. The edges i27 of the beading are rounded. Below ⁇ theshoulder 24 va felt plug 29 is..in Below thev felt lplug 29 is the powdercharge40. f Y
  • a bullet-shaped head 30 is pushed on to the Vcase shown in. Fig. 3. .
  • the bullet-shaped head 30 is provided with a cone-shaped skirt 31 which ybears on the shoulder 24 whereas its lower extremity 32 is butt ended.
  • the outer surface 33 of the tapering skirt 31 fits against a shoulder inside the chamber when the cartridgeis loaded into the breech.
  • Above lthe skirt 31 the bullet-Vshapedhead has an annular step 34. The mouth 35 of they cartridge case is located beyond ythis step. Y
  • the bullet-shaped head 30 is of uniform wall thickness extending from the step 34 upwardly as far .as a zone 36. vAbove thisV annular zone 36 the bullet-shaped head is domed V3'7 and its Wall thickness decreases.V Notches 38 are cut into the Vinsidegof the dome 37. Thefpresencey of the notches 38 produces a very'thin wall section in -the nose 39 of the head.V .
  • the bullet-shaped. head 30 is retained on the case, on thejone hand, by the 'beading'. 26 and on Vthe other handby the cone-shaped Iskirt which. is pressedv between the shoulder of the case Vand .the 'corresponding. angle in the chamber at Vthe end of the barrel rwhen thecartridge is ready for firing..
  • The'blank cartridge shown in Fig. 4 functions as has been hereinabove already'described.
  • the bullet-shaped head is retained in position on the cartridge case,rsub stantially as hasy been explained in connection with the preceding forms lof construction, Vby means of the conev 'hard synthetic plastic material suchasjpolythene, polyvinyl' chloride, or of cardboard, asbestos,plexiglass, vulcanised libre, or the like.
  • An elastic synthetic ⁇ is preferj able as this easily tears when the cartridge lis fired and is readily deflected against the barrel Walls owing toits elasticity.
  • the cartridge case may be brass, tombac (72-90%y copper, remainder Zinc), Vsteel, plated steel, copper, or-the like. l
  • the cartridge as well as 'the bullet-shaped head may also have some other shape to conform with the construction of the re-a-rm and that the vinvention must: not be deemed as being in anyfway limited by the illustrative examples that have .been described.
  • the felt plug maybe inserted -in -s'ome other Y position than that shown in'Figsfltol. "A preferred position is that 'illustrated in Fig. 3. Y
  • the bullet-shaped head, (9,. 30, l42) may also consist Ofmetal, especially lightjmetal such asaluminium -.or aluminium ⁇ alloy.
  • lightjmetal such asaluminium -.or aluminium ⁇ alloy.
  • the ldepth ofthegrooves 8 or the height of the annular beading -26 V has to .be smaller than shown in Fig. l and 3.
  • A-blank cartridge for a-fire-arm comprising a barrel
  • a cartridge chamber located at .the rear end of theV barrel and' having.. a .frusto-conical shoulder portion .at the rear of said chamber; said cartridge comprising a metal cartridge case having a forward cylindrical neck, a frustoconical shoulder located immediately behind the neck, and a sleeve-like body located behind the shoulder, a charge of powder located within the sleeve-like body, a bullet-shaped head comprising a weakened closed end, a skirt covering the forward cylindrical neck of the cartridge case and a frusto-conical extension of the skirt covering the shoulder of the cartridge case, the skirt and extension being arranged when loaded into the fire-arm to substantially ll the space within the cartridge chamber and frusto-conical portion thereof and externalto the neck and shoulder of the cartridge respectively, while the bullet-shaped head projects into the barrel of the rearm, whereby upon discharge of the blank cartridge the pressure of the gases arising from the powder charge causes the shoulder and neck on the cartridge case to expand and to hold fast the extension of the skirt

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Toys (AREA)
US605267A 1955-08-31 1956-08-21 Blank cartridge Expired - Lifetime US2939392A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE791208X 1955-08-31

Publications (1)

Publication Number Publication Date
US2939392A true US2939392A (en) 1960-06-07

Family

ID=6703458

Family Applications (1)

Application Number Title Priority Date Filing Date
US605267A Expired - Lifetime US2939392A (en) 1955-08-31 1956-08-21 Blank cartridge

Country Status (4)

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US (1) US2939392A (en(2012))
BE (1) BE550670A (en(2012))
FR (1) FR1157250A (en(2012))
GB (1) GB791208A (en(2012))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226458B (de) * 1961-08-12 1966-10-06 Dynamit Nobel Ag Zerfallgeschoss fuer Manoeverpatronen
US20190226818A1 (en) * 2018-01-21 2019-07-25 Vista Outdoor Operations Llc Muzzleloader systems
KR20200023608A (ko) * 2017-05-30 2020-03-05 테크벤쳐 인베스트먼트스 피티와이 엘티디 단일 밀봉형 발사체

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158408A3 (en) * 1984-02-14 1987-01-14 Hilvenna Limited Cartridge ammunition for small arms

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE71249C (de) * Freiherr D. VON REIBNITZ in Berlin W., Alvenslebenstr. 16 Platzpatrone
US726579A (en) * 1902-09-22 1903-04-28 Otto Schuette Blank cartridge.
US1933694A (en) * 1930-04-30 1933-11-07 C O Two Fire Equipment Co Electrically controlled actuating device
FR1081764A (fr) * 1953-06-27 1954-12-22 Munitions inoffensives bien qu'explosives pour tir à blanc
US2703529A (en) * 1947-08-29 1955-03-08 Arnold J Tuckerman Lining for perforated cartridge cases
FR1097001A (fr) * 1954-02-20 1955-06-28 Procédé de fabrication permettant une simplification de la production ainsi qu'un abaissement de poids de toutes munitions pour armes à feu de tous calibres
GB732633A (en) * 1953-06-27 1955-06-29 Ringdal Lars Improvements in ammunition cartridges

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE71249C (de) * Freiherr D. VON REIBNITZ in Berlin W., Alvenslebenstr. 16 Platzpatrone
US726579A (en) * 1902-09-22 1903-04-28 Otto Schuette Blank cartridge.
US1933694A (en) * 1930-04-30 1933-11-07 C O Two Fire Equipment Co Electrically controlled actuating device
US2703529A (en) * 1947-08-29 1955-03-08 Arnold J Tuckerman Lining for perforated cartridge cases
FR1081764A (fr) * 1953-06-27 1954-12-22 Munitions inoffensives bien qu'explosives pour tir à blanc
GB732633A (en) * 1953-06-27 1955-06-29 Ringdal Lars Improvements in ammunition cartridges
FR1097001A (fr) * 1954-02-20 1955-06-28 Procédé de fabrication permettant une simplification de la production ainsi qu'un abaissement de poids de toutes munitions pour armes à feu de tous calibres

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226458B (de) * 1961-08-12 1966-10-06 Dynamit Nobel Ag Zerfallgeschoss fuer Manoeverpatronen
KR20200023608A (ko) * 2017-05-30 2020-03-05 테크벤쳐 인베스트먼트스 피티와이 엘티디 단일 밀봉형 발사체
US20190226818A1 (en) * 2018-01-21 2019-07-25 Vista Outdoor Operations Llc Muzzleloader systems

Also Published As

Publication number Publication date
FR1157250A (fr) 1958-05-28
BE550670A (en(2012))
GB791208A (en) 1958-02-26

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