Method and apparatus for handling beltless ammunition in a twin-barreled gun

• US 4,697,496 A
• Filed: 06/17/1985
• Issued: 10/06/1987
• Est. Priority Date: 06/17/1985
• Status: Expired due to Fees

• Current Assignee: Alliant Techsystems Incorporated (Northrop Grumman Corporation)
• Original Assignee: Hughes Helicopters Incorporated
• Inventors: Goldin, Morris
• Primary Examiner(s): Bentley, Stephen C.
• Assistant Examiner(s): JOHNSON, STEPHEN
• Application Number:
  US06/745,135
• Time in Patent Office: 841 Days
• Field of Search: 89/33.03, 89/13.05, 89/1.41, 89/156, 89/127, 89/126, 89/155, 89/33.4
• US Class Current: 89/33.03
• CPC Class Codes: F41A 9/35 Feeding multibarrel guns

Abstract

The loading, firing and ejection of beltless, cased ammunition is facilitated by the use of an oscillating breech having two breech chambers defined therethrough, which breech is disposed between two parallel ammunition chutes. Unfired rounds are provided to a load position in a first ammunition chute and the oscillating breech rotated to align one chamber with the load position. The unfired round is rammed into the aligned chamber, thereby forcing the spent cartridge just fired from the opposing end of the chamber into an eject position in a second opposing ammunition chute. Meanwhile, a second chamber within the oscillating breech is simultaneously aligned with a corresponding one of two barrel bores and fired. After firing, the oscillating breech rotates in the opposite direction to position the breech holding the just fired round in a position in alignment with the ammunition chutes while the breech having the unfired round just loaded therein is then positioned in alignment with a second one of the corresponding barrel bores. An unfired round is then loaded from the second ammunition chute, forcing the fired spent cartridge from the aligned chamber into an eject position in the opposing first ammunition chute. Therefore, unfired rounds enter through a first ammunition chute, are fed through a bore in an oscillating breech and then exit in the reverse direction in a second opposing ammunition chute. Similarly, a second group of unfired rounds are delivered through the second ammunition chute, loaded through a corresponding chamber in the oscillating breech and exit in the reverse direction through the opposing first ammunition chute.

Claims

1. An improvement in an automatic gun including a double-barrel each with a barrel bore having a longitudinal axis for alternately firing beltless cased ammunition from each barrel comprising:

an oscillating breech having two chambers defined therein, said oscillating breech having a longitudinal axis generally parallel to said longitudinal axes of said double barrels, said oscillating breech rotating in an oscillating cycle about said longitudinal axis of said breech to alternately position each one of said two chambers defined in said oscillating breech in alignment with a corresponding barrel bore defined in a respective one of said double barrels, said chambers defined in said oscillating breech being opened at each opposing end of each chamber to permit said beltless cased ammunition to be slidingly disposed therethrough;

means for rotating said oscillating breech in said oscillating cycle about said longitudinal axis of said oscillating breech, said means for rotating coupled to said oscillating breech;

a first ammunition chute generally disposed transversely with respect to said longitudinal axis of said oscillating breech;

a second ammunition chute transversely disposed with respect to said longitudinal axis of said oscillating breech and disposed opposite said first ammunition chute, said first and second ammunition chutes disposed on opposing sides of said oscillating breech and aligned generally in the same plane, said double barrels aligned below said plane of said first and second ammunition chutes, said oscillating breech alternately rotating each chamber of said oscillating breech in alignment with said first and second ammunition chutes and subsequently in alignment with a corresponding one of said barrel bores;

means for loading each said chamber when said corresponding chamber is rotated in an upward position in alignment with said first and second ammunition chutes, same means for loading including a cocked rammer arranged and configured to force said beltless cased ammunition from said first and second ammunition chutes into said oscillating breech, said beltless cased ammunition being loaded in each of said chambers from one of said first and second ammunition chutes thereby forcing said beltless cased ammunition previously loaded in said corresponding chamber therefrom into an opposing one of said first and second ammunition chutes; and

buffer means opposing each means for loading to buffer the shock of said beltless cased ammunition being forced through said corresponding chamber into said opposing ammunition chute by said means for loading, whereby said automatic gun is fired at a rapid rate using beltless cased ammunition in such a manner that delivery of unfired beltless cased ammunition to and spent beltless cased ammunition from said automatic gun is facilitated.

