Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1994-08-25
1996-05-21
Epps, Georgia Y.
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
25053902, 356375, 355212, G01N 2186
Patent
active
055192300
ABSTRACT:
A sensor having a shutter mounted upon a shaft for rotation within a housing in opposition to a light path between an LED and photodetector is described. A potion of the shaft extends outside the housing connected to an elongated arm. A runner secured to the elongated arm, engages a moving photosensitive surface and deviations of the edge position of the photosensitive surface rotate the shutter in relation to the light path between the LED and photodetector for tracking the edge position of the moving photosensitive surface by providing signals representing shutter position.
REFERENCES:
patent: 3219829 (1965-11-01), Reist
patent: 3533692 (1968-02-01), Blanchette et al.
patent: 3620614 (1971-11-01), Gunto et al.
patent: 4082465 (1978-04-01), Bickl et al.
patent: 4864124 (1989-09-01), Mirabella, Jr. et al.
patent: 4959040 (1990-09-01), Gardner et al.
patent: 5347348 (1994-09-01), Nagata
Costanza Daniel W.
Furst Michael R.
Hinton Edward T.
Hubble, III Fred F.
Chapuran Ronald F.
Epps Georgia Y.
Skady Jacqueline M.
Xerox Corporation
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