Check-actuated control mechanisms – Including noncontacting – relatively movable parts connected...
Patent
1983-12-12
1986-01-21
Camby, John J.
Check-actuated control mechanisms
Including noncontacting, relatively movable parts connected...
194DIG15, G07F 302
Patent
active
045652759
ABSTRACT:
For electronically sensing the proper entry of a coin into a slot machine, vending machine or the like, an upstanding chute extending from the slot of the machine has two pairs of opposed apertures formed therein. A coin falling through the chute successively intercepts light beams emitted by external light sources and normally falling on photodetectors through the apertures. The outputs from the photodetectors are used for measuring the period of time required for the coin to pass each pair of apertures and the period of time from the moment the coin starts passing the upper pair of apertures to the moment the coin completes passing the lower pair of apertures. The photodetector outputs are further utilized for detecting a reverse travel of the coin in the chute, as by the stringing of the coin by the customer. Additional embodiments provide for the detection of oversize and undersize coins from the photodetector outputs.
REFERENCES:
patent: 3921003 (1975-11-01), Greene
Camby John J.
Sigma Enterprises Incorporated
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