Hand device for determining vehicle position

Details Hand device for determining vehicle position Hand device for determining vehicle position

1983-05-03

1985-12-03

Frankfort, Charles

Geometrical instruments

Scriber

Curved line

33150, B43L 922

Patent

active

045558523

ABSTRACT:
A hand-held device for the determination of the momentary position of a vehicle, especially an airplane, moving at least approximately in a straight line and at about constant speed, has two compass legs each having a compass point and a lock movement having a drive shaft for driving at least one of the compass legs which is pivotable about a pivot pin. In order to largely eliminate the chord defect, the pivot pin of the drivable leg of the compass is movable in a straight line in a guide slot as a function of speed and the drive shaft moves the drivable leg as a function of time.

REFERENCES:
patent: 283907 (1883-08-01), Low
patent: 598911 (1898-02-01), De Tray
patent: 1396417 (1921-11-01), Gepack
patent: 1901801 (1933-03-01), Cattaneo
patent: 2645021 (1953-07-01), Dierkes
patent: 3014281 (1961-12-01), Caporicci
patent: 4163322 (1979-08-01), Partes

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