Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-08-03
1990-11-20
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356376, G01N 2186
Patent
active
049720902
ABSTRACT:
An inspection and measuring apparatus comprises a housing, having a holder for supporting a workpiece for rotation about a first vertical axis and for limited rotation about an orthogonal axis, a light beam supported out from a second vertical axis for positioning for selective interruption by the workpiece upon rotation of the light beam means for detecting the coordinate position of interruption of the beam by the workpiece and comparing same to a reference.
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