US2288604A - Projectile - Google Patents

Projectile Download PDF

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Publication number
US2288604A
US2288604A US263256A US26325639A US2288604A US 2288604 A US2288604 A US 2288604A US 263256 A US263256 A US 263256A US 26325639 A US26325639 A US 26325639A US 2288604 A US2288604 A US 2288604A
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US
United States
Prior art keywords
bullet
barrel
jacket
projectile
core
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
US263256A
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English (en)
Inventor
Born Waldemar
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
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Publication of US2288604A publication Critical patent/US2288604A/en
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
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/16—Barrels or gun tubes characterised by the shape of the bore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/02—Driving bands; Rotating bands

Definitions

  • This invention relates to a fire arm and has particular reference to a projectile for a bullet and barrel system in which the bullet or pro-l jectile is deformed during its passage through the barrel froma larger initial calibre or maximum diameter down to a smaller muzzle calibre, in order to increase the propelling force imparted to the bullet.
  • Another object of the invention is to provide a deformable projectile which prevents the production of excessive gas pressures in the barrel and ensures an emcient guiding and centering action of the barrel on the cylindrical part of the buiiet and high firing precision.
  • Still another object of the invention is to construct the deformable projectile in such a manner that the energy required for its deformation is kept within moderate limits.
  • Still another object ci the invention is to prevent inflation, swelling or jamming of the bullet and e pecially of its-core due to the upsetting crescere exerted upon it by the powder gases.
  • stesi jacket additional jacket having hollow innathe same projectile after its tie- Fig. 5 shows a bullet in which the outer' jacket is drawn directly over the steel core.
  • Fig'. ⁇ 6 shows a bullet in which a layer of a plastic material is interposed between the outer jacket and the steel core.
  • Fig. 7 shows Ia bullet in which the outer cover is provided with one bulbed portion only for obtaining a stream line final shape of the bullet
  • Figs. 8 to 12 are exaggerated fragmentary axial sections of embodiments of a barrel and bullet system employing the projectile of my invention.
  • Fig. 8 shows a barrel in which the tapered portions of the lands extend into the conica part of the barrel.
  • Fig. 9 shows a barrel in which the lands extend further into the conical part of the barrel.
  • Fig. l0 shows e. barrel in which the conical portion has two different tapers, the maximum taperibeing immediately in front of the cartridge magazine or breech chamber.
  • Fig. l1 shows a barrel in which the taper follows a curve, having its maximum taper near the breech chamber.
  • Fig. l2 shows a barrel similar to Fig. 11, but with the maximum taper at the end of the conical part.
  • a core l of lead or the like is surrounded by a normal cover or jacket 2 in known manner.
  • an outer jacket 3 is drawn overt-he jacket 2 from the top end and surrounds the cylindrical part of the same in the form 'of two annular bulged or bulbed portions l.' in the bulbed state of the outer cover there is an axiai spacing left between the rear edge oi the same and the end edge oi the bullet while in a radial direction the end edge of the outer cover engages tightly the body oi the bullet.
  • the dimensions are .f
  • the normal jacket 2 of the bullet may be closed at the rearl end of the same, so as to protect the softer core of the bullet against the direct action of the powder gas, as shown in Fig. 3. l
  • the outer jacket 3 and its bulbed portions are subjected to the deformation required to eiect the requisite guiding of the bullet in the lands and grooves of the rifled portion of the barrel.
  • the maximum cross section or calibre of the portion of the bullet inside the outer jacket is made smaller than the smallest calibre or cross section within the lands in the cylindrical portion of the barrel.
  • bullets having a steel core and an outer jacket 3 it is also possible in bullets having a steel core and an outer jacket 3, to provide a thin layer of easily deformable or plastic material, 8, Fig. 6, such as soft lead or hard lead and the like between the outer jacket Sand' the core 6, or even to completely fill up the hollow spaces within the bulbed portions by such a material.
