Magnet assembly for measurement of displacement

Details Magnet assembly for measurement of displacement Magnet assembly for measurement of displacement

1988-04-04

1989-07-25

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

324262, G01B 714

Patent

active

048517720

ABSTRACT:
A magnet assembly for measurement of displacement of a rod is formed as a ring encircling the rod. The rod is displaceable along its axis and perpendicular to a plane of the ring. The rod includes a collar for interaction with a magnetic field produced by the magnet assembly. The assembly includes a magnetic field sensor and a first permanent magnet disposed along an inner surface of the ring, which are diametrically opposed on opposite sides of the rod. Second and third permanent magnets of like polarity are also disposed along the inner surface of the ring, and symmetrically positioned relative to the first magnet.

REFERENCES:
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patent: 3777273 (1973-12-01), Baba et al.
patent: 4086533 (1978-04-01), Ricouard et al.
patent: 4204158 (1980-05-01), Ricouard et al.
patent: 4338823 (1982-07-01), Iwasaki
patent: 4592249 (1986-06-01), Lehmann et al.
patent: 4639665 (1987-01-01), Gary
patent: 4665362 (1987-05-01), Abel et al.

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