Timer circuit for vending machine

Details Timer circuit for vending machine Timer circuit for vending machine

1978-11-09

1981-03-31

Spar, Robert J.

Check-actuated control mechanisms

Including noncontacting, relatively movable parts connected...

194 9T, 194 10, 235 92PE, G07F 516, G06F 738

Patent

active

042588375

ABSTRACT:
The circuit includes a switch array for setting two conditions, one for defining the length of the vend period and the other for defining the coinage necessary to initiate the vend period. A binary counter is coupled by the switch array to a decoder circuit, and the binary counter is first counted incrementally in response to coinage insertion until the correct coinage has been received at which time the counter is enabled to continue counting through a timing cycle defining the vend period. At the end of the vend period the circuit is reset for future usage.

REFERENCES:
patent: 3428157 (1969-02-01), Patterson et al.
patent: 3478855 (1969-11-01), Seversen
patent: 3508636 (1970-04-01), Shirley
patent: 3604903 (1971-09-01), Hill et al.
patent: 3791505 (1974-02-01), Mandell
patent: 3820642 (1974-06-01), Levasseur

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