Ammunition and explosives – Cartridges – Telescoping powder charge
Patent
1990-05-17
1991-11-26
Tudor, Harold J.
Ammunition and explosives
Cartridges
Telescoping powder charge
102464, 102469, F42B 5045
Patent
active
050674072
ABSTRACT:
A cartridge case 68 for a cased telescoped ammunition round 10. Cartridge case 68 includes a spirally wrapped hollow cylindrical casing 12 fabricated from a thin sheet of spring tempered high carbon steel which partially unwinds at the time round 10 is fired from a gun, a rear seal 16, and a front seal 18. A control tube 20 is secured to rear seal 16 and a primer 26 is mounted in communication with the interior of control tube 20. Casing 12 has an axis of symmetry 14 which is also the axis of symmetry of round 10, and control tube 20. Seals 16, 18 each have side walls 42, 42' in which crimp grooves 50, 50' are formed. Each crimp groove includes a cam surface 52, 52. Rear and front portions 62, 64 of casing 12 are crimped into grooves 50, 50'. A projectile 22 provided with a booster piston 24 is mounted within round 10 with piston 24 being located within control tube 20. The main propellant charge 32 is positioned around control tube 20 and projectile 22, and a booster charge 28 is positioned within control tube 20. When round 10 is fired, axial growth of casing 12 forces portion 62, 64 to ride up cam surfaces 52, 52' expanding them, and the layers of casing 12 to partially unwind to accommodate the increase in circumference of casing 12. When the pressure within casing 68 returns to normal, portions 62, 64 act to retract end seals 16, 18 and the layers of casing rewind to return substantially to their there original dimensions.
REFERENCES:
patent: 2853945 (1958-09-01), Stealy
patent: 2866412 (1958-12-01), Meyer et al.
patent: 3009394 (1961-11-01), Kamp et al.
patent: 3873375 (1975-03-01), Bolen et al.
patent: 4041868 (1977-08-01), Rayle et al.
patent: 4197801 (1980-04-01), LaFever et al.
Honeywell Inc.
Hughes Edward W.
Tudor Harold J.
Udseth William T.
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