Optics: measuring and testing – Angle measuring or angular axial alignment – Apex of angle at observing or detecting station
Patent
1981-10-30
1984-04-10
Punter, William H.
Optics: measuring and testing
Angle measuring or angular axial alignment
Apex of angle at observing or detecting station
33228, 356138, G01C 102, G01B 1126
Patent
active
044418124
ABSTRACT:
A method and an arrangement for automatic alignment of a geodetic angle measuring device, especially an electronic tachymeter for topographical survey, in the marking and measuring of points. The object of the invention consists in a rapid and precise, yet constructively and technologically simple solution. The novel feature is the utilization of a reference parameter, which at the device position and the target point is the same. Such reference parameters are the north direction and vertical direction, which are fixed at the target point and the device position by a circular or magnetic compass and pendulum or plumb line. In reference to such north direction and/or vertical direction, there is measured the target direction of a reflector at the target point and are formed the complementary angles by which the tachymeter has to be adjusted so that it can aim at the reflector.
REFERENCES:
patent: 2933730 (1960-04-01), Main
patent: 4136955 (1979-01-01), Aeschlimann et al.
patent: 4302885 (1981-12-01), Levine et al.
patent: 4355902 (1982-10-01), Feist
Jenoptik Jena GmbH
Punter William H.
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