Temperature sensitive controlling device

摘要

A temperature sensitive controlling device comprises a casing inside which powders of at least two shape memory alloys are disposed with a shaft movably received therein. The mix of different shape memory alloy powder provides a characteristic curve more desired than its component shape memory alloys and by adjusting the ratio between the component powders, the curve can be adjusted as one expects so that when the powders are subject to temperature variation, the shaft is moved as desired. A method for manufacturing such a temperature sensitive controlling device is also provided. The method comprises the steps of melting material metals of a given ratio together to form a shape memory alloy, atomizing the molten alloy by an inert gas flow to form a first kind of powder, providing at least a second kind of powder with the similar way, mixing these powders together in accordance with a specific ratio, disposing these powers in a casing and then sealing the casing and inserting therein a movable member to be moved by the powders when the powders are subject to temperature variations.