Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Patent
1989-12-26
1991-07-02
Bartuska, F. J.
Check-actuated control mechanisms
Including means to test validity of check
By testing material composition
379146, G07D 508
Patent
active
050279351
ABSTRACT:
An electronic coin chute (ECC) for use in a public telephone station has only a small amount of electrical power available from the telephone line when examining coins for authenticity and denomination. To conserve power during the examination process, a plurality of coin quality sensors are used, each designed to use minimum power. Each sensor generates an oscillating magnetic field that interacts with the coin as it gravitates through the coin chute. By monitoring the output electrical signal from each coin quality sensor, the microprocessor is able to determine when the coin has moved beyond its field and, in response, power is removed from that sensor and applied to the next. After the coin's qualities have been measured, they are compared with stored acceptance limits. Power is removed from the last coin quality sensor and applied to a coin routing apparatus to guide accepable coins into a collection box.
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Application Ser. No. 368,619 filed 6/20/89.
Berg Eilert J.
Bowles Byron D.
York James D.
AT&T Bell Laboratories
Bartuska F. J.
Morra Michael A.
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