Measuring and testing – Volumetric content measuring
Patent
1978-09-06
1979-09-04
Gorenstein, Charles
Measuring and testing
Volumetric content measuring
73760, 73777, G01L 104, G01L 118
Patent
active
041663845
ABSTRACT:
A semiconductor transducer comprising an improved strain-yielding body yielding a strain in response to the impartation of a force or displacement, and a semiconductor strain gauge bonded to the strain-yielding body. The improved strain-yielding body is made of an iron-nickel-cobalt alloy containing 28.2 to 31.0% by weight of nickel and 15.0 to 19.5% by weight of cobalt. This iron-nickel-cobalt alloy is initially heated up to a temperature above 600.degree. C. for the purpose of standard heat treatment for removing its internal strain. After the standard heat treatment, the iron-nickel-cobalt alloy is subjected to cold working at a working rate of more than and including 60%, and is then subjected to heat treatment at a temperature between 350.degree. C. and 600.degree. C. The heat-treated iron-nickel-cobalt alloy is shaped into the predetermined form of the strain-yielding body.
REFERENCES:
patent: 3446064 (1969-05-01), Bowman
patent: 4019388 (1977-04-01), Hall et al.
Ai Mitsuo
Matsuda Yasumasa
Matsuoka Yoshitaka
Nagata Takeo
Nishihara Motohisa
Gorenstein Charles
Hitachi , Ltd.
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