Coin validators

Details Coin validators Coin validators

1997-01-08

1997-11-18

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

324674, G07D 508

Patent

active

056878290

ABSTRACT:
In a coin detection system, a coin passes between conductive plates which form a capacitor, which provides part of the frequency controlling capacitance of an LC tuned oscillator circuit. The presence of a coin between the conductive plates alters the capacitance, and consequently alters the output frequency of the oscillator circuit. The oscillator output is supplied to the clock of a counter, optionally following frequency division in a frequency divider. The counter counts the number of clock pulses received in a 10 ms period, and the count value is provided to a microprocessor via a shift register. The count value will be a measure of the frequency of the output of the oscillator. The microprocessor uses the output to determine whether a valid coin has been received, and if so, what the denomination of the valid coin is.

REFERENCES:
patent: 3169626 (1965-02-01), Miyagawa et al.
patent: 4089400 (1978-05-01), Gregory
patent: 4951800 (1990-08-01), Yoshihara

Affiliated with

Also associated with

Rating

Coin validators does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coin validators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coin validators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1559488