Electric indicator system for ball games

Details Electric indicator system for ball games Electric indicator system for ball games

1976-10-06

1978-05-30

Yusko, Donald J.

Communications: electrical

Systems

Game reporting

273 31, 273 61B, G08B 2100, A63C 1906

Patent

active

040926346

ABSTRACT:
An improved electric circuit and indicator system for a court game, such as tennis, using conductive elements on both the ball and outside the court playing area to activate an indicator when the ball drops outside the playing area; wherein said system includes means for deactivating said indicator when the ball contacts one of the playing lines to avoid erroneous indication caused by a skidding ball.

REFERENCES:
patent: 3883860 (1975-05-01), Von Kohorn
patent: 3982759 (1976-09-01), Grant

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