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William David Whyte
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G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
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Abstract
6112. Whyte, W D March 12. Mariners' compasses.-A liquid compass is provided with a lubbers' line k<2> which is curved to correspond with the path of the edge of the card c during its oscillations, and formed with an horizontal part k<1>. The expansion chamber i is made arcuate or crescent-shaped.
GB191306112D1913-03-121913-03-12Improvements in Liquid Compasses.
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