Geometrical instruments – Indicator of direction of force traversing natural media – Process
Patent
1983-05-24
1985-07-30
Martin, Jr., William D.
Geometrical instruments
Indicator of direction of force traversing natural media
Process
33319, 33356, 33363R, 73178R, G01C 1702
Patent
active
045312982
ABSTRACT:
A system to control the effect of northerly turning error which may occur in any direction indicating navigation instrument which includes a component responsive to the earth's magnetic field. In one form, an aircraft magnetic compass is compensated by electric current in an electromagnet which is made responsive to the rate of turn as sensed by a turn and bank indicator. In another form, an aircraft type slaved gyro directional system is protected from the effect of northerly turning error which occurs in its remotely located magnetic azimuth sensor by disconnecting its control circuit from the gyro when the turn rate reaches a predetermined level, thus allowing the gyro to act solely as a directional gyro during the turn. In still another form, the remotely located magnetic azimuth transmitter of a slaved gyro directional system is compensated against northerly turning error occurring in it by electric current in an electromagnet which is made responsive to the rate of turn as sensed by a turn and bank indicator. In some of the forms, the electric current in the electromagnet is made proportional to the rate of turn.
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Martin, Jr. William D.
Sanborn Robert S.
Sanborn Robert S.
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