Building surveillance apparatus

Details Building surveillance apparatus Building surveillance apparatus

G - Physics

08

B

340/102, 340/124

G08B 19/00 (2006.01) G08B 25/08 (2006.01) H04M 11/04 (2006.01)

Patent

CA 1207403

- 1 - Abstract A surveillance apparatus for the detection and prevention of damages due to fires, gas, robbery and other destructive conditions of a building which has a large number of rooms each furnished with a telephone set and a door provided with a lock. The telephone cables extending between respective rooms and a main terminal board of the building are utilized as wires for transmitting detection signals of detectors provided in respective rooms to indicators provided in a central surveillance room during the locking of the door.

461677

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