AUTONOMOUS HEAT-SENSITIVE TRIGGER Russian patent published in 2004 - IPC

FIELD: fire fighting equipment, particularly triggers for fire-protection systems of fire and explosion hazardous factories, for railroad transport, for protection sea and river vessels, remote storehouses, storages for volatile flammable liquids and combustive-lubricating materials in case of supplied energy lack and without staff presence.

SUBSTANCE: heat-sensitive trigger includes heat-sensitive member 1 formed of shape memory material and installed on control rod 2. Arranged on shaft 3 is magnet 4 with pole collectors 5. Inductance coil 6 has core 7 with heads 8. Installed on shaft 3 is torsion spring 9 connected with body 10 in which limiter 11 of control rod rotation is located. Limiter 11 has flat spot 12. In this way shaft 3 is prevented from rotation. Trigger operates in the following manner. Initial heat-sensitive member shape is compression spring with determined spring coils pitch. In stand-by heat-sensitive member shape spring coils abut one another. As fire occurs heat-sensitive member 1 pulls control rod 2 out of body 10 and control rod disengages from shaft 3. Shaft 3 with magnet 4 and pole collectors 5 rotate relative heads 8 of inductance coil 6 core 7 under the action of preliminary wound up spring 9.

EFFECT: increased duration of electrical current generation.

2 dwg