HIGH TEMPERATURE SENSING APPARATUS EFFECTIVE OVER

专利名称：HIGH TEMPERATURE SENSING APPARATUS

EFFECTIVE OVER EXTENSIVE LENGTHS

发明人：LEVINN R,US申请号：US3731247D申请日：19710108公开号：US3731247A公开日：19730501

摘要：In order to sense the presence of excessively high temperatures at points alongan extended length, an elongated element is extended along that length in heat-transferrelationship to the area where temperature is to be sensed, that element being formedof a material having a \"memory\" which is actuated when the material is subjected to thepredetermined excessive temperature, that \"memory\" causing the material then tochange its shape and therefore alter the effective length of the element. Work means isoperatively connected to that element, the work means performing a function

appropriate to the sensing of the excessive temperature. That function may, for example,be the opening of a circuit to a heater, the sounding of an alarm, or the actuation of fireextinguishing apparatus. Because of the characteristics of the material of which theelongated element is formed, it is essentially inactive over a range of temperaturesbelow the predetermined excessive temperature, and becomes operatively active onlywhen that predetermined excessive temperature is reached. The arrangement in questionis particularly well adapted for use in conjunction with elongated baseboard heaters theheating action of which is normally controlled by a room thermostat located remotelyfrom the heater. The apparatus of the present invention will determine whether sections

of the heater become heated to excessive temperatures even though the room beingheated may not be at an excessive temperature.

申请人：AMERICAN THERMOSTAT CORP,US

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