Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
G01C3/00—Measuring distances in line of sight; Optical rangefinders
G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument
G—PHYSICS
G01—MEASURING; TESTING
G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
G01B3/00—Measuring instruments characterised by the use of mechanical techniques
G01B3/56—Gauges for measuring angles or tapers, e.g. conical calipers
Verfahren zur Bestimmung des Kurses und der Geschwindigkeit von Luftfahrzeugen ueber Grund und der Geschwindigkeit und Richtung des Winds vom fliegenden Luftfahrzeug aus
Einrichtung zur Fernanzeige, Messung oder Registrierung von Stellungen beliebiger Teile (Zeiger, Schwimmer o. dgl.) mittels einer periodisch wirkenden Hilfskraft