Universal magnetostrictive force sensor

Measuring and testing – Dynamometers – Responsive to force

Reexamination Certificate

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Reexamination Certificate

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06993983

ABSTRACT:
A magnetostrictive force sensor universally usable in any environment with similar signals unaffected by the surrounding material. To this end, a sensor comprising a shaft of magnetostrictive material with an inductance coil wound around the shaft is provided with a magnetic shell enclosing the coil only or both the coil and the shaft. Upon application of the magnetic field, the resultant flow of magnetic flux is confined to a path through the shaft and the magnetic shell. By confining the magnetic flux path, the dependency of the sensor signal on the surrounding material and environment is essentially eliminated.

REFERENCES:
patent: 3084298 (1963-04-01), Frisina
patent: 3743988 (1973-07-01), Abel
patent: 4907462 (1990-03-01), Obama et al.
patent: 4989460 (1991-02-01), Mizuno et al.
patent: 5256920 (1993-10-01), Porzio
patent: 5400656 (1995-03-01), Schiessle et al.
patent: 5510660 (1996-04-01), Flatau et al.
patent: 5905210 (1999-05-01), O'Boyle et al.

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