Tennis ball feeder and random server

Details Tennis ball feeder and random server Tennis ball feeder and random server

1977-05-23

1980-05-20

Pinkham, Richard C.

Mechanical guns and projectors

Projectile impelled by coacting wheels

273 29A, 124 49, F41B 304

Patent

active

042034132

ABSTRACT:
A tennis ball server supplied by a motorized ball feeder comprised of a trough and rotating plate that feeds balls at one rate, and wherein the server is motorized to oscillate so as to vary elevation of trajectory at another rate and is also motorized to oscillate so as to vary the traverse at still another rate; the three dissimilar motorized rates providing unpredictably placed serves, with speed control over said serves.

REFERENCES:
patent: 2705945 (1955-04-01), Cavalier
patent: 3604409 (1971-09-01), Doeg
patent: 3766901 (1973-10-01), Cleary et al.
patent: 3785358 (1974-01-01), D'Angelo et al.
patent: 3807379 (1974-04-01), Vodinh
patent: 4002336 (1977-01-01), Beaver
patent: 4094294 (1978-06-01), Speer

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