Apparatus for measuring metacentric height of a ship

Measuring and testing – Center of gravity; turning moment; metacentric height

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B63B 908

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039824241

ABSTRACT:
Apparatus for measuring the metacentric height of a vessel by the use of an electrical signal generator which may be an armature stabilized relative to earth by a pendulus precision gyro and a stator fixed to the vessel to provide alternately polarized signals as the vessel rolls in response to even small roll inducing forces, such as wind, harbor waves, etc. A charge is allowed to build up on a capacitor in response to a first polarized signal as the vessel rolls in one direction and be discharged from the capacitor in response to a second polarized signal as the vessel rolls in the opposite direction to produce a signal representative of total roll period which signal actuates an indicator calibrated in terms of metacentric height.

REFERENCES:
patent: 1859546 (1932-05-01), Wilson
patent: 2431405 (1947-11-01), Kreitner et al.

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