Moving coin validation

Details Moving coin validation Moving coin validation

1986-04-22

1987-05-12

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

G07D 508

Patent

active

046642447

ABSTRACT:
A method and apparatus for validating a moving coin by detecting an oscillating signal generated in coils connected in a tuned oscillating circuit. A property of the signal which varies linearly with coin displacement in one direction for a first period and varies linearly in an opposite direction with coin displacement for a second period is measured. From measurements made during the first and second periods a signal characteristic of the coin, and substantially independent of the coin's velocity is derived. The coin is validated by comparing this signal with stored reference values.

REFERENCES:
patent: 4124111 (1978-11-01), Hayashi
patent: 4234071 (1980-11-01), Le-Hong
patent: 4361218 (1982-11-01), Van Dort
patent: 4460080 (1984-07-01), Howard
patent: 4538719 (1985-09-01), Gray et al.

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