Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Patent
1979-09-06
1982-01-12
Martin, Jr., William D.
Geometrical instruments
Indicator of direction of force traversing natural media
Magnetic field responsive
33333, 33347, 116284, 224273, 224312, G01C 1704
Patent
active
043098282
ABSTRACT:
A device for attaching a compass assembly to a vehicle body comprising a support rod provided with a ball member on its end, said rod being disposed vertically on the upper surface of the housing of said magnetic needle assembly.
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