Protective circuit for coin operated vending machines

Check-actuated control mechanisms – Including noncontacting – relatively movable parts connected...

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194 1E, G07F 102

Patent

active

042640008

ABSTRACT:
A coin operated vending machine has a pair of spaced conductors mounted on a coin chute and in position to be bridged by any electrically conductive liquid squirted into the coin slot. Bridging of the conductors by the liquid completes a circuit which disconnects vending circuitry from its power source. The spaced conductors are mounted on a non-conductive support which prevents a coin itself from contacting and bridging the conductors.

REFERENCES:
patent: 2893531 (1959-07-01), Hebel
patent: 3482110 (1969-12-01), Robinson
patent: 4062435 (1977-12-01), Chalabian
patent: 4080598 (1978-03-01), Cardone

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