Monitoring the level of a stack of coins

Details Monitoring the level of a stack of coins Monitoring the level of a stack of coins

1987-05-20

1988-10-04

Chapman, John

Measuring and testing

Vibration

By mechanical waves

73163, 367908, 453 17, G01S 1508, G07D 900, G07F 900

Patent

active

047748419

ABSTRACT:
The level of a stack of coins in a stack tube is monitored by an ultrasonic transducer disposed above the stack tube. The transducer directs a train of ultrasonic pulses down towards the top of the stack and measures the transit time between the emitted and reflected pulses. The monitoring apparatus is particularly suitable for use in a gaming, amusement, vending or change machine which has a number of stack tubes from which coins are payed out by a payout device under the control of a control unit.

REFERENCES:
patent: 4092990 (1978-06-01), Bayne
patent: 4555942 (1985-12-01), Ludvigsson
patent: 4576286 (1986-03-01), Buckley et al.

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