Electronic coin validator with improved diameter sensing apparat

Details Electronic coin validator with improved diameter sensing apparat Electronic coin validator with improved diameter sensing apparat

1983-08-24

1985-04-09

Tollberg, Stanley H.

Check-actuated control mechanisms

Including noncontacting, relatively movable parts connected...

73163, G07F 302

Patent

active

045096333

ABSTRACT:
An improved electronic coin validator responsive to detect a plurality of different denominations of valid coins. The validator is constructed around a microcomputer (60). A single coil (30) in the tank circuit of an oscillator is used to determined content. The output of the oscillator is rectified (111, 112) and filtered (115, 116) to give an output signal (120) having a magnitude proportional to the envelope of the oscillator output. An improved diameter detection arrangement using only two LED/optodetector pairs (32, 132, 35, 135) is used to determined diameter by determining the actual average velocity of the coin as it travels down the runway by the sensors and thus to calculate a chord length using the calculated average velocity and a time period (T3) measured as the coin passed the sensors. A plurality of vend prices may be set by the state of a plurality of dip switches (69) and the microcomputer also provides control signals (150, 156) to a laundry machine.

REFERENCES:
patent: 3653481 (1972-04-01), Boxall
patent: 3797307 (1974-03-01), Johnston
patent: 3918564 (1975-11-01), Heiman
patent: 3918565 (1975-11-01), Fougere
patent: 4234071 (1980-11-01), Le-Hong
patent: 4249648 (1981-02-01), Meyer
patent: 4267916 (1981-05-01), Black

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