Antirunaway device for hand grenade fuze
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsHarold W. Kruger, Ted Thuen
Life of this patent
Estimating the term…
Abstract
An antirunaway device for a hand grenade fuze utilizes a spring biased deted firing pin-slider assembly to interlock a torque biased rotatably held detonator assembly in an out-of-line "safe" position when the biased firing pin-slider assembly senses the absence of a restraining, properly functioning, axially aligned dashpot timer assembly. A slider blocking member is depressed into a groove provided therefor, by the slider assembly, to allow the detonator assembly to rotate into an in-line "armed" position when the slider assembly mechanically senses the presence of a properly functioning dashpot timer assembly, but remains in a blocking position when the timer is not properly functioning.
Claims4
An antirunaway device for a hand grenade fuze which comprises:
- body housing means for protecting said hand grenade fuze against environmental attack and for preventing inadvertent operation of said hand grenade fuze which includes:
- a tubular body member having a rear end, a forward end and an annular shoulder peripherally disposed thereon intermediate said rear end and said forward end, said forward end having an axial bore and an "O" ring groove therein said axial bore communicating with said "O" ring groove, said body member having a plurality detent holes transversely disposed therethrough and an axially aligned longitudinal cavity therein;
- a bracket member fixedly attached to said annular shoulder;
- a safety lever pivotally held by said bracket member;
- a safety pin detachably disposed in said lever and said bracket, said safety pin preventing inadvertent activation of said hand grenade fuze;
- a closure disc stakedly disposed in said rear end of said tubular body member;
- an "O" ring disposed in said "O" ring groove of said forward end of said tubular body member;
- foil means peripherally disposed on said body housing means for covering said plurality of detent holes;
- a tubularly shaped timer housing, slidably disposed in said axially aligned longitudinal cavity of said tubular body member, said timer housing having a closed staked front end, a partially open rear end, a counterbore positioned in said front end of said timer housing, and a detent arming hole and a firing pin detent ball hole each being transversely disposed therethrough;
- a housing cap stakedly positioned in said front end of said timer housing;
- dashpot timer means fixedly positioned in said counterbore of said timer housing for providing a time delay for said hand grenade fuze after removal of said safety pin and said safety lever;
- antirunaway-firing pin-slider assembly means, biasedly slidably detented in said timer housing, for mechanically detecting absence of said dashpot timer means or malfunctioning thereof and mechanically blocking the initiation of said hand grenade in response to the absence or malfunction of said dashpot timer means and for initiating said hand grenade fuze after said time delay has elapsed;
- rotary detonator means tortionally biased and slidably disposed in said rear end of said tubular body member, said rotary detonator means being in abutment with and detented by said antirunaway firing pin-slider assembly means;
- booster charge means slidably positioned in said rear end of said tubular body member intermediate said rotary detonator means and said closure disc;
- and
- a biased arming spring disposed in said rear end of said tubular body member intermediate said booster charge means and said closure disc.
Dependencies are inferred from the claim text.