Position transducer

Details Position transducer Position transducer

1980-07-07

1982-06-01

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

Plural switches

335280, H01H 3600

Patent

active

043330665

ABSTRACT:
An electrical transducer for indicating the position of an element movable n a predictable path, such as angular rotation, has no electrical parts on the movable element. A magnet mounted to the movable element traces a fixed path which lies adjacent to a stationary tubular enclosure containing liquid suspending a mass of ferromagnetic, electrically conductive material, the magnet drawing the mass of particles along within the tube on movement in its fixed path. Electrodes spaced on opposite sides of the tube wall along the length of the tube are electrically coupled by the mass of particles, whereby to indicate the position of the movable element.

REFERENCES:
patent: 2668884 (1954-02-01), Jacobs
patent: 2917599 (1959-12-01), Ovshinsky
patent: 2966567 (1960-12-01), Ovshinsky
patent: 3200216 (1965-08-01), Deutschman
patent: 3488578 (1970-01-01), Stigmark
patent: 4100485 (1978-05-01), Rogers
patent: 4165501 (1979-08-01), Bongort

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