Removable lamp housing for optical encoder

Details Removable lamp housing for optical encoder Removable lamp housing for optical encoder

1980-08-18

1982-03-23

Robinson, Thomas A.

Communications: electrical

Continuously variable indicating

Via radiant energy beam

250231SE, 324175, G01D 534, G01P 336, G08C 1936

Patent

active

043216005

ABSTRACT:
An optical encoder for providing an electrical signal having a frequency corresponding to the revolutions per minute of a motor shaft comprises a mounting member for securement to the motor, a shutter element for securement to the motor shaft and a top cover secured to the mounting member to sandwich the shutter therebetween. A photo cell is provided on the cover and a lamp housing providing a light source on the mounting member for shining light through the shutter to the photo cell. Rotation of the shutter then modulates the light beam to provide the desired signal. The lamp housing itself incorporates a built-in reflector with light bulb and is so designed as to be replaceable with respect to the mounting member so that heretofore provided lenses and the like are no longer necessary and the mounting arrangement is such that alignment accuracy with the photo cell is assured.

REFERENCES:
patent: 2962895 (1960-12-01), Rumble
patent: 3693023 (1972-09-01), Wasserman
patent: 4182953 (1980-01-01), Hurley et al.

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