Coin detector for use in a coin acceptor

Details Coin detector for use in a coin acceptor Coin detector for use in a coin acceptor

2005-05-17

2005-05-17

Walsh, Donald P. (Department: 3653)

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

Reexamination Certificate

active

06892873

ABSTRACT:
A coin detector installed in the track of a coin acceptor at a back side of a face panel is constructed to include a frequency oscillation circuit, the oscillation circuit assembly being formed of two printed circuit boards symmetrically disposed at two sides of the track of the coin acceptor each printed circuit board having a spiral coil and adapted to measure the inductance value of the coin passing through, a frequency switching circuit for setting reference values, and a CPU adapted to compare the inductance value of the coin detected by the oscillation circuit assembly to reference values obtained from the frequency switching circuit so as to determine the authenticity and value of the coin detected.

REFERENCES:
patent: 3901368 (1975-08-01), Klinger
patent: 4441602 (1984-04-01), Ostroski et al.
patent: 4574936 (1986-03-01), Klinger
patent: 4678994 (1987-07-01), Davies
patent: 5411126 (1995-05-01), Seitz
patent: 6305523 (2001-10-01), House et al.
patent: 0.500.367 (1992-08-01), None

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