Electronic coin validator

Details Electronic coin validator Electronic coin validator

1984-05-29

1986-04-01

Tollberg, Stanley H.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

G07F 302

Patent

active

045792178

ABSTRACT:
An electronic coin validator comprising an inductive coin sensor (10) producing a predetermined response to a valid coin and a coin equivalent circuit (18, 20) which can be switched by a switch (14, 16) into operable connection with the sensor to produce an effect on the coin sensor similar to that of a coin but with the coin absent, and a comparator (26) for comparing the two sensor responses. The arrangement has the advantage of ensuring stability against temperature drift, small mechanical changes, aging and the like, because these disturbances have the same effect on both of the signals which are compared for coin validation purposes.

REFERENCES:
patent: 4234071 (1980-11-01), Le-Hong

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