Phase displaced measurement of contiguous spherical balls

Details Phase displaced measurement of contiguous spherical balls Phase displaced measurement of contiguous spherical balls

1976-07-27

1978-07-25

Rolinec, Rudolph V.

Electricity: measuring and testing

Magnetic

Displacement

324208, G01R 3300

Patent

active

041032225

ABSTRACT:
A detector for measuring relative movement and/or displacement between two relatively movable members comprises a linear array of steel balls, or other suitable longitudinal element of which the magnetic permeability varies cylically in a longitudinal direction, mounted on one of the members, and a transducer on the other member. The transducer is arranged to produce a magnetic field through the balls, preferably across the line thereof, and includes at least two pick-up coils spaced along the line of balls for sensing the variation in the magnetic field due to the presence of the balls, so that the relative spacing of the pick-up coils and the balls enable, on production of the magnetic field, the generation by the pick-up coils of output signals denoting the relative movement between the two members.

REFERENCES:
patent: 2621514 (1952-12-01), Waugh
patent: 3147574 (1964-09-01), Pointe et al.
patent: 3883796 (1975-05-01), Holt

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