Communications: electrical – Selective – Having indication or alarm
Patent
1975-01-23
1977-12-06
Caldwell, Sr., John W.
Communications: electrical
Selective
Having indication or alarm
33363K, 33DIG3, 250231R, 364450, G08G 112
Patent
active
040619958
ABSTRACT:
An odograph in which calibrated portions of heading and distance signals are used for displaying locations. A magnetic compass is provided including a North-seeking spherical surface carrying a reflective segment, the position of which is sensed by electro-optical components which derive and generate an appropriate heading signal. An odometer generates distance signals which are integrated with the heading signals, calibrated by gating with a probabilistic function. A visual display is driven by means which are responsive to coincidence of the odometer and heading signals but which exclude response to coincidence of an odometor signal and two heading signals.
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Caldwell Sr. John W.
Groody James J.
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