US3146712A - Target practice ammunition of thermoplastic material - Google Patents

Target practice ammunition of thermoplastic material Download PDF

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Publication number
US3146712A
US3146712A US102615A US10261561A US3146712A US 3146712 A US3146712 A US 3146712A US 102615 A US102615 A US 102615A US 10261561 A US10261561 A US 10261561A US 3146712 A US3146712 A US 3146712A
Authority
US
United States
Prior art keywords
projectile
cartridge
thermoplastic material
target practice
casing
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
US102615A
Other languages
English (en)
Inventor
Maurer Waldemar
Koch Karl
Eisinger Emil
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Application granted granted Critical
Publication of US3146712A publication Critical patent/US3146712A/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
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
    • F42B12/74—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body
    • F42B12/745—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body the core being made of plastics; Compounds or blends of plastics and other materials, e.g. fillers
    • 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
    • F42B5/067—Mounting or locking missiles in cartridge cases
    • 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

Definitions

  • the present invention rela-tes to target practice ammunition of thermoplastic material, and more particularly to a target practice ammunition cartridge comprising an integrally connected cartridge shell and projectile having a predetermined place of fracture therebetween, said projectile having a rearwardly directed hollow portion.
  • thermoplastic material including a cartridge shell and a projectile integrally connected and having a predetermined place of fracture therebetween.
  • thermoplastic material has a density of below 1.
  • thermoplastic material which comprises means defining a cartridge shell and projectile therefore integral therewith, and means defining a predetermined place of fracture between the projectile and cartridge shell.
  • the projectile is provided with a bottom end, adjacent to the cartridge shell, having a hollow recess defined therewithin.
  • the integrally connected cartridge shell and projectile are made of thermoplastic material having a density below 1.
  • the preferred types of thermoplastic material used in accordance with the invention include polyethylene and polypropylene having a density below 1, and more particularly Ziegler-type low pressure polyethylene and polypropylene.
  • the cartridge shell will be preferably hollow in structure such that the hollow recess in the rearward portion of the projectile will register with the hollow portion of the cartridge shell.
  • an annular groove will be present ⁇ along the inner Wall of the cartridge, defining the predetermined place of fracture of the integral cartridge shell and projectile upon firing the cartridge from a suitable weapon. Therefore, the present invention provides a cartridge arrangement having a low projectile weight, affording a positive and clean separaion of the projectile from the cartridge shell upon firing and ensuring a good trajectory stabilization of the projectile after leaving the barrel.
  • a projectile composed of polyethylene suitable for a pistol cartridge having a calibre of 9 mm. parab. has a weight of only 0.4 g., while the same projectile made from metal weighs 8 g.
  • Such a polyethylene projectile upon firing at a gas pressure of only 420 atmospheres execess presure (guage) has a muzzle velocity of about 500 m./sec., whereas the same projectile made from metal at a gas pressure of 2400 atmospheres excess pressure (guage) possesses a muzzle velocity of only 340 m./ sec. Because of the high initial velocity of the polyethylene projectile of the present invention, the precision over short distances is very good. In consequence of the low weight, the projectile, however, over greater distances decreases very rapidly in speed and energy. For example, the velocity vlag, amounts to about only 320 m./sec. for a polyethylene plastic projectile of 4the foregoing type.
  • a rapidly decreasing trajectory of the plastic projectile of the present invention will positively occur whereby comparatively short distances will be achieved with the projectile.
  • a maximum travel of a plastic projectile of the foregoing type having a calibre of 9 mm. parab. amounts to about m.
  • a similar projectile composed of metal possesses a maximum distance of travel of about 1500 m.
  • thermoplastic pointed bullet or projectile in accordance with the invention having a calibre of 7.62 mm., shows a maximum distance of travel of about 300 rn., while the distance when the same projectile is made from metal amounts to about 4000 m.
  • the cartridge of the present invention is most advantageous for use as target practice ammunition where the need or desire for tiring only o-ver short distances is obvious.
  • the propellent gas pressure generated within the barrel of the weapon will be effectively utilized for improving the sealing of the projectile against the barrel wall during its passage through the bore of the gun.
  • the danger range in shooting weapons with cartridges in accordance with the invention may be kept substantially smaller than that involved in shooting with conventional cartridges, especially those possessing a heavy metal projectile of the usual type. Consequently, where the thermoplastic cartridges of the present invention supplant the customary cartridges now used, very substantial simplifications in planning, designing and constructing shooting range in stallations may be achieved. This is true since inherently a plastic cartridge of the type contemplated by the present invention will only be eifective over comparatively short distances and, therefore, will not involve a peril to life and limb beyond such short distances. Accordingly, less troublesome safeguards will be necessary with respect to the shooting gallery or shooting range and, of course, a smaller perimeter of danger area will be involved.
  • the accompanying ligure illustrates a thermoplastic cartridge of the invention such as, for example, that made from polyethylene plastic.
  • the projectile 1 and cartridge shell 2 are constructed in one piece and have therebetween a predetermined place of fracture 5 defined by an internal annular groove 3 located at the bottom end 1b of projectile 1 and the top ⁇ end 2a of cartridge shell 2. Groove 3 ensures a clean separation of the projectile thick wall 6 from the cartridge shell thin walled top end 2a upon ring of the weapon.
