DEVICE WHICH CHECKS VALIDITY OF TOKENS Russian patent published in 1998 - IPC

Abstract RU 2107325 C1

FIELD: check point equipment, in particular, token machines in metro. SUBSTANCE: device has light source, which is connected to controlled direct current power supply, photodetector which is connected to threshold circuit for signal generation, additional photodetector and signal for comparison of its signal to signal level of reference power supply, which output controls anode current of light source. EFFECT: increased validity of checking. 1 dwg

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RU 2 107 325 C1

Authors

Bespalov M.I.

Dates

1998-03-20—Published

1994-06-17—Filed