Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1975-02-19
1976-01-27
Aegerter, Richard E.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
73290R, 33377, G01C 922
Patent
active
RE0286940
ABSTRACT:
Disclosed herein is a fluidic clinometer for automatically operating servomechanisms according to the angular displacements of a structure on which the inclinometer is fixedly mounted for integral movement therewith. It includes a substantially U-shaped tube having enlarged chambers of equal size at the free ends of its vertical legs which are open to the atmosphere, the walls of said chambers being formed of micropous material of a porosity to permit the passage of air, or similar gaseous fluid, but inhibit the escape of mercury, or other analogous liquid, therethrough; mercury, or other such liquid, partially filling the tube, up to about the middle of said chambers when the tube is in normal upright position; a substantially U-shaped casing concentrically surrounding said tube in airtight relation and providing an annular air space there-between; an air inlet medially of the horizontal or connecting part of said casing and an air outlet in each of the vertical legs of the casing; fluidic amplifying means having fluid communication with said outlets; fluid lines leading from the output side of the amplifying means for operating servomechanisms; and other fluid lines leading from the amplifying means to a differential pressure gauge indicating the angle and direction of inclination of said tube and casing, and hence of a structure on which the latter are to be mounted, in relation to a horizontal plane of reference. While this apparatus is capable of a variety of application, it is especially adapted for use in U.S. Pat. No. 3,689,953, Sept. 12, 1972, to the present co-inventor Costas E. Markakis, to control the amount and direction of the air needed to maintain the floating structures therein in stable or upright position.
REFERENCES:
patent: 1012993 (1911-12-01), Dissett
patent: 2557021 (1951-06-01), Williams
Markakis Costas E.
Vamvakoussis George N.
Aegerter Richard E.
Dracopoulos Peter T.
Phillips Charles E.
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