Photocell for detecting limited moving shadow areas
First Claim
4. OBJECT DETECTING AND SIGNAL GENERATING APPARATUS COMPRISING, IN COMBINATION, A VOLTAGE SOURCE, A PHOTOCELL HAVING A PAIR OF SPACED ELECTRODES AND A BROAD EXPOSED INTER-ELECTRODE AREA OF PHOTOSENSITIVE MATERIAL, SAID PHOTOCELL COUPLED TO SAID VOLTAGE SOURCE, A LIGHT SOURCE SPACED FROM SAID PHOTOCELL, A UTILIZATION DEVICE COUPLED TO SAID PHOTOCELL AND SAID VOLTAGE SOURCE, TRANSPARENT CARRIER MEANS FDOR SUPPORTING SAID OBJECT INTERMEDIATE SAID LIGHT SOURCE AND SAID PHOTOCELL, SAID CARRIER MEANS BEING POSITIONED RELATIVE TO SAID PHOTOCELL SO AS TO PROJECT A SHADOW OF THE OBJECT TOWARDS SAID PHOTOCELL WITH SAID SHADOW CUTTING ENTIRELY ACROSS THE LATTER, MEANS FOR EFFECTING RELATIVