Ordnance – Accelerating
Patent
1987-01-14
1988-03-29
Bentley, Stephen C.
Ordnance
Accelerating
124 3, 310 12, 338 21, 338 55, F41F 102
Patent
active
047335955
ABSTRACT:
A muzzle arc suppressor allowing rapid repetitive refiring of railguns. A varistor or varistors electrically connect the muzzle ends of a railgun. Resistive inserts are placed inside the rails near the muzzle end. When the railgun projectile reaches the resistive inserts, the voltage across the varistor increases to above the varistor breakdown voltage, thereby commutating the railgun current from the projectile to the varistor, and dissipating excess magnetic energy through resistance heating of the varistor. The varistor is preferably made of zinc oxide, which is temperature invariant over a wide temperature range. The varistor may be pre-cooled to increase its energy absorbtion ability. A specific embodiment of the arc suppressor has the zinc oxide varistor conformably shaped to surround the rails. The conformably shaped varistor includes coolant passages.
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patent: 4480523 (1984-11-01), Young et al.
patent: 4572964 (1986-02-01), Honig
patent: 4641567 (1987-02-01), Creedon
Bentley Stephen C.
Sinder Fredric L.
Singer Donald J.
The United States of America as represented by the Secretary of
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