Arrangement in a magnetic position indicator

Details Arrangement in a magnetic position indicator Arrangement in a magnetic position indicator

1986-02-28

1987-12-15

Levy, Stewart J.

Measuring and testing

Simulating operating condition

Marine

335207, 116 20, 116204, G01M 1900, G01D 512

Patent

active

047124202

ABSTRACT:
Apparatus for sensing the relative position between a fixed first machine component and an axially displaceable and pivotably mounted second machine component includes first and second bar-shaped magnets disposed at mutually right angles and rigidly connected to the second machine component, each of the magnets having a free pole; and a plurality of transducers rigidly connected to the first machine component and facing the free poles of the magnets for sensing the magnetic field of said magnets. At each long side of each of the first and second magnets an adjacent magnet disposed in parallel with the respective first or second magnet, each of these adjacent magnets having a free pole disposed in the vicinity of the free pole of the respective first or second magnet. The free poles of the first and the second magnets have a polarity reverse to that of the free poles of the adjacent magnets, and each magnet has opposite to its free pole a second pole directed away from the transducers. At least the second poles of the mutually parallel magnets are magnetically connected. The location and the orientation of the magnets causes the extension of the magnetic field at the free poles of the first and second magnets to be restricted.

REFERENCES:
patent: 3133173 (1964-05-01), Vreins
patent: 4066962 (1978-01-01), Jaffe
patent: 4262251 (1981-04-01), Fujishiro et al.
patent: 4519266 (1985-05-01), Reinecke
patent: 4543843 (1985-10-01), Reynolds et al.
patent: 4543844 (1985-10-01), Inui et al.
patent: 4554422 (1985-11-01), Embrey et al.
patent: 4590817 (1986-05-01), Bennett

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