Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Patent
1977-03-23
1979-02-20
Martin, Jr., William D.
Geometrical instruments
Indicator of direction of force traversing natural media
Magnetic field responsive
33363K, G01C 1728
Patent
active
041399510
ABSTRACT:
Our invention relates to a novel electromechanical method and apparatus for detecting and representing the north direction and/or the heading of an object or vessel in analog and/or digital representation.
REFERENCES:
patent: 2036444 (1936-04-01), Tolson
patent: 2444290 (1948-06-01), Granqvist
patent: 2620570 (1952-12-01), Minas
patent: 2641060 (1953-06-01), Sweeton
patent: 3387377 (1968-06-01), Patton
patent: 3888016 (1975-06-01), Fowler
patent: 4013946 (1977-03-01), Lewis
Cunard Thomas L.
Cunard Ulrich O.
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