Patent ID: 6370242
Filing Date: 2002-04-09
Classification: H04M

Abstract:
An electronic coin validator for connection to a payphone chassis wherein the validator is capable of validating coins even as coin tones are generated and transmitted, comprising:a coin passageway including at least one coin sensor; power circuitry for connection to payphone chassis power lines and connected to the coin sensor; a bypass circuit connected to the power circuitry and having an output for regulating a payphone chassis line balance circuit; a validator line balance circuit connected to the power circuitry and having an output for connection to the payphone chassis, for equalizing the loading on the telephone lines to minimize impedance fluctuations; at least one coin signal line for connection to the payphone chassis; at least one coin value buffer; and a control means connected to the coin sensor, to the power circuitry, to the coin signal line and to the coin value buffer, the control means processing signals from the sensor to validate coins, adjusting a count in the coin value buffer when a coin is validated, and readjusting the count when corresponding coin credit signals are generated for transmission on the coin line.