Telephone pay station with fraudulent chain-dialing...

Details Telephone pay station with fraudulent chain-dialing... Telephone pay station with fraudulent chain-dialing...

H - Electricity

04

M

379/36, 379/74

H04M 17/00 (2006.01)

Patent

CA 1056971

ABSTRACT OF THE DISCLOSURE An electrical circuit for preventing fraudulent chain-dialing and adapted for use with a telephone pay station. The circuit comprises a pair of input terminals adapted to be connected across a telephone number selector. A latch is also provided having first, second and third electrodes, the first and second electrodes being connected to the input terminals. A timing circuit is connected to the third electrode. This timing circuit enables the latch to come on when signal on the input terminal is present for a predetermined time thereby shorting the number selector.

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