Resonant coil coin detection apparatus

Details Resonant coil coin detection apparatus Resonant coil coin detection apparatus

1992-03-23

1993-12-28

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

324225, 324236, G07D 508

Patent

active

052731510

ABSTRACT:
A coin detection apparatus is disclosed which is particularly suitable for low power applications. The coin detection apparatus utilizes a detector coil as part of a resonant circuit. The resonant circuit with no coin present in the detector coil has a damped impulse response. When a coin is present within the detector coil, the damping of the impulse response of the resonant circuit is increased. Periodic generation of an impulse input to the resonant circuit and measurement of the resulting impulse response enables the presence of a coin within the detector coil to be ascertained.

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