AUTOMATIC SHUT-OFF DEVICE OF TV SET Russian patent published in 1997 - IPC

FIELD: radio engineering; remote turn-off of TV sets. SUBSTANCE: device has band filter, amplitude detector, switching unit, first relay with coil and two-way contact, ON/OFF button, capacitor, diode, second relay with coil, make contact, and two-way contact, third relay with coil and break contact, first short-pulse shaper, first AND gate, first and second multivibrators, second AND gate, second short-pulse shaper, reset pulse shaper, counter-divider, third and fourth multivibrators. EFFECT: improved noise immunity, provision for normal operation of TV set in absence or low level of audio signal in transmission of television programs. 2 dwg