Registers – Transfer mechanism – Traveling pawl
Patent
1975-01-24
1976-06-01
Gruber, Felix D.
Registers
Transfer mechanism
Traveling pawl
2351502, 340 24, G06F 1550
Patent
active
039611663
ABSTRACT:
A timing circuit receives substantially square wave clock signals and generates sine and cos driving signals therefrom at a predetermined frequency for application to first and second mutually perpendicular Hall effect generators. The output signals from the Hall effect generators are algebraically summed to provide a heading signal, the phase displacement of which with respect to the driving signals, is representaive of the orientation angle between one of the Hall effect generators and magnetic north. A counter is synchronized to begin to count clock pulses at the beginning of each period of the driving signals. A logic circuit is effective to disable the counter when the Count signal therein is representative of the orientation angle. The sine and cos of the Count signal are derived and each is multiplied by a distance signal related to the number of revolutions of a wheel of the vehicle being monitored. The resulting coordinate signals are stored in X and Y registers which are automatically updated when the vehicle approaches transmitters at predetermined locations.
REFERENCES:
patent: 3749893 (1973-07-01), Hileman
patent: 3849636 (1974-11-01), Helms
patent: 3882501 (1975-05-01), Botzum
E-Systems Inc.
Gruber Felix D.
Wilder Robert V.
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