US3489058A - Breech block for use in firing subcalibre training cartridges from recoilless weapons - Google Patents

Breech block for use in firing subcalibre training cartridges from recoilless weapons Download PDF

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Publication number
US3489058A
US3489058A US721654A US3489058DA US3489058A US 3489058 A US3489058 A US 3489058A US 721654 A US721654 A US 721654A US 3489058D A US3489058D A US 3489058DA US 3489058 A US3489058 A US 3489058A
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United States
Prior art keywords
breech block
cartridge
firing
subcalibre
cap
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
US721654A
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English (en)
Inventor
Erik Wilhelm Wallberg
Karl-Erik Andersson
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.)
Foersvarets Fabriksverk
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Foersvarets Fabriksverk
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Publication date
Application filed by Foersvarets Fabriksverk filed Critical Foersvarets Fabriksverk
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Publication of US3489058A publication Critical patent/US3489058A/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
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • 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
    • F41A1/00—Missile propulsion characterised by the use of explosive or combustible propellant charges
    • F41A1/08—Recoilless guns, i.e. guns having propulsion means producing no recoil
    • 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
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/57—Firing mechanisms operating with primer cartridge
    • 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
    • F41A33/00—Adaptations for training; Gun simulators

Definitions

  • a breech block for firing subcalibre cartridges from recoilless weapons said breech block having a firing pin for the subcalibre cartridge which is actuated by an explosive charge in an auxiliary cartridge, there being a rearward opening from a chambef containing said auxiliary cartridge through which a rearwardly directed flame is fired in order to simulate the actual function of the weapon when it is fired with full calibre cartridges.
  • the present invention relates to a breech block for use in training military personnel for firing recoilless weapons with side triggering.
  • An object of the present invention is to imitate the actual function of a recoilless weapon when it is fired with a full calibre cartridge.
  • a special round or frame to be inserted in the barrel of the recoilless weapon, said round or frame comprising a subcalibre barrel.
  • said round or frame there is an easily removable breech block which is provided with a fastening means for the subcalibre training ammunition and with means for firing said ammunition.
  • said firing means comprises at least one firing pin, a hammer, and a safety catch.
  • the present invention relates to a breech block which is provided with a cartridge chamber for an auxiliary cartridge which is adapted to actuate said firing pin to engagement with the subcalibre cartridge and by this means to provide a substitute for the hammer.
  • a rearwardly directed flame opening from said auxiliary cartridge chamber through which a rearwardly directed flame is being projected, in order to simulate the actual function of the recoilless arm when it is used together with ammunition of full calibre.
  • FIG. 1 is a longitudinal section of a breech block according to the invention.
  • FIG. 2 is a transversal section of said breech block along the line II-II in FIG. 1,
  • FIG. 3 is a section through a cartridge receiving frame or round to be used in a recoilless arm, with a breech block according to the invention, said round comprising a barrel for a subcalibre cartridge,
  • FIG. 4 is a section along the line IV-IV in FIG. 3, as viewed in the direction of the arrows,
  • FIG. 5 is a view from the rear of the device shown in FIG. 3 and illustrating the breech block in a safety and a non-safety position
  • FIG. 6 is a rear view of the breech block illustrating two different positions of a tiltable side portion of said breech block
  • FIG. 7 is a longitudinal section through the upper half of the breech block illustrating a safety device in its non-safety position.
  • the breech block is designated I.
