Scale reading apparatus

Details Scale reading apparatus Scale reading apparatus

1976-09-22

1977-12-13

Rolinec, Rudolph V.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356169, 250231R, H01J 314

Patent

active

040630862

ABSTRACT:
A scale reading apparatus having a dust-proof means for protection of the slide and guide surfaces, the relatively moving parts of the apparatus, from the ingress of foreign material and a means for sensing the scale reading. The dust-proof means includes a flexible band covering the entire length of the slide surfaces and an opening connecting the moving parts. The scale sensing means is resiliently mounted at an angle to the verticle thereby substantially reducing the forces applied and the affects of vibration upon the scale sensing means to insure a high precision reading.

REFERENCES:
patent: 3816003 (1974-06-01), Litke
patent: 3899255 (1975-08-01), Meier

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