FIRE WARNING DEVICE ON TRANSPORTATION FACILITY Russian patent published in 1994 - IPC

FIELD: fire warning devices. SUBSTANCE: device has first and second relays 1 and 2, sensors 3 connected with relays 1 and 2, fire warning device which is series-connected contacts 1-1 and 2-1 to power source. Second relay 2 is cut in circuit of thermal sensor 3 and relays 1 and 2 are arranged on transportation facility so that movable make contacts of both relays 1 and 2 are parallel and their ends are directed to opposite sides. EFFECT: higher stability of device to mechanical overloads. 2 dwg