Measuring and testing – Navigation – Take-off and landing monitors
Patent
1977-02-16
1979-01-02
Woodiel, Donald O.
Measuring and testing
Navigation
Take-off and landing monitors
G01C 2100
Patent
active
041321138
ABSTRACT:
A navigational device consisting of a magnetic compass containing a pattern having a specified relation of black-to-white density with respect to angle, rotating with the compass card, a light source for illumination of the pattern, pairs of sensors mounted in the compass and responsive to the light intensity reflected from or transmitted through the pattern, the output from one pair of sensors being proportional to the sine of the angle made by the sensor pair zero reference line with respect to Magnetic North, and the output of the other pair of sensors being proportional to the cosine of said angle, both outputs being suitable for operation of a remote indicating compass, and various modifications thereof for making the outputs of the sensor pairs proportional to the sine and cosine of the angle between a manually settable desired heading or angle and the angle of the said sensor pair zero reference line with respect to Magnetic North. Several additional features such as off-course alarm, drift vector insertion, and compensating means for craft pitch and roll are described and claimed.
REFERENCES:
patent: 3875405 (1975-04-01), Ferguson
patent: 4023018 (1977-05-01), Hall
QuesTech Inc.
Woodiel Donald O.
LandOfFree
Navigation devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Navigation devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Navigation devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1512120