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Expired
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GB106219A
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Individual
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Individual
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Priority to GB106219ApriorityCriticalpatent/GB138671A/en
Publication of GB138671ApublicationCriticalpatent/GB138671A/en
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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Engineering & Computer Science
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Radar, Positioning & Navigation
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Remote Sensing
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Physics & Mathematics
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General Physics & Mathematics
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Water Treatment By Electricity Or Magnetism
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Abstract
138,671. Whyte, W. D. Jan. 15, 1919. Compasses, magnetic.-Mariners' compasses of the liquid type have a flange a which is hollowed out to form a circumferential groove b and stepped to form a bezel ring e, the surfaces c', c<2> of the bezel ring and groove respectively being inclined so that air bubbles within the bowl move into the groove. As shown, the bowl has a glass bottom and a screw plug f which, as described in Specification 138,672, allows the bowl to be filled from below.
GB106219A1919-01-151919-01-15Improvements in the mariner's compass
ExpiredGB138671A
(en)