Anti-fraud device for use with a coin operated telephone instrument
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United States of America Patent
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-
Aug 29, 1989
Grant Date -
N/A
app pub date -
Nov 22, 1988
filing date -
Nov 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An anti-fraud device is mounted internally within a coin-operated telephone to prevent fraudulent calling due to 'pin fraud'. The device includes circuitry which senses the presence of ground fraud conditions to disconnect the transmitting element from the telephone to prevent the defeat of a coin collect supervisory signal to cause coins temporarily held in the coin hopper to drop into the coin collection box rather than to be returned to the user.
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Family
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Cited Art Landscape
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