Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1980-01-29
1982-04-20
Ruehl, Charles A.
Measuring and testing
With fluid pressure
Dimension, shape, or size
G01B 1306
Patent
active
043252494
ABSTRACT:
A self-stabilizing position sensor for pneumatic measurement. A nozzle, mounted on one end of a tube, blows compressed air directly against a surface to be sensed. The tube has on its other end an outlet member with restricting openings beyond which is a throttle plate, and a member for controlling a known, essentially frictionless position sensor. The midsection of the tube extends through a compressed-air chamber and through the chamber end walls where the tube is born on air cushions. The portion of the tube inside said chamber has inlet holes for compressed air flowing towards and through the nozzle or reversely towards and through said openings. By virtue of a gap, the throttle plate constitutes a non-sealing cover for a second chamber where the openings open. The sum of the pressure acting on the throttle plate, within the tube and on the free outer surface of the nozzle is balanced by the weight of the movable means consisting of nozzle, tube, outlet member, throttle plate and controlling member, and by elastic or magnetic forces acting on the movable member.
REFERENCES:
patent: 3194055 (1965-07-01), Knobel
patent: 3321838 (1967-05-01), Albertson, Jr.
patent: 3495442 (1970-02-01), Rejsa
patent: 3884076 (1975-05-01), Studer
patent: 4031741 (1977-06-01), Schaming
patent: 4070902 (1978-01-01), Knobel
Roskos Joseph W.
Ruehl Charles A.
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