Patent ID: 7614346

Claim:
A projectile fuze having fuze electronics in which the time of flight (T) is programmable, including a timer/counter which counts up to the programmed time of flight (T)—minus a defined time value (Δt) where upon said timer/counter charges an electrical firing circuit, a mechanical safety and arming unit ( 16 ) configuring to switch a firing chain which includes an electrical detonator ( 24 ), a firing needle ( 20 ), a piercing detonator ( 22 ) and a booster charge ( 26 ), from a safe to an armed position of the safety and arming unit after a specific time interval, and a pyrotechnic force element ( 14 ), which is operatively connected with the fuze electronics and mechanically blocks the safety and arming unit ( 16 ) until there is reached the time of flight (T) minus the defined time value (Δt), where upon the electrical firing circuit is charged and the safety and arming unit ( 16 ) is unblocked so as to assume the armed position by initiation of the force element ( 14 ).