  • Said breech block is provided with a flange 2 at the front end thereof, said flange 2 forming one part of a bayonet fixing, as will be apparent from FIG. 4, and serving for keeping the breech block fastened in a special round or frame 32, as will be described in connection with FIGS. 3 and 4, said round or frame 32 being in turn adapted to be inserted in the rear end of a recoilless weapon.
  • a fitting 3 for keeping a subcalibre training cartridge and behind said fitting 3 there is a longitudinal bore 4 for a firing pin 5.
  • the firing pin 5 is kept in a rear, rest position by a helical spring 6, against a stopper 7.
  • the firing pin 5 is provided with a flange 8 located in an enlarged portion 4a of the bore 4, said enlarged portion 4a having a length exceeding the axial length of the flange 8.
  • the movement of the firing pin 5 is thus limited to the distance between the flange 8 and the annular surface 9 between the bore 4 and the enlarged portion 4a.
  • the breech block is provided with a laterally open chamber 10, said chamber having the shape of a cylindrical transverse bore, the central line of said chamber 10 being located in the same plane as the central line of the bore 4, but disposed at a right angle to the latter.
  • the chamber 10' is intended to receive an auxiliary cartridge, not shown, the envelope of which being made of a flexible, plastic material and having a mantle wall which engages the rear end surface of the flange 8 of the firing pin 5.
  • the breech block is provided with a bore 11 which communicates with the cartridge chamber 10 and forms a rearwardly directed opening from the chamber 10.
  • the bore 11 is coaxial with the bore 4.
  • the laterial opening of the chamber 10 is covered by a side portion 1a comprising a number of parts which are kept together.
  • the outermost member 12 of said side portion 1a has the shape of a cap which partly covers the other parts and has an outer surface 13 which is matched to the cylindrical, inner surface of the opening in the round 32, FIG.
  • a second firing pin 16 is located, the igniting tip of which is located just in the centre of the opening of the chamber 10. Said second firing pin 16 is adapted to ignite the auxiliary cartridge received in said chamber 10.
  • the cap-shaped member 12 is arranged to be displaced inwardly together with the firing pin 16 against the force of a helical spring 17, surrounding said firing pin 16.
  • This displacement is a parallel displacement of the member 12, and for that purpose, the member 12 is guided by means of two guiding pins 18 which are fastened in an inner part belonging to the tiltable side portion 1a and which are freely. penetrating slots 19, 20 in the side parts of the cap-shaped member 12.
  • the guiding pins 18 are shaped as slotted, tubular members which are forced into bores in said inner part and kept in place by spring action of said tubular members.
  • the breech block By turning the breech block, the latter can be moved into one or the other of two positions, one of which is a safety position and the other is a non-safety position.
  • the cap-shaped member 12 In the non-safety position shown in full lines in FIG. 5, the cap-shaped member 12 is located under a detonating cap 30 which is adapted to be actuated by a lateral triggering device belonging to the recoilless weapon.
  • the cap-shaped member 12 is arranged to be pressed inwardly by the gas pressure developed by said detonating cap 30.
  • the capshaped member 12 is located laterall of said detonating cap 30. In this position, firing of the recoilless weapon will not result in any displacement of the member 12 and, therefore, does not result in ignition of the auxiliary cartridge received in the chamber 10.
  • a safety catch is provided by an inner member 21, belonging to the tiltable side portion 1a.
  • the member 21 is slidable in the longitudinal direction of the breech block.
  • the member is kept in the safety position illustrated in FIG. 1, by a helical spring 22. In this position two projections 23, 24 are located opposite to two corresponding projections 25, 26 belonging to the cap-shaped member 12, and by this means the cap-shaped member 12 with the firing pin 16 can not be displaced inwardly.
  • the chamber is open and freely accessible when the breech block is removed from said frame 32 and when the side member 1a of the breech block is tilted up to the position shown by dash-dotted lines in FIG. 6.
