Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Patent
1987-06-30
1991-02-26
Skaggs, H. Grant
Check-actuated control mechanisms
Including means to test validity of check
By testing material composition
324227, 324236, G07D 508
Patent
active
049954970
ABSTRACT:
A coin discrimination apparatus discriminates authenticity and a denomination of a coin by oscillation magnetic fields of high and low frequencies in a low frequency band in which generated magnetic fluxes allow a coin to pass therethrough. A first oscillation coil for generating an oscillation magnetic field of a low frequency and a reception coil are arranged at coin contact and coin non-contact surfaces, respectively, of an inclined coin path to face each other. A second oscillation coil is arranged on the coin non-contact surface to be separated from the reception coil by a predetermined distance in a coin rolling direction and generates an oscillation magnetic field of a high frequency. The coin discrimination apparatus includes a first sensor circuit for detecting maximum values of changes in impedances of the oscillation coils and the reception coil upon passage of a coin, a second sensor circuit for detecting the changes in impedances when the changes in impedances of the first and second oscillation coils coincide with each other, and a CPU for discriminating authenticity and the denomination of the coin based on coin physical characteristics in accordance with the detection results from the sensor circuits.
REFERENCES:
patent: 3870137 (1975-03-01), Fougere
patent: 4124111 (1978-11-01), Hayashi
patent: 4385684 (1983-05-01), Sugimoto et al.
patent: 4462513 (1984-07-01), Dean et al.
patent: 4488116 (1984-12-01), Plesko
patent: 4601380 (1986-07-01), Dean et al.
patent: 4660705 (1987-04-01), Kai et al.
patent: 4705154 (1987-11-01), Masho et al.
Kai Osamu
Tachibana Hiroshi
Tsukada Masaaki
Kennemore Steven
Skaggs H. Grant
Tamura Electric Works Ltd.
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