Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1986-09-22
1989-10-31
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
377 53, H01J 4014
Patent
active
048779547
ABSTRACT:
An apparatus for counting hangers having a convex surface includes a housing having a central light source carried by the housing for projecting a light beam on the convex surface. A pair of spaced light detectors is positioned on the housing substantially on opposed sides of the central light source, the spaced light detectors detect light reflected from the convex surface. A detecting circuit is connected to the pair of spaced light detectors and detects the sequence of reflected light beams, and then determines whether the detected sequence is a sequence of reflected light beams characteristic of the relative displacement of the housing and the convex surface when the housing or the convex surface is displaced in substantially the direction of the space between the pair of opposed light detectors.
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Bergman Andrew
Heidt Thomas D.
Neuman Arnold I.
Wickstead James
Kaplan Blum
Nelms David C.
Neuman Arnold I.
Ruoff Jessica
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