Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1980-09-08
1982-08-10
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
29271, G01D 534
Patent
active
043439926
ABSTRACT:
A V-shaped element has a central bore at its vertex of diameter corresponding to the diameter of the motor shaft upon which an optical encoder assembly is to be mounted. The arms of the V-shape extend radially at 90.degree. to each other from the center of the bore at the vertex and terminate in engaging stops at precise equal radial distances from the center of the bore at the vertex. This radial distance corresponds precisely to the radius of the outside diameter of the circular periphery of the mounting member portion of the encoder assembly carrying the light source for the optical encoder. Exact concentric centering of the mounting member carrying the light source is maintained by the V-shaped element by engagement of the ends of the arms with the circular periphery of the mounting member while the motor shaft is received in the central bore so that the mounting member can be rigidly secured to the motor. Thereafter, the V-shaped element is removed and the remaining components of the optical encoder assembled with assurance of proper alignment between the light source and the photo cell part of the assembly.
REFERENCES:
patent: 3900732 (1975-08-01), Costales
patent: 4209692 (1980-06-01), Hudspeth
Nelms David C.
Pastoriza Ralph B.
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