REMOTE ALARM DEVICE Russian patent published in 1995 - IPC

FIELD: remote alarm systems. SUBSTANCE: device has sensors 1, coder 2, first integrator 3, current amplifier 4, turn-on unit 5, radio-frequency generator 6, power amplifier 7, voltage doubler 8, second integrator 9, transmitting antenna 10, receiving antenna 11, superheteronyne detector 12, audio-frequency amplifier 13, pulse shaper 14, decoder 15, control unit 16, alarm signal generator 18, pulse shaper 20, first switch 21, counter 22, storage unit 23, first delay line 24, second delay line 26, decoder 25, second switch 27, initial setting unit 28, first flip-flop 29, second flip-flop 30, storage battery 32, power switch 33, balanced generator 34, delayed pulse shaper 35, flip-flop 36, electronic switch 37, voltage regulator 38, instrument bridge 39, OR gate 40. EFFECT: improved reliability due to digital coding of alarm signal, raised power at same supply voltage, use of receiver check and control unit. 3 cl, 7 dwg, 1 tbl