Payphone electronic coin validator
First Claim
1. 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.
1 Assignment
0 Petitions
Accused Products
Abstract
An electronic coin validator for connection to a payphone chassis is described. The validator includes a coin passageway having at least one coin sensor, power circuitry for connection to payphone chassis power lines and connected to the coin sensor, a validator line balance circuit connected to the power circuitry, at least one coin signal line for connection to the payphone chassis, at least one coin value buffer, and a control means. The control means processes signals from the sensor to validate coins, adjusts the count in the coin value buffer when a coin is validated, and readjusts the count when corresponding coin credit signals are generated for transmission. The validator line balance circuit has an output for connection to the payphone chassis, and equalizes the loading on the telephone lines to minimize impedance fluctuations. Consequently, coins may be validated and accepted by the electronic coin validator as coin tones are being generated and transmitted by circuitry of the payphone chassis to a central office.
43 Citations
15 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4)
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5. A method for validating coins in a payphone, comprising:
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connecting an electronic coin validator including a validator line balance circuit and a bypass circuit to a payphone chassis;
minimizing line impedance fluctuations due to electronic coin validator current consumption variations with the validator line balance circuit;
validating coins even if coin tones are being generated and transmitted;
buffering coin credits; and
releasing coin credit signals to the payphone chassis. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method in a payphone electronic coin validator for generating coin credit signals, comprising:
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initializing a plurality of coin value buffers when an off-hook condition occurs;
detecting item arrival;
discriminating the inserted item;
returning the inserted item if it is invalid;
adjusting a buffer to represent the coin value if the inserted item is valid;
introducing a delay before transmitting a credit signal to a payphone chassis;
transmitting the credit signal representative of coin value to the payphone chassis and readjusting the selected buffer; and
permitting adequate current to flow in the payphone chassis to minimize coin tone distortion during coin tone generation to permit simultaneous coin validator functions. - View Dependent Claims (13)
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14. An article comprising a computer-readable medium which stores computer executable instructions for operating a payphone electronic coin validator for generating coin credit signals, the instructions causing a computer to:
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initialize at least one coin value buffer when an off-hook condition occurs;
detect item arrival when an item is inserted;
discriminate the inserted item;
return the inserted item if it is invalid;
adjust a coin value buffer to represent the coin value if the inserted item is valid;
introduce a delay before transmitting a credit signal to a payphone chassis;
transmit the credit signal representative of coin value to the payphone chassis and readjust the coin value buffer; and
permit adequate current to flow in the payphone chassis to minimize coin tone distortion during coin tone generation to enable the coin validator to simultaneously validate coins. - View Dependent Claims (15)
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Specification