Ordnance – Fuse setters – Combined with projecting – launching or releasing devices
Patent
1986-06-18
1987-03-17
Brown, David H.
Ordnance
Fuse setters
Combined with projecting, launching or releasing devices
73167, 324179, F42C 1700, G01D 366
Patent
active
046497960
ABSTRACT:
A method and apparatus for setting a time delay value in an electronic fuze of a projectile exiting the muzzle of a gun barrel, in which a single transmitter coil concentrically mounted to the gun muzzle is utilized both to sense the presence of the projectile at the gun muzzle and to inductively transmit a radio frequency signal having a duration proportional to the fuze time delay value to a receiver coil disposed on the projectile. The transmitter coil is energized from a radio frequency oscillator before the projectile is fired. As the front end of the projectile begins to emerge from the gun muzzle, its presence is detected by a change in the transmitter coil impedance, and the transmitter coil is automatically deenergized. The receiver coil is spaced from the front end of the projectile so that it is not inductively coupled to the transmitter coil, the transmitter coil is reenergized from the oscillator for a time period proportional to the fuze time delay value to be set, then again deenergized until the projectile has completely emerged from the gun muzzle. The signal received by the receiver coil is processed by circuitry within the projectile to set the fuze time delay value.
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Brown David H.
Elbaum Saul
Kennedy Alan J.
McDonald Tom
The United States of America as represented by the Secretary of
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