Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1978-01-17
1979-10-09
Stallard, W.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
73722, 73753, 148 12R, 148122, H04R 1500, H01L 4120, H01L 4122
Patent
active
041704983
ABSTRACT:
A magnetostrictive pressure transducer is disclosed wherein pressure in the range of zero to 1000 psi can be accurately measured. The pressure transducer apparatus includes a diaphragm causing the pressure to be applied unidirectionally on sensor material having the property of undergoing changes in magnetic induction when a pressure is applied thereto, the change in magnetic induction being related to the applied pressure. The change in magnetic induction is measured and thus provides a measurement of the applied pressure. Several embodiments are also disclosed for measuring vacuum. In these embodiments force is also applied unidirectionally on the sensor material.
REFERENCES:
patent: 1586883 (1926-06-01), Elmen
patent: 1673790 (1928-06-01), Bandur
patent: 1739752 (1929-12-01), Elmen
patent: 2376156 (1945-05-01), Kuehni
patent: 2414457 (1947-01-01), Eldredge et al.
patent: 3162795 (1964-12-01), Cherniak
patent: 3183126 (1965-05-01), Curtis et al.
Jost Ernest M.
Reenstra Arthur L.
Trenkler George
Haug John A.
McAndrews James P.
Stallard W.
Texas Instruments Incorporated
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