Drive device for aligning a theodolite

Details Drive device for aligning a theodolite Drive device for aligning a theodolite

1997-04-18

1999-11-23

Fulton, Christopher W.

Geometrical instruments

Straight-line light ray type

Level

33281, 33285, 33 1PT, G01C 102, G01C 1500

Patent

active

059877634

ABSTRACT:
A drive device for aligning a theodolite with a target, in which the theodolite is mounted rotatably in the horizontal direction on a theodolite foot. Provision is made of a control knob and an encoder connected thereto, the encoder emitting control signals in accordance with the rotary movement at the control knob to a downstream control circuit. The circuit drives a positioning motor. The rotary table is arranged at the theodolite foot and carries the control knob. Provided between the theodolite and the rotary table is an electric contact which ensures the electrical connection between the encoder and the positioning motor.

REFERENCES:
patent: 4644659 (1987-02-01), Takahama
patent: 4752126 (1988-06-01), Fujii
patent: 5052119 (1991-10-01), Eventoff
patent: 5475930 (1995-12-01), Kimura
patent: 5533268 (1996-07-01), Keightley
patent: 5621975 (1997-04-01), Rando
patent: 5689892 (1997-11-01), Beckingham
patent: 5711080 (1998-01-01), Yamada
patent: 5742387 (1998-04-01), Ammann
Leica AG, "Vermessungisntrumente," 1993 (No month).

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