Patent ID: 7490551

Claim:
A missile fuse, comprising: an ignition device ( 12 ); and a security means ( 30 ), intended to enable ignition of a missile only under predetermined conditions, including a detection device ( 35 ) configured i) to be sensitive to a dynamic air pressure arising at the missile ( 11 ) in flight, and ii) to enable the ignition of the missile when the dynamic pressure attains a predetermined value of dynamic pressure corresponding to a given speed of the missile, and further configured to prevent the ignition of the missile when the dynamic pressure does not attain the predetermined pressure value, wherein the detection device comprises a detector element ( 36 ) configured to be, under the influence of the dynamic air pressure, any of displaced and deformed, so as to enable the ignition of the missile if the dynamic pressure attains the predetermined value, and to prevent the ignition of the missile if the dynamic pressure does not attain the predetermined pressure value, wherein the detector element ( 36 , 50 ) cooperates with a mobile mechanical element ( 14 ), the mobile mechanical element ( 14 ) configured to be displaceable from an initial position to an ignition position after launch of the missile, the detector element ( 36 , 50 ) being configured i) to prevent the mobile mechanical element ( 14 ) from being displaced to the ignition position when the value of dynamic pressure is not attained, and ii) to move away from the mobile mechanical element, and thereby not prevent the mobile mechanical element ( 14 ) from being displaced to the ignition position, when the value of dynamic pressure is attained, wherein the mobile mechanical element consists of a detonator rotor ( 14 ), a periphery of the detonator rotor ( 14 ) being configured to cooperate with a section ( 55 ) of a flexible blade ( 51 ), and wherein the periphery of the detonator rotor ( 14 ) comprises i) a first retaining element ( 62 ) preventing rotation of the rotor to the ignition position when the section ( 55 ) is not lifted from the periphery, and ii) a second retaining element ( 63 , 64 ) configured to prevent the flexible blade ( 51 ) from moving away from the periphery when the rotation of rotor ( 14 ) has been prevented by the flexible blade ( 51 ).