  • a cartridge may be inserted into the chamber 10 and, thereafter, the side portion 1a may be clasped down to the position shown in FIGS. 1 and 2.
  • the member 12 is, however, prevented from being pressed inwardly and, therefore, the cartridge received in the bore 10 cannot be ignited in this position.
  • a subcalibre cartridge is then inserted into the fitting 3 and the breech block is inserted into the round 32 and pressed inwardly and turned to a fixed position, whereby the safety device is made inactive as described in the foregoing.
  • the breech block Before firing the weapon, the breech block is further turned to the position in which the cap-shaped member 12 is located under the detonating cap in the round 32, as shown in full lines in FIG. 5.
  • a gas pressure is developed, which is sufiicient to rapidly press the member 12 inwardly and thereby also to press the firing pin 16 against the ignition cap of the auxiliary cartridge received in the chamber 10, so that the gunpowder in said cartridge will be ignited.
  • the gas pressure developed in the chamber 10 expands the flexible mantle wall of the auxiliary cartridge envelope into the opening of the bores 4 and 11.
  • the firing pin 5, the rear end surface of which is in contact with the auxiliary cartridge in the chamber 10, will now be pushed forwards, so that the left part of said firing pin will strike against the ignition cap of the subcalibre cartridge inserted into the fitting 3.
  • the mantle Wall of the auxiliary cartridge in the chamber 10 will be broken through where the bore 11 opens into the chamber 10.
  • the gunpowder gases are ex hausted rearwardly through the bore 11 and the report obtained from that exhaustion is considerably more powerful than the report from the firing of the subcalibre cartridge attached to the fitting 3. In addition to that, a flame will be projected rearwardly.
  • the breech block After firing, the breech block can be removed from the round 32 and, thereafter, the empty subcalibre cartridge attached to the fitting 3 and the rest of the plastic envelope of the cartridge in the bore 10 are removed and new cartridges are inserted in the said locations.
  • the breech block may again be inserted into the round 32 and, thereafter, the training weapon is again ready for use.
  • the training weapon may also be used charged with only the auxiliary cartridge received in the chamber 10' for blank firing exercise.
  • hinges connecting said side portion to said main body member for allowing said side portion to be tilted open to free the opening of said radial bore for enabling the exchange of said auxiliary cartridge to be made.
  • a breech block according to claim 3 in which said assembly of the main body member and the side portion are rotatable in said frame from an active position wherein said side portion registers with the opening of said radial chamber, to a safety position wherein said side portion is displaced from the opening of said channel.
  • a bayonet fitting is employed for locking said assembly in said frame, said locking taking place in said active and safety positions, but said assembly being unlocked and removable from said frame when in a position beyond either of said active or safety positions.
  • a breech block according to claim 5 including a slidable member between said cap-shaped member and said main body member, said slidable member being kept from being pressed inwardly, a projection on said slidable member which engages a projection on said frame when said assembly is inserted in the frame and causes the slidable member to be displaced against the action of said spring to a position where the said projections on the slidable member are outside of the path of movement of the corresponding projections on said cap-shaped member.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Lighters Containing Fuel (AREA)
US721654A 1968-04-16 1968-04-16 Breech block for use in firing subcalibre training cartridges from recoilless weapons Expired - Lifetime US3489058A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US72165468A 1968-04-16 1968-04-16
FR148251 1968-04-16
BE713793 1968-04-17
DE19681703206 DE1703206A1 (de) 1968-04-16 1968-04-17 Verschluss zur Verwendung beim Abfeuern von unterkalibrigen UEbungspatronen von rueckstossfreien Waffen
GB08235/68A GB1203673A (en) 1968-04-16 1968-04-17 A breech for use in firing sub-calibre training cartridges from recoilless weapons
NL6805454A NL6805454A (en, 2012) 1968-04-16 1968-04-18