2. The improvement of claim 1 wherein said oscillating breech is a symmetrical binocular-shaped body in which said chambers are defined, said body having a longitudinal axis of symmetry parallel to the longitudinal axis of each of said chambers, and said oscillating breech being rotatable about trunnion pins extending from said body, said trunnion pins extending from said body and lying in a plane of symmetry between said two chambers and below said longitudinal axis of said body.

3. The improvement of claim 1 wherein said means for rotating said oscillating breech includes a cam follower extending from said breech, said cam follower slidingly engaging a cam plate, said cam plate reciprocating in a longitudinal direction parallel to the axis of rotation of said oscillating breech.

4. The improvement of claim 3 wherein said means for rotating further includes a reciprocating rod coupled to said cam plate for reciprocating said cam plate in said direction parallel to said axis of rotation of said oscillating breech, said reciprocating rod being coupled to a piston included within a pneumatic cylinder, said pneumatic cylinder having pressurized gas supplied thereto from said automatic gun.

5. The improvement of claim 3 wherein said means for rotating said oscillating breech includes a cam follower extending from said breech, said cam follower slidingly engaging a cam plate, said cam plate reciprocating in a longitudinal direction to the axis of rotation of said oscillating breech.

6. The improvement of claim 1 wherein said means for rotating includes a reciprocating rod and pneumatic cylinder including a piston therein and wherein said means for loading each said chamber including said cocked rammer is coupled to said reciprocating rod and wherein said means for rotating said oscillating breech further includes a shuttle valve communicating with said piston in said pneumatic cylinder, said shuttle valve reversing gas flow to said piston thereby reversing direction of movement of said piston, and wherein said means for loading includes a first extension extending from said rod and engaging each said rammer to cock said rammer and a second extension from said rod coupled to said shuttle valve to control switching of said shuttle valve whereby reciprocation of said piston and rod coupled thereto is self-actuating.

7. The improvement of claim 6 including an external source of compressed air wherein said rod is coupled in tandem with a pneumatic cylinder and booster cylinder, said rod being powered by said pneumatic cylinder driven by discharge gas from said automatic gun and by said booster cylinder driven by said external source of compressed air, said booster cylinder further including a second shuttle valve controlled by said second extension connected to said rod,

whereby said pneumatic cylinder and first shuttle valve and whereby said booster cylinder and said second shuttle valve provide two independent motive power sources in tandem for reciprocating said rod and causing said oscillating breech to rotate.

8. An improvement in an automatic gun system icluding multiple barrels comprising:

an oscillating breech having a corresponding multiple number of chamber defined therein, said oscillating breech having a longitudinal axis generally parallel to said longitudinal axes of said multiple barrels, said oscillating breech rotating in an oscillating cycle above said longitudinal axis of said breech to position each one of said plurality of chambers defined in said oscillating breech in alignment with a corresponding barrel bore defined in respective ones of said multiple barrels, said chambers defined in said oscillating breech being opened at each opposing end of each chamber to permit said ammunition to be slidingly disposed therethrough;

a first ammunition chute generally disposed transversely with respect to said longitudinal axis of said oscillating breech; and

a second ammunition chute transversely disposed with respect to said longitudinal axis of said breech and disposed opposite said first ammunition chute, said first and second ammunition chute disposed on opposing sides of said oscillating breech and generally aligned in the same plane with each other, said multiple barrels being offset from said plane in which said first and second ammunition chutes lie, said oscillating breech cyclically rotating each first and second ammunition chutes and subsequently in alignment with a corresponding one of said multiple barrel bores, whereby unfired ammunition is taken from one of said first and second ammunition chutes, fired by said automatic gun system, and returned to an opposing one of said first and second ammunition chutes.

9. The improvement of claim 8 further including means for loading each chamber within said oscillating breech when said corresponding chamber is rotated into a position in alignment with one of said first and second ammunition chutes, said means for loading disposing a round of ammunition from one of said first and second ammunition chutes into said corresponding chamber in said oscillating breech thereby forcing a spent round from said chamber into an opposing one of said first and second ammunition chutes.

