Coin sorter

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

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324DIG1, G07D 508

Patent

active

045573662

ABSTRACT:
A coin sorter has an AC bridge circuit including at least one bridge arm having a detecting coil disposed along a coin passage to detect a plurality of coin denominations. A reactance element, such as a fixed coil or capacitor, is connected in a second arm of the bridge, and a plurality of resistors connected in series are provided in a third arm of the bridge for obtaining fractions of the voltage developed across said third arm in response to the passage of different coins. Differential amplifiers receive the voltages from different taps between the resistors and compare these voltages with a voltage proportional to the voltage across the reactance element. The outputs of the differential amplifiers provide an indication of the coin denomination.

REFERENCES:
patent: 3749220 (1973-07-01), Tabiichi et al.
patent: 3870137 (1975-03-01), Fougere
patent: 4206775 (1980-06-01), Tanaka
patent: 4326621 (1982-04-01), Davies
patent: 4405895 (1983-09-01), Gerst et al.

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