Resetting mechanism for electronic theodolite

Details Resetting mechanism for electronic theodolite Resetting mechanism for electronic theodolite

1993-12-06

1996-04-30

Nguyen, Thong Q.

Optical: systems and elements

Lens

With variable magnification

359399, 359406, 359702, G02B 1514, G02B 2308

Patent

active

055130445

ABSTRACT:
A resetting mechanism for an electronic theodolite of the present invention is comprised of a horizontal shaft for vertically turning a telescope, a first cam provided at one end of the horizontal shaft, and a lock lever limited by the first cam. A second cam is locked or released by the lock lever, and operates a lock member. A lock concave provided on the telescope is locked by the lock member when the telescope is turned to a fully down, locked position. Also an encoder is set to a zero position when the telescope is turned to a fully down, locked position.

REFERENCES:
patent: 3782808 (1974-01-01), Hohl et al.

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