Encoder disc rotating device for a surveying instrument

Details Encoder disc rotating device for a surveying instrument Encoder disc rotating device for a surveying instrument

1996-01-31

1998-01-27

Fulton, Christopher W.

Geometrical instruments

Straight-line light ray type

Level

33290, G01C 100, G01C 1500, G01B 1126

Patent

active

057110808

ABSTRACT:
The encoder disc rotating device for a surveying instrument comprising a vessel-shaped cover member 30 rotating coaxially with a rotating axis 22 of an encoder disc rotating knob 21 and having an opening formed at the arcuate lateral side for protruding to expose the encoder disc rotating knob 21, in which the encoder disc rotating knob 21 is protruded to expose or concealed by the rotation of the cover member 30. The cover member can ensure a large space for arranging the operation system without changing the machine height and cover the encoder disc rotating knob for preventing erroneous operation without hindering the operation.

REFERENCES:
patent: 1224725 (1917-05-01), Erickson
patent: 1953804 (1934-04-01), Hayes
patent: 4136955 (1979-01-01), Aeschlimann et al.
patent: 4752126 (1988-06-01), Fujii

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