Position detector for the movable element of a fluid-operated ac

Details Position detector for the movable element of a fluid-operated ac Position detector for the movable element of a fluid-operated ac

1988-06-17

1989-10-24

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

73745, 200 82R, G08B 2100, G01L 900, H01H 3538

Patent

active

048765317

ABSTRACT:
A device for detecting the position of a movable element of an adjusting member operated by fluid pressure. A cylindrical probe is introduced into the wall of the actuator and extends to near the inner surface of wall. The probe is mounted to be axially displaceable at the holder so that it may be adapted to different wall thicknesses. The holder contains a sealing means for sealing the passage of the cylindrical probe, which is extended by the shaft and is adapted to be rotatable in a thread bore at the rear end of the holder. A circuit box accommodating the electric circuitry is secured to the end of shaft. The position detector, which detects when the piston has approached the probe, may be simply adapted to different cylinder wall thicknesses. This eliminates the requirement of using different types of position detectors whose probes vary by the length of their projection.

REFERENCES:
patent: 4680436 (1987-07-01), Brausfeld et al.
patent: 4689553 (1987-08-01), Haddox
patent: 4705151 (1987-11-01), Leigh-Monstevens et al.
patent: 4752657 (1988-06-01), Kane et al.
patent: 4755637 (1988-07-01), Turck
patent: 4799048 (1989-01-01), Goshima et al.

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