Geometrical instruments – Straight-line light ray type – Level
Patent
1998-04-17
2000-04-04
Fulton, Christopher W.
Geometrical instruments
Straight-line light ray type
Level
33290, G01B 1126, G01C 1508
Patent
active
06044567&
ABSTRACT:
A geodetic device is described, especially on a theodolite or a tachymeter which is provided with an arrangement for adjustment over a ground point or base point. It comprises a leveling base in which a bushing provided with a continuous center bore hole can be fastened and an upper part or alidade with a telescope which is pivotable about a horizontal tilting axis. Further, a first apparatus is provided for leveling the device in a horizontal plane and for displaying this plane, and a second apparatus is provided which comprise an objective imaging the ground point on a sensor arrangement. The arrangement for adjustment over a ground point is arranged between the leveling base and the upper part and is fixedly connected with the leveling base. It comprises a vertical spindle bushing with a hollow vertical spindle which is mounted therein and carries the upper part. This vertical spindle bushing is adjustable together with the vertical spindle in the coordinates of the horizontal plane relative to the leveling base.
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patent: 5212889 (1993-05-01), Lysen
patent: 5711080 (1998-01-01), Yamada
patent: 5839199 (1998-11-01), Ogawa
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Carl Zeiss Jena GmbH
Fulton Christopher W.
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