Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-02-28
1995-09-19
Allen, Stephone B.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250229, 361177, G01V 904
Patent
active
054517702
ABSTRACT:
A solid state machine controller for actuating a machine. The machine controller requires near simultaneous interruption of two photo-optic beams by fingers from both operator hands to actuate the machine. The beams are part of switches located at opposite ends of a tubular enclosure. The photo-optic beams are located in annular openings surrounded by embossed rings to prevent beam generator and receiver soiling as well as accidental machine actuation.
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