Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Patent
1991-12-10
1994-03-15
Bartuska, F. J.
Check-actuated control mechanisms
Including means to test validity of check
By testing material composition
324234, G07D 508
Patent
active
052939790
ABSTRACT:
Apparatus for more accurately distinguishing between metal objects including coins based on the affect of the object or coin on the electrical characteristics of a pair of tank circuits when the tank circuits are subjected to a charging pulse which ends at a time when the object or coin is in the field thereof. The tank circuits can be connected into different configurations with the fields of their respective coils positioned to be subjected to the object or coin to be distinguished. The tank circuits can have similar or different characteristics and the coils of the tank circuits can be arranged in an aiding or in an opposing relationship. The present apparatus may also include apparatus to provide automatic tuning and self adjustment using a comparison between a portion of a signal produced by ringing one or more tank circuits and a fixed reference voltage level.
REFERENCES:
patent: 3870137 (1975-03-01), Fougere
patent: 3901368 (1975-08-01), Klinger
patent: 3918563 (1975-11-01), Schwippert et al.
patent: 3918564 (1975-11-01), Heiman et al.
patent: 3918565 (1975-11-01), Fougere et al.
patent: 3966034 (1976-06-01), Heiman et al.
patent: 4091908 (1978-05-01), Hayashi et al.
patent: 4151904 (1979-05-01), Levasseur et al.
patent: 4254857 (1981-03-01), Levasseur et al.
patent: 4353453 (1982-10-01), Partin et al.
patent: 4432447 (1984-02-01), Tanaka
patent: 4436196 (1984-03-01), Crisp et al.
patent: 4460003 (1984-07-01), Barnes et al.
patent: 4492296 (1985-01-01), Dubey
patent: 4538719 (1985-09-01), Gray et al.
patent: 4546869 (1985-10-01), Dean et al.
patent: 4574935 (1986-03-01), Partridge
patent: 4574936 (1986-03-01), Klinger
patent: 4625852 (1986-12-01), Hoormann
patent: 4739869 (1988-04-01), Hoorman
patent: 4742903 (1988-05-01), Trummer
patent: 4851770 (1989-07-01), Fiori, Jr.
patent: 5158166 (1992-10-01), Barson
Bartuska F. J.
Coin Acceptors, Inc.
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