Optical ruler structure

Details Optical ruler structure Optical ruler structure

1998-01-13

2000-05-23

Fulton, Christopher W.

Geometrical instruments

Distance measuring

Scale reading position sensor

33705, G01B 1104

Patent

active

060652217

ABSTRACT:
This disclosure relates to an optical ruler structure. It includes a first guide seat and a second guide seat. A flexible stopper plate is disposed on outer side of the slide section of the second guide seat. The stopper plate is a thin sheet and formed with a central slot parallel to a long side. Each end of the slot is formed with a stopper section. The stopper plate is flexible and firm, so that the abrasion of the slide seat during sliding can be reduced and the dirts are prevented from getting into the first guide seat to damage the internal circuits.

REFERENCES:
patent: 4570347 (1986-02-01), Miller
patent: 4982508 (1991-01-01), Nelle et al.
patent: 5837981 (1998-11-01), Wang

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