(under subclass 306) Subject matter wherein the temperature responsive actuating means is specifically recited as including a Bourdon tube device. The Bourdon tube is a tubular structure, usually of stainless steel or other similar material with a large coefficient of expansion and bent upon itself in the shape of a sector of a torus and when subjected to heat of pressure tends to straighten out, thereby actuating a movable contact structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
114+, for similar subject matter in an electrothermally actuated switch.
SEE OR SEARCH CLASS
73, Measuring and Testing,
732+, for Bourdon tube type fluid pressure gauges. 200, Electricity: Circuit Makers and Breakers,
81.6, for Bourdon tube type pressure actuated switches.
236, Automatic Temperature and Humidity Regulation,
30, and 57 for automatic temperature regulating devices utilizing Bourdon tubes.
374, Thermal Measuring and Testing,
203, for a thermometer having a fluid filled Bourdon tube.
