Signals and indicators – Indicators – Temperature responsive or compensating means
Patent
1983-09-19
1985-06-11
Frankfort, Charles
Signals and indicators
Indicators
Temperature responsive or compensating means
116221, 374205, G01K 102
Patent
active
045221472
ABSTRACT:
A shutter 4 is movably mounted in a housing 6 for actuation between given positions by an SME (shape memory effect) element 8 in response to a given level of current flow through the SME element 8 causing I.sup.2 R heating of the latter above its transition temperature. The shutter 4 may be an indicator flag exposed by a window 10 in the housing 6, or may interrupt an optic beam 22.
REFERENCES:
patent: 1501173 (1924-07-01), Moore
patent: 1695827 (1928-12-01), Sipe
patent: 3483752 (1969-12-01), Rogen et al.
patent: 3594675 (1971-07-01), Wilson
patent: 3613732 (1971-10-01), Wilson et al.
patent: 4141247 (1979-02-01), Schlick
patent: 4169381 (1979-10-01), Skopil
Hyink Roy
Kroll John W.
Eaton Corporation
Frankfort Charles
Will Thomas B.
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