  • the intermediate layer 8 is then drawn out in the passage of the bullet through the barrel and assumes the ⁇ full length ofthe bullet, thus acting as a lubricant or antifriction means for they bullet.l
  • a further advantage is attained by the easily deformable intermediate layer in that in case of vlarge tolerances of thebullet .diameter and an excessive diameter of some bul-l lets, the steel core is not jammed in the barrel but the dllerence is compensated by deformation or displacement of the soft intermediate layer 8.
  • a bullet of a ballistically favourable tear or torpedo shape may be obtained by a construction as shown in Fig. 7.
  • the bullet I with its jacket 9 which may be slightly torpedoory tear-shaped, is provided with an outer cover II that is drawn over the jacket 9 from the-top end thereof and bulged or arched from the point I2 where the forwardly tapered front end of the projectile passes over into the middle and rear part thereof, towards the end of the projectile, in the form of a single bulb I3 the barrel.
  • FIG. 8 A barrel of this kind is shown in Fig. 8.
  • the conical part Il in this case begins right in front of the breech chamber I5 and bullet space I9 and has a maximum calibre corresponding to the,
  • portion I6 is rilied at I7 and thelands taper oii in the conical part I4, over adistance I8, in a similar'manner as with the conventional barrels.
  • the riiiing extends further into the conical part I4 by a distance I8', Fig. 9, and in some instances to a point near the cartridge magazine l5, in order to ensure the required degree of firing precision.
  • the lands are so formed, if possible, thatthe grooving or channelling work exerted with respect to the outer jacket is ⁇ kept at a low rate.
  • the lands maybe formed toV rise quite gradually from the inner walls'of the barrel, as
  • the barrels from which the projectiles are fired one depth of the rifling or grooves at 3 to 5 calibre lengths or 1:80 to 1:100.
  • the tapered part is u Accordingly, the real bullet bodies or any porin the breech chamber.
  • I may provide the conical portion of the bore inthe barrel with a high initial taper in front of the breech chamber I5, for example, in the manner shown in Fig. 10 in which a. short conical connecting portion 20 of an increased taper or pitch is provided between the long conicalportion of the barrel. bore may have a taper followingv a non-linear, curved characteristic having its maximum taper or pitch near the breech chamber or near the muzzle end, as shown by way of example at 2l in Figs. l1 and l2, respectively, whereby the special features, more particularly the explosion speed, of the respective gun-powder may be met or a rapid initial acceleration of the bullet may be effected.
  • FIG. 2a showing a cross sectional view through my novel projectile on the line A-B in Fig. 2, as it leaves the barrel which is shown in an end view.
  • the lands IB between the grooves Il of the rifling have formed corresponding channels or grooves in the outer jacket while intermediate the lands the engagement between the jackets 2 and 3 is less tight.
  • the portion of the barrel in which the rst acceleration and deformation is imparted to the projectile is made without any twist of the riiling, if any, in order to ensure that the outer jacket will be drawn out smoothly and exactly in the direction of the axis of the projectile, whereby the resulting precision is enhanced.
  • the smooth shape of the bullet core prevents the outer jacket from getting stuck at any intermediate point of the core and ensures a smooth sliding of the outer jacket along the core. Moreover, due to the provision of a separate normal.
  • a projectile comprising a core of a material liable to be deformed under the' explosive action of the associated charge, an inner jacket surrounding said core on all sides for preventing deformation of the same and an outer jacket which tightly engages said inner jacket at its front and rear ends and is bulged out in the vform of at least one annular bulb, said bulbed i respect to said core adjacent the rear end there- WALDEMAR BORN.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US263256A 1935-09-28 1939-03-21 Projectile Expired - Lifetime US2288604A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2288604X 1935-09-28
CH212874T 1939-03-23
BE433505T 1939-03-27
FR862288T 1939-03-28