  • the plastic projectile 1 is provided with a hollow recess 4 extending inwardly from towards the top pointed end la thereof, said recess 4 terminating at about the middle part of the projectile.
  • the cartridge shell 2 is constructed in a hollow manner so that the same may contain the powder charge which upon detonation forces a clean separation of the projectile 1 from the shell 2 at annular groove 3 where the interconnecting wall 5 between projectile 1 and cartridge shell 2 is thinnest, and by reason of the gases generated the desired velocity is imparted to the projectile.
  • projectile 1 is provided with a hollow recess 4 directed towards its bottom or rearward end, such gases will be exerted outwardly upon the surrounding wall of recess 4, causing an eiective compression of the outer surface 7 of projectile 1 thereat against the adjacent portions of the barrel of the weapon from which the projectile is tired so as to produce an elfective seal between said projectile 1 and adjacent barrel wall.
  • thermoplastic material having a density below 1 may be used for constructing the cartridge of the invention, such as polypropylene plastic material.
  • Target practice ammunition of thermoplastic material comprising means defining a cartridge shell and projectile therefor completely integral therewith along their com-mon extent, and means dening a predetermined place of positive and clean fracture in a plane passing completely transversely between said projectile and said cartridge shell, said projectile having a bottom end adjacent to the cartridge shell provided with a hollow recess defined therein.
  • Target practice ammunition according to claim 1 wherein the integral cartridge shell and projectile are the bottom end 1b of the projectile mon extent, said projectile having a pointed top end and a bottom end adjacent to the cartridge shell top end and sealing off said shell top end, said projectile bottom end having a hollow recess centrally defined therein extending toward said projectile pointed top end and terminating at about the middle of said projectile, the interior of the hollow cartridge shell communicating directly with the hollow recess of said projectile, means defining an annular groove portion of decreased connection being provided in a plane passing completely transversely between said cartridge shell and said projectile serving as a predetermined place of positive and clean fracture between said shell and said projectile upon firing the cartridge, said cartridge being composed completely and homogeneously throughout of thermoplastic material having a density below about 1.
  • thermoplastic material is polyethylene
  • thermoplastic material is polypropylene
  • thermoplastic cartridge casing and means defining a thermoplastic projectile for said casingv said casing and projectile being completely integral with one another along their common abutting extentV and means defining a predetermined place of positive and clean fracture in a plane passing completely transversely between said casing and projectile, Said projectile having a bottom end provided with a hollow recess defined therein adjacent to the cartridge casingo 2.
  • Target practice cartridge wherein the integral cartridge casing and projectile are both Amade of thermoplastic material having a density below about l 3
  • Target practice cartridge of thermoplastic material comprising means defining a hollow thermoplastic cartridge casing having a bottom end portion and an open top end portion and defining an internal aperture for containing a propelling charge therewhithin and a thermoplastic projectile for Said icart ridge casing completely integrally connected therewith along their common extent said projectile having a pointed top end and a bottom end adjacent to the cartridge casing top end portion and sealing off said casing top end portionq said projectile bottom end having a hollow recess centrally defined therein extending toward said projectile pointed top end and terminating at about the middle of said projectileq the interior of the hollow cartridge casing communicating directly with the hollow recess of said pro jectile, means defining an annular groove portion of decreased connection being provided in a plane passing completely transversely between said cartridge casing and said projectile serving as a predetermined place of positive and clean fracture between said casing-and
  • thermoplastic material is polyethylene
  • thermoplastic material is polypropylene.
  • thermoplastic material comprising means defining a thermoplastic cartridge casing and means defining a thermoplastic projectile for said casing, said casing and projectile being completely integral with one another along their common abutting extent, and means defining a predetermined place of positive and clean fracture in a plane passing completely transversely between said casing and projectile, said projectile having a bottom end provided with a hollow recess defined therein adjacent to the cartridge casing,
  • Target practice cartridge wherein the integral cartridge casing and projectile are both made of thermoplastic material having a density below about lu 3
  • Target practice cartridge of thermoplastic material comprising means defining a hollow thermoplastic cartridge casing lhaving a bottom end portion and an open top end portion and defining an internal aperture for containing a propelling charge therewhithin and a thermoplastic projectile for Said cart ridge casing completely integrally connected therewith along their common extent, said projectile having a pointed top end and a bottom end adjacent to the cartridge casing top end portion and sealing off said casing top end portion, said projectile bottom end having a hollow recess centrally defined therein extending toward said projectile pointed top end and terminating at about the middle of said projectile, the interior of the hollow cartridge casing communicating directly with the hollow recess of said projectile, means defining an annular groove portion of decreased connection being provided in a plane passing completely transversely between said cartridge casing and said projectile serving as a predetermined place of positive and clean fracture between said casing-
  • Target practice cartridge according tov cl-aim 3 wherein said thermoplastic material is polyethylene 5.
  • Target practice cartridge according yto claim 3 wherein said thermoplastic material is polypropylene.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US102615A 1960-04-16 1961-04-12 Target practice ammunition of thermoplastic material Expired - Lifetime US3146712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED33116A DE1146785B (de) 1960-04-16 1960-04-16 Zieluebungsmunition aus thermoplastischem Kunststoff

