Paystation theft inhibiting circuit

Details Paystation theft inhibiting circuit Paystation theft inhibiting circuit

1989-07-03

1990-05-01

Schreyer, Stafford D.

Telephonic communications

With check operated control

Fraud or interference prevention

379150, 379152, 194202, H04M 1702

Patent

active

049225251

ABSTRACT:
A telephone paystation theft inhibiting circuit for detecting the grounding of the handset circuit conductors. Protection is provided for the receiver circuit conductor by means of an isolation transformer and solid state switching devices are employed to disconnect the transmitter from its associated circuit conductors when the grounding condition occurs.

REFERENCES:
patent: 2765366 (1956-10-01), Holden

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