Publications (1)

Publication Number Publication Date
US3489058A true US3489058A (en) 1970-01-13

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ID=27543094

Family Applications (1)

Application Number Title Priority Date Filing Date
US721654A Expired - Lifetime US3489058A (en) 1968-04-16 1968-04-16 Breech block for use in firing subcalibre training cartridges from recoilless weapons

Country Status (7)

Country Link
US (1) US3489058A (en, 2012)
BE (1) BE713793A (en, 2012)
CH (1) CH462671A (en, 2012)
DE (1) DE1703206A1 (en, 2012)
FR (1) FR1561673A (en, 2012)
GB (1) GB1203673A (en, 2012)
NL (1) NL6805454A (en, 2012)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018948A1 (en) * 1994-01-11 1995-07-13 Simbal Ab Practice weapon for a carried recoilless anti-tank weapon
ES2183682A1 (es) * 2000-06-14 2003-03-16 Instalaza Sa Cartucho para arma de entrenamiento con rebufo.
US7418896B1 (en) * 2004-12-08 2008-09-02 The United States Of America As Represented By The Secretary Of The Army Recoilless weapon system
WO2015102737A3 (en) * 2013-10-21 2015-09-24 Grant Kevin Paul A method and device for improving countermass-based recoil control in projectile launchers
US20160377375A1 (en) * 2015-05-12 2016-12-29 Mbda Deutschland Gmbh Launch system for a guided missile and a guided missile for such a launch system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2329451C2 (ru) * 2006-06-13 2008-07-20 Государственное Унитарное Предприятие "Конструкторское Бюро Приборостроения" (Гуп "Кбп") Приспособление учебной стрельбы

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB757195A (en) * 1953-12-01 1956-09-12 Nils Olov Malmstroem Practice projectile or cartridge for fire-arms with rearwardly recoiling propellant gases
DE1122876B (de) * 1957-08-26 1962-01-25 Foersvarets Fabriksstyrelse Fuer rueckstossfreie leichte Geschuetze bestimmte Lehrpatrone
GB936502A (en) * 1960-05-27 1963-09-11 Hanns Jurgen Diederichs Improvements in or relating to subcalibre practice ammunition
US3296928A (en) * 1964-02-22 1967-01-10 Nico Pyrotechnik Shooting training device with subcaliber tube for recoil-free weapon with telescopic tubes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB757195A (en) * 1953-12-01 1956-09-12 Nils Olov Malmstroem Practice projectile or cartridge for fire-arms with rearwardly recoiling propellant gases
DE1122876B (de) * 1957-08-26 1962-01-25 Foersvarets Fabriksstyrelse Fuer rueckstossfreie leichte Geschuetze bestimmte Lehrpatrone
GB936502A (en) * 1960-05-27 1963-09-11 Hanns Jurgen Diederichs Improvements in or relating to subcalibre practice ammunition
US3296928A (en) * 1964-02-22 1967-01-10 Nico Pyrotechnik Shooting training device with subcaliber tube for recoil-free weapon with telescopic tubes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018948A1 (en) * 1994-01-11 1995-07-13 Simbal Ab Practice weapon for a carried recoilless anti-tank weapon
US5811715A (en) * 1994-01-11 1998-09-22 Simbal Ab Practice weapon for a carried recoilless anti-tank weapon
ES2183682A1 (es) * 2000-06-14 2003-03-16 Instalaza Sa Cartucho para arma de entrenamiento con rebufo.
ES2183682B1 (es) * 2000-06-14 2004-12-16 Instalaza, S.A. Cartucho para arma de entrenamiento con rebufo.
US7418896B1 (en) * 2004-12-08 2008-09-02 The United States Of America As Represented By The Secretary Of The Army Recoilless weapon system
WO2015102737A3 (en) * 2013-10-21 2015-09-24 Grant Kevin Paul A method and device for improving countermass-based recoil control in projectile launchers
US9631882B2 (en) * 2013-10-21 2017-04-25 Kevin Paul Grant Method and device for improving countermass-based recoil control in projectile launchers
US20160377375A1 (en) * 2015-05-12 2016-12-29 Mbda Deutschland Gmbh Launch system for a guided missile and a guided missile for such a launch system
US9777989B2 (en) * 2015-05-12 2017-10-03 Mbda Deutschland Gmbh Launch system for a guided missile and a guided missile for such a launch system

Also Published As

Publication number Publication date
CH462671A (de) 1968-09-15
DE1703206A1 (de) 1972-01-13
GB1203673A (en) 1970-09-03
FR1561673A (en, 2012) 1969-03-28
NL6805454A (en, 2012) 1969-10-21
BE713793A (en, 2012) 1968-09-16

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