Patent ID: 7357081

Claim:
A safety and arming unit for a spinning projectile fuze, said fuze including a fuze body ( 12 ) and a bearing body ( 14 ) which define a spherical cavity ( 16 ) therebetween, a spherical rotor ( 18 ) being rotatably mounted in said cavity, a detonator ( 20 ) being arranged in said rotor ( 18 ), a) said rotor ( 18 ) being surrounded by a rotor locking ring ( 28 ) which, in the safe position of the safety and arming unit ( 10 ) prevents the rotor ( 18 ) from a rotational movement through an acceleration ring ( 30 ) and a spring element ( 32 ) which interlockingly connects the acceleration ring ( 30 ) to the rotor locking ring ( 28 ), b) the rotor locking ring ( 28 ) being formed with a slot ( 36 ) so as to be spreadable open responsive to rotational and centrifugal forces into an open space ( 34 ); c) said acceleration ring ( 30 ) having an L-shaped cross-sectional profile with a contact limb ( 58 ) for the spring element ( 32 ) and a holding limb ( 60 ) for the rotor locking ring ( 28 ); d) said rotor ( 18 ) possessing a recess ( 22 ) into which a bushing ( 24 ) projects in the safe position of the safety and arming unit ( 10 ); e) said acceleration ring ( 30 ), upon the rotational and centrifugal force-generated spreading open of the rotor locking ring ( 28 ) into the open space ( 30 ), being blockable in that the holding limb ( 60 ) comes into contact with the spread-open rotor locking ring ( 28 ); and f) said rotor ( 18 ) being prevented from rotation into an axial armed position thereof until release of said bushing ( 24 ) into movement away from said rotor ( 18 ) effected by a second arming system.