Vertical movement detection systems

Details Vertical movement detection systems Vertical movement detection systems

1974-05-22

1976-04-13

Bell, Jr., Houston S.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

73401, G01C 504

Patent

active

039494845

ABSTRACT:
A multi-limbed manometer system adapted to detect and record the vertical displacement of different parts of a large structure, e.g., the pedestals and cylinders of a steam turbine installation. The datum level of the liquid in the system is adjusted by changing the pressure of a head of liquid connected to the system, for example, by raising and lowering a reservoir of the system or by moving a piston in a cylinder connected to the system. The floats comprise homogeneous structures having a multiplicity of small air-filled compartments, e.g. an epoxy resin containing air-filled hollow glass balls having a diameter of about 150 microns. A float in a reference limb provides a reference signal indicative of the actual liquid level which is compared with a signal indicative of the desired liquid level and a difference signal derived and used to raise and lower the reservoir or move the piston in the cylinder.

REFERENCES:
patent: 2438758 (1948-03-01), Leach
patent: 2532883 (1950-12-01), Bennett et al.
patent: 3048927 (1962-08-01), Maloof
patent: 3645135 (1972-02-01), Hadley

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