Safety-arming device for use in fuzes

Claim 2

In an inertia operated safety-arming device for a missile, the improvement comprising: a. a setback weight having first and second operating positions and being mounted for longitudinal reciprocal motion; b. means for locking said setback weight in said first and said second operating positions; c. means responsive to longitudinal acceleration forces normally encountered in missile flight for arming said device; d. first resilient means coupled to said setback weight for allowing said setback weight to travel a predetermined distance intermediate said first and second operating positions in response to acceleration forces encountered in normal missile flight; e. second resilient means coupled to said setback weight for allowing said setback weight to travel a distance greater than said predetermined distance to said second operating position in response only to acceleration forces greater than said acceleration forces encountered in normal missile flight; and f. control means coupling said arming means to said setback weight for permitting said arming means to return to a safe condition when said setback weight is locked in said second operating position and acceleration forces opposite to the acceleration forces for arming said device are applied.

Claim 3

The inertia operated safety-arming device of claim 1 wherein said first and second resilient means are two pair of coil compression return springs, respectively mounted on guide pins for guiding the longitudinal motion of said setback weight.

Claim 4

The inertia operated safety-arming device of claim 1 wherein said locking means comprises first and second notches in said setback weight cooperating with an electromagnetically operated latch.

Claim 5

The inertia operated safety-arming device of claim 1 wherein said control means includes a cam slot in said setback weight of sufficient width to permit said setback weight to travel to said second operating position and permit return of said control means to said safe condition.

Claim 6

In an inertia operated safety-arming device for a missile, the improvement comprising: a. a setback weight having first and second operating positions and being mounted for longitudinal reciprocal motion; b. means for locking said setback weight in said first and said second operating positions; c. a pair of eccentrically weighted geared together rotors pivotably mounted within said device and responsive to longitudinal acceleration forces normally encountered in missile flight for rotating said rotors to an armed position; d. first resilient means coupled to said setback weight for allowing said setback weight to travel a predetermined distance intermediate said first and second operating positions in response to acceleration forces encountered in normal missile flight; e. second resilient means coupled to said setback weight for allowing said setback weight to travel a distance greater than said predetermined distance to said second operating position in response only to acceleration forces greater than said acceleration forces encountered in normal missile flight; and f. control means connecting said setback weight and one of said rotors for permitting said rotors to return to a safe position from said armed position when said setback weight is locked in said second operating position and acceleration forces opposite to the acceleration forces for arming said device are applied.

Claim 7

In an inertia operated safety-arming device for a missile, the improvement comprising: a. a setback weight having first and second operating positions and being mounted for longitudinal reciprocal motion; b. means for locking said setback weight in said first and said second operating positions; c. a pair of eccentrically weighted geared together rotors pivotably mounted within said device and responsive to longitudinal acceleration forces normally encountered in missile flight for rotating said rotors to an armed position; d. first resilient means coupled to said setback weight for allowing said setback weight to travel a predetermined distance intermediate said first and second operating positions in response to acceleration forces encountered in normal missile flight; e. second resilient means coupled to said setback weight for allowing said setback weight to travel a distance greater than said predetermined distance to said second operating position in response only to acceleration forces greater than said acceleration forces encountered in normal missile flight; and f. control means connecting said setback weight and one of said rotors for permitting said rotors to return to a safe position from said armed position when said setback weight is locked in said second operating position and acceleration forces opposite to the acceleration forces for arming said device are applied.

Claim 8

The inertia operated safety-arming device of claim 5 wherein said first and second resilient means are two pair of coil compression return springs, respectively mounted on guide pins for guiding the longitudinal motion of said setback weight.

Claim 9

The inertia operated safety-arming device of claim 5 wherein said locking means comprises first and second notches in said setback weight cooperating with an electromagnetically operated latch.

Claim 10

The inertia operated safety-arming device of claim 5 wherein said control means includes A cam slot in said setback weight of sufficient width to permit said setback weight to travel to said second operating position and permit return of said rotors to the safe position.