Edwin Gregory Myers

US Patent:

61921289, Feb 20, 2001

Filed:

Feb 28, 1966

Appl. No.:

4/532529

Inventors:

Edwin C. Myers - Washington DC
Theodore J. Rauen - Washington DC

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H04K 100

US Classification:

380257

Abstract:

The circuit uses a current sensing device that is controlled by the telephone line current. The telephone lines are connected to the contacts of a push-button switch, and a diode bridge is connected across contacts of the switch. Further, the circuit has a DC slow-release relay that is located across the output of the diode bridge. The telephone lines are also connected to the relay contacts of the DC slow release relay. A capacitor is placed across the telephone lines, and another capacitor is placed between the diode bridge and one of the relay contacts of the DC slow-release relay. The two capacitors act to shunt any radio frequencies that occur in the circuit as a result of an attempt to obtain information by RF saturation techniques.