Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Patent
1974-08-21
1976-03-09
Martin, Jr., William D.
Geometrical instruments
Indicator of direction of force traversing natural media
Magnetic field responsive
324 43R, G01C 1718
Patent
active
039422585
ABSTRACT:
A thin film compass apparatus utilizing a plurality of thin film magnetometers arranged in an orthogornal coordinate system to provide an earth reference compass having total tilt immunity.
REFERENCES:
patent: 2847642 (1958-08-01), Smith
patent: 3727177 (1973-04-01), Fuller et al.
Herbert James
Stucki Frank F.
Martin, Jr. William D.
Rusz Joseph E.
Stepanishen William
The United States of America as represented by the Secretary of
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