WARNING DEVICE Russian patent published in 1995 - IPC

FIELD: radio engineering. SUBSTANCE: warning device has in compliance with first version audio signals generator 1, power supply source 2, unit 3 closing circuit when locking chain is tightened, switch 4 changing operation mode of device, break magnetically-controlled contact 5 and magnet 6 which are arranged accordingly on end of guarded door and on door casing in opposition to each other. In agreement with second version device includes audio signal generator, power supply source and switching on unit integrating make magnetically controlled contact 8, resistor 9 and magnet 6 arranged in way similar to first version. EFFECT: expanded functional capabilities of device. 3 cl, 4 dwg