Coin discriminator with phase detection

Details Coin discriminator with phase detection Coin discriminator with phase detection

1989-03-01

1990-08-07

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

324 83R, G07D 508

Patent

active

049460196

ABSTRACT:
In a coin discriminator which compares a reference value to impedance magnitude variations induced by a coin, a phase detector detects the phases of the impedance variations and compares them with a standard to discriminate between the coins.

REFERENCES:
patent: 3316896 (1967-05-01), Thomasset
patent: 3473117 (1969-10-01), Ito
patent: 3966034 (1976-06-01), Heiman et al.
patent: 4174498 (1979-11-01), Preikschat
patent: 4409543 (1983-10-01), Sugihara
patent: 4460080 (1984-07-01), Howard
patent: 4574936 (1986-03-01), Klinger

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