Synchronizing system for rapid-fire gun in a microballistic prin

Details Synchronizing system for rapid-fire gun in a microballistic prin Synchronizing system for rapid-fire gun in a microballistic prin

1981-09-23

1982-09-21

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

400121, B41J 302

Patent

active

043504477

ABSTRACT:
Apparatus for synchronizing the aiming and firing of the solid projectile gun of a microballistic printer or the like. In the preferred embodiment, a microphone acoustically coupled to an inlet used to supply pressurized air to the ball gun senses the pressure drop occurring in the ball gun pressure chamber when a ball is fired. The microphone output is used by the ball gun control system to determine when the ball has left the ball gun, allowing the ball gun to be redirected at a new target location. In alternative embodiments of the invention, a microphone disposed adjacent the muzzle of the ball gun and an optical detector are respectively used to sense when a ball has been fired.

REFERENCES:
patent: 3695246 (1972-10-01), Filippi et al.
patent: 3769627 (1973-10-01), Stone
patent: 3810194 (1974-05-01), Tokunaga et al.
patent: 3848509 (1974-11-01), Corn
patent: 3893126 (1975-07-01), Ascoli et al.
patent: 4046131 (1977-09-01), Clark et al.
patent: 4124849 (1978-11-01), Zahornasky et al.
patent: 4149807 (1979-04-01), Avison et al.
patent: 4150902 (1979-04-01), Brescia

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