10. A method for feeding beltless ammunition cartridges to an automatic gun including double barrels, wherein each barrel has a barrel bore defined therein and characterized by a longitudinal axis of said barrel bore, said method comprising the steps of:

delivering said beltless ammunition cartridges at a load position in a first and second ammunition chute, said ammunition chutes generally disposed transversely with respect to said longitudinal axis of said barrel bores of said double barrels;

forcing an unfired ammunition cartridge delivered to said load position within said first ammunition chute into a breech chamber defined in an oscillating breech disposed between said first and second ammunition chutes, said oscillating breech having a longitudinal axis generally parallel to said longitudinal axis of said double barrels and arranged and configured to oscillate about said longitudinal axis of said breech to alternately position each one of said two breech chambers defined in said oscillating breech alignment with said corresponding load position in said ammunition chutes; and

simultaneously forcing a spent ammunition cartridge from each corresponding breech chamber into an opposite one of said first and second ammunition chutes when said unfired ammunition cartridge is forced into said corresponding breech chamber during said preceding step of loading, whereby beltless ammunition cartridges may be delivered to an automatic gun having double barrels with quick and smooth action.

11. The method of claim 10 further including the step of aligning one breech chamber having an unfired ammunition cartridge just loaded therein during said step of forcing unfired ammunition therein with a corresponding barrel bore in preparation for firing said amumunition cartridge through said corresponding barrel bore, said alignment being effected by oscillatory rotation of said breech about said lontitudinal axis of said breech, said alignment of said one breech chamber rotating another breech chamber into alignment with said other load position in said other ammuntion chute in preparation for said step of forcing an unfired cartridge into said corresponding breech chamber.

12. The method of claim 11 wherein said steps of delivering, forcing said ammunition cartridge delivered to said load position within said corresponding ammunition chute into a breech chamber, simultaneously forcing a spent ammunition cartridge from each corresponding breech chamber into an opposite one of said first and second ammunition chutes, and aligning said breech chamber having an unfired ammunition cartridge just loaded therein with a corresponding barrel bore are cyclically repeated after the additional step of rotating said oscillating breech after said unfired ammunition cartridge has been fired, said breech being rotated to a load position corresponding with said second ammunition chute wherein said step of forcing said ammunition cartridge delivered to said load position in said second ammunition chute and simultaneously forcing a spent ammunition cartridge from said corresponding breech chamber into said opposing ammunition chutes is repeated and followed by a repitition of said step of aligning said breech chamber including an unfired ammuntion cartridge just loaded from said second ammunition chute with a corresponding barrel bore, whereafter said steps of delivering, forcing and simultaneously forcing are repeated with respect to the other one of said breech chambers defined in said oscillating breech.

13. An improvement in a method for feeding beltless ammunition cartridges to an automatic gun including a rotating breech and multiple barrels, wherein each barrel has a barrel bore defined therein characterized by a longitudinal axis of said corresponding barrel bore, said improvement comprising the steps of:

forcing an ammunition cartridge from a first one of two opposing ammunition chutes into said rotating breech, said rotating breech having a corresponding multiplicity of chambers defined therethrough, each chamber corresponding to at least one of said multiple barrels; and

simultaneously forcing a spent ammunition cartridge disposed in one of said chambers by a force exerted thereon by said ammunition cartridge delivered to a load position and disposed into said rotating breech by said step of forcing said unfired ammunition cartridge therein, said spent ammunition cartridge being disposed in an eject position in said opposing ammunition chute, movement of said spend cartridge being limited within said opposing ammunition chute so that said unfired ammunition cartridge being forced from said load position in said first opposing ammunition chute is retained in said rotating breech.

14. The improvement of claim 13 further including the step of rotating said rotating breech to align another one of said multiplicity of chambers defined in said rotating breech with a load position in a second one of said ammunition chutes and an eject position in said first ammunition chute.

15. The improvement of claim 14 further including the step of simultaneously rotating one of said multiplicity of chambers defined in said rotating breech, said chamber including an unfired ammunition cartridge and being rotating in alignment with corresponding one of said barrel bores in preparation for firing.

16. The improvement of claim 15 wherein said rotating breech includes two chambers defined therein, and where in said step of rotating, rotation of said rotating breech aligns a first one of said two chambers with a corresponding one of two barrel bores and the second one of said two chambers is aligned with said load position on said first one of said ammunition chutes and with said eject position on said second one of said ammunition chutes.