Foul line detector circuit

Details Foul line detector circuit Foul line detector circuit

1977-08-24

1979-03-13

Hum, Vance Y.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

A63D 504

Patent

active

041438744

ABSTRACT:
A light sensitive photocell activated foul line detector circuit utilized in the sport of bowling employs an integrated circuit IC to activate a silicone controlled rectifier SCR operating as a gated device to trigger a connected light indicator device or audible alarm device. A pair of transistors are employed with dual light channel photocell device to selectively activate a common buzzer channel circuit portion together with the activated one of the dual light channel photocell device.

REFERENCES:
patent: 3170689 (1965-02-01), Brown et al.
patent: 3743290 (1973-07-01), Crimmins et al.
patent: 3810148 (1974-05-01), Karsten et al.
patent: 3931514 (1976-01-01), Patterson
patent: 3949233 (1976-04-01), Gluck
patent: 3967111 (1976-06-01), Brown
patent: 3982759 (1976-09-01), Grant
patent: 4028690 (1977-06-01), Buckley et al.

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