Electromagnetic compass

Details Electromagnetic compass Electromagnetic compass

1977-04-04

1978-10-03

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Diverse directional indicator

33313, 33361, 33363K, G01C 1728

Patent

active

041176022

ABSTRACT:
A magnetic compass in which the compass magnet is an electromagnet energized only when in a horizontal disposition to provide a correct heading indication without error due to tilting of the compass magnet.

REFERENCES:
patent: 2054318 (1936-09-01), Gunn
patent: 3888016 (1975-06-01), Fowler

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