Publications (1)

Publication Number Publication Date
US3146712A true US3146712A (en) 1964-09-01

Family

ID=7041604

Family Applications (1)

Application Number Title Priority Date Filing Date
US102615A Expired - Lifetime US3146712A (en) 1960-04-16 1961-04-12 Target practice ammunition of thermoplastic material

Country Status (7)

Country Link
US (1) US3146712A (de)
AT (1) AT248295B (de)
BE (1) BE602540A (de)
CH (1) CH381564A (de)
DE (1) DE1146785B (de)
GB (1) GB958945A (de)
NL (2) NL263526A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283720A (en) * 1965-06-15 1966-11-08 Remington Arms Co Inc Molded plastic shotshell
US3338167A (en) * 1962-03-17 1967-08-29 Karlsruhe Augsburg Iweka Disintegrating training ammunition for firearms
US3339487A (en) * 1964-02-28 1967-09-05 Dynamit Nobel Ag Cartridge
US3732826A (en) * 1971-04-09 1973-05-15 E Johnson Cartridge
US3906859A (en) * 1971-08-30 1975-09-23 First Round Research Inc Penetration resistant projectile and cartridge for conventional firearms
US3935816A (en) * 1974-01-09 1976-02-03 Howard S. Klotz Construction for cartridge
WO2001022026A2 (en) * 1999-09-21 2001-03-29 Olin Corporation Industrial ammunition
US6779461B1 (en) 1999-09-21 2004-08-24 Olin Corporation Industrial ammunition
US20050155511A1 (en) * 2003-12-29 2005-07-21 Neil Keegstra Extended range less lethal projectile
US11215431B1 (en) * 2020-09-11 2022-01-04 The United States Of America As Represented By The Secretary Of The Army Action proving/verification inert device for small arms

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3238268A1 (de) * 1982-10-15 1984-04-26 Dynamit Nobel Ag, 5210 Troisdorf Uebungspatrone mit kunststoff-geschoss oder -geschossnachbildung
DE3238269C2 (de) * 1982-10-15 1986-05-22 Dynamit Nobel Ag, 5210 Troisdorf Übungspatrone mit Plastik-Geschoß oder -Geschoßnachbildung
DE102013011851B3 (de) * 2013-07-16 2014-05-28 Elisabeth Dürschinger Induktiv aktivierbare Zündkapsel für Insassen- Rückhaltesysteme.
DE102014007809B4 (de) 2014-05-26 2017-02-16 Elisabeth Dürschinger Induktiv aktivierbare Zündkapsel für Insassen-Rückhaltesysteme