Publications (1)

Publication Number Publication Date
US2288604A true US2288604A (en) 1942-07-07

Family

ID=32096533

Family Applications (2)

Application Number Title Priority Date Filing Date
US263256A Expired - Lifetime US2288604A (en) 1935-09-28 1939-03-21 Projectile
US373181A Expired - Lifetime US2345089A (en) 1935-09-28 1941-01-04 Gun barrel

Family Applications After (1)

Application Number Title Priority Date Filing Date
US373181A Expired - Lifetime US2345089A (en) 1935-09-28 1941-01-04 Gun barrel

Country Status (4)

Country Link
US (2) US2288604A (enrdf_load_stackoverflow)
BE (1) BE433505A (enrdf_load_stackoverflow)
CH (1) CH212874A (enrdf_load_stackoverflow)
FR (1) FR862288A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482132A (en) * 1943-03-10 1949-09-20 Rene R Studler Cartridge
US3011404A (en) * 1950-01-30 1961-12-05 Charles R Russell Liquid propellant squeeze-bore gun with deformable projectile sabot
US20050183617A1 (en) * 2004-02-23 2005-08-25 Macdougall John Jacketed ammunition
US20100018430A1 (en) * 2008-07-25 2010-01-28 Masinelli Kyle A Reinforced core bullet
US10048051B1 (en) * 2015-06-18 2018-08-14 Cutting Edge Bullets, LLC Firearm projectile
US12163749B2 (en) * 2021-11-11 2024-12-10 Benelli Armi S.P.A. Gun barrel assembly

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687591A (en) * 1949-10-31 1954-08-31 Us Army Rifled gun barrel with tapered chromium bore wall
US4527348A (en) * 1984-01-27 1985-07-09 D. C. Brennan Firearms, Inc. Gun barrel
USH1365H (en) * 1994-02-04 1994-11-01 The United States Of America As Represented By The Secretary Of The Air Force Hybrid gun barrel
US6427373B1 (en) * 1999-05-21 2002-08-06 Wil Schuemann Gun barrel rifling
US6805111B2 (en) * 1999-06-14 2004-10-19 Tippmann Pneumatics, Llc Gun
US7040310B2 (en) * 2002-06-05 2006-05-09 National Paintball Supply, Inc. Paintball projectile drop compensator
US7254913B2 (en) * 2004-11-12 2007-08-14 Smith & Wesson Corp. Revolver for firing high velocity ammunition
US20070069064A1 (en) * 2005-05-19 2007-03-29 National Paintball Supply, Inc. Barrel attachment for a gas gun
US7603998B2 (en) * 2005-06-30 2009-10-20 Kee Action Sports I Llc Barrel attachment for gas gun
USD561293S1 (en) 2005-11-29 2008-02-05 Kee Action Sports I Llc Barrel and barrel spin attachment for a compressed gas gun
RU2319103C1 (ru) * 2006-05-15 2008-03-10 Юрий Апполинарьевич Караник Боеприпас и ствол для его выстрела
DE102007045721A1 (de) * 2007-09-24 2009-04-02 Rheinmetall Waffe Munition Gmbh Geschützrohr zum Verschießen drallstabilisierter Geschosse
RU2477434C1 (ru) * 2011-12-01 2013-03-10 Николай Евгеньевич Староверов Орудие староверова (варианты)
USD748218S1 (en) * 2014-07-21 2016-01-26 Michael Ira Kera Gun barrel
CA3002331C (en) 2015-10-18 2022-10-04 William Reilly Sub-mass projectile for auto loading firearm and methods
US11187509B2 (en) * 2019-12-10 2021-11-30 Chris Lee Billings Bullet and casing projectile for rifled barrel
US11022394B1 (en) * 2020-05-29 2021-06-01 Skychase Holdings Corporation Multi bore barrel for pistol
US11493296B1 (en) 2021-10-07 2022-11-08 Frederick H. Kart Firearm barrel and method of improving projectile weapon accuracy, velocity and durability
US11473883B1 (en) * 2021-11-12 2022-10-18 Dennis Paul Sooter Caseless tapered-bore ammunition and firearm

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482132A (en) * 1943-03-10 1949-09-20 Rene R Studler Cartridge
US3011404A (en) * 1950-01-30 1961-12-05 Charles R Russell Liquid propellant squeeze-bore gun with deformable projectile sabot
US20050183617A1 (en) * 2004-02-23 2005-08-25 Macdougall John Jacketed ammunition
US20070163459A1 (en) * 2004-02-23 2007-07-19 Macdougall John Jacketed one piece core ammunition
US7980180B2 (en) 2004-02-23 2011-07-19 General Dynamics Ordnance And Tactical Systems-Canada Inc. Jacketed one piece core ammunition
US20100018430A1 (en) * 2008-07-25 2010-01-28 Masinelli Kyle A Reinforced core bullet
US10048051B1 (en) * 2015-06-18 2018-08-14 Cutting Edge Bullets, LLC Firearm projectile
US12163749B2 (en) * 2021-11-11 2024-12-10 Benelli Armi S.P.A. Gun barrel assembly

Also Published As

Publication number Publication date
BE433505A (enrdf_load_stackoverflow) 1939-04-29
CH212874A (de) 1940-12-31
US2345089A (en) 1944-03-28
FR862288A (fr) 1941-03-10

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