Ball throwing machine

Details Ball throwing machine Ball throwing machine

1985-03-06

1986-04-01

Shapiro, Paul E.

Mechanical guns and projectors

Spring

Guided projectile

124 32, 124 39, A63B 6940

Patent

active

045791007

ABSTRACT:
A machine for propelling a ball comprising an elongated barrel having an axially compressible coil spring therein that is controlled by an axially reciprocable screw disposed coaxially with and internally of said spring. A nut is threadably engaged on the screw whereby said screw is axially advanced and retracted. A coupling on the end of the screw first engages then releases said spring.

REFERENCES:
patent: 1366577 (1921-01-01), Mahern et al.
patent: 3128753 (1964-04-01), Politzer
patent: 3192915 (1965-07-01), Norris et al.
patent: 3265391 (1966-08-01), Webb

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