Shape memory alloy thaw sensors

Details Shape memory alloy thaw sensors Shape memory alloy thaw sensors

1995-12-05

1998-04-07

Bennett, G. Bradley

Thermal measuring and testing

Temperature measurement

Mechanical

374106, 116216, 426 88, G01K 548

Patent

active

057356076

ABSTRACT:
A sensor permanently indicates that it has been exposed to temperatures exceeding a critical temperature for a predetermined time period. An element of the sensor made from shape memory alloy changes shape when exposed, even temporarily, to temperatures above the Austenitic temperature of the shape memory alloy. The shape change of the SMA element causes the sensor to change between two readily distinguishable states.

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patent: 5076197 (1991-12-01), Darringer et al.
patent: 5335994 (1994-08-01), Weynant Nee Girones

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