Coin mechanism with a piezoelectric film sensor

Details Coin mechanism with a piezoelectric film sensor Coin mechanism with a piezoelectric film sensor

1999-06-03

2000-10-31

Kramer, Dean J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

G07D 508

Patent

active

061388130

ABSTRACT:
A coin mechanism includes a piezoelectric film sensor in contact with a coin debounce device. When a coin is inserted into the coin mechanism, the coin strikes the coin debounce device as it travels along a coin path. Micro-movement of the coin debounce device is sensed with the piezoelectric film sensor. The coin mechanism changes from a quiescent mode of operation to an active mode of operation in response to sensing the presence of the coin in the coin path. Coin recognition can then be performed. Overall power consumption of the coin mechanism can be reduced.

REFERENCES:
patent: 3918563 (1975-11-01), Schwippert et al.
patent: 4733766 (1988-03-01), Roberts et al.
patent: 4848556 (1989-07-01), Shah et al.
patent: 5407049 (1995-04-01), Jacobs
patent: 5407051 (1995-04-01), Wohlrab
patent: 5469952 (1995-11-01), Kershaw et al.
G.R. Crane, "Poly (vinylidene) Fluoride Used for Piezoelectric Coin Sensors," IEEE Trans. on Sonics and Ultrasonics, vol. SU-25, No. 6, pp. 393-395 (Nov. 1978).

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