FIRE HEAT DETECTOR Russian patent published in 1994 - IPC

FIELD: electric fire signalling devices. SUBSTANCE: detector is made in form of two sealed chambers 1, 2 with diaphragm 5 separating the chambers and center 6 made thicker in place of contact with switch 4 arranged in one of chambers 1 or 2. This chamber accommodates also heat collector radiator 3 with developed surface. Chamber 2 has thickened walls, and detector is placed in guard case 7. EFFECT: detection of fire at initial stage by obtaining temperature gradient, enhanced operating characteristics and reliability of operation. 4 dwg