Telephone privacy controller

Details Telephone privacy controller Telephone privacy controller

1980-10-27

1982-06-01

Brigance, Gerald L.

179 38, H04M 170

Patent

active

043329837

ABSTRACT:
A telephone privacy controller for connection in series with a telephone set having steering diodes that direct current through a silicon controlled rectifier which is activated to conduct current by a zener diode connected between the current input and the gate input of the silicon controlled rectifier. The telephone privacy controller may be adapted to include a privacy release feature by addition of a capacitor and resistor connected to the gate input of the silicon controlled rectifier wherein the discharge from said capacitor may provide an input to the gate of the silicon controlled rectifier.

REFERENCES:
patent: 3499121 (1970-03-01), McIntosh et al.
patent: 4039759 (1977-08-01), Taylor

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