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE522888A (de) * 1953-06-27
US2342549A (en) * 1943-04-30 1944-02-22 Nat Fireworks Inc Drill round
US2862446A (en) * 1955-08-15 1958-12-02 Kupag Kumststoff Patent Verwal Cartridge
CA570609A (en) * 1959-02-17 W. Jernberg Erik Practice cartridge
DE1099398B (de) * 1959-10-06 1961-02-09 Dynamit Nobel Ag Platzpatrone aus Kunststoff

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE341991C (de) *
AT52236B (de) * 1909-12-11 1912-02-26 Erste Ungarische Conservenfabr Zielübungsgeschoß.
DE717471C (de) * 1939-12-14 1942-02-14 Krupp Ag Leicht zerlegbares UEbungsgeschoss
LU30936A1 (de) * 1950-08-18
DE1762925U (de) * 1957-09-06 1958-03-06 Josef Helmut Danzer Uebungspatrone.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA570609A (en) * 1959-02-17 W. Jernberg Erik Practice cartridge
US2342549A (en) * 1943-04-30 1944-02-22 Nat Fireworks Inc Drill round
BE522888A (de) * 1953-06-27
US2862446A (en) * 1955-08-15 1958-12-02 Kupag Kumststoff Patent Verwal Cartridge
DE1099398B (de) * 1959-10-06 1961-02-09 Dynamit Nobel Ag Platzpatrone aus Kunststoff

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338167A (en) * 1962-03-17 1967-08-29 Karlsruhe Augsburg Iweka Disintegrating training ammunition for firearms
US3339487A (en) * 1964-02-28 1967-09-05 Dynamit Nobel Ag Cartridge
US3283720A (en) * 1965-06-15 1966-11-08 Remington Arms Co Inc Molded plastic shotshell
US3732826A (en) * 1971-04-09 1973-05-15 E Johnson Cartridge
US3906859A (en) * 1971-08-30 1975-09-23 First Round Research Inc Penetration resistant projectile and cartridge for conventional firearms
US3935816A (en) * 1974-01-09 1976-02-03 Howard S. Klotz Construction for cartridge
US6779461B1 (en) 1999-09-21 2004-08-24 Olin Corporation Industrial ammunition
WO2001022026A3 (en) * 1999-09-21 2001-11-08 Olin Corp Industrial ammunition
WO2001022026A2 (en) * 1999-09-21 2001-03-29 Olin Corporation Industrial ammunition
US20050115389A1 (en) * 1999-09-21 2005-06-02 Olin Corporation, A Company Of The State Of Illinois. Industrial ammunition
US20050115444A1 (en) * 1999-09-21 2005-06-02 Olin Corporation, A Company Of The State Of Illinois. Industrial ammunition
US7066092B2 (en) 1999-09-21 2006-06-27 Olin Corporation Industrial ammunition
US7069863B2 (en) 1999-09-21 2006-07-04 Olin Corporation Industrial ammunition
US20070017405A1 (en) * 1999-09-21 2007-01-25 Olson Douglas D Industrial ammunition
US7252038B2 (en) 1999-09-21 2007-08-07 Olin Corporation Industrial ammunition
US7921779B1 (en) 1999-09-21 2011-04-12 Olin Corporation Industrial ammunition
US20050155511A1 (en) * 2003-12-29 2005-07-21 Neil Keegstra Extended range less lethal projectile
US7350465B2 (en) * 2003-12-29 2008-04-01 Neil Keegstra Extended range less lethal projectile
US11215431B1 (en) * 2020-09-11 2022-01-04 The United States Of America As Represented By The Secretary Of The Army Action proving/verification inert device for small arms

Also Published As

Publication number Publication date
GB958945A (en) 1964-05-27
NL113226C (de)
BE602540A (de)
DE1146785B (de) 1963-04-04
CH381564A (de) 1964-08-31
AT248295B (de) 1966-07-25
NL263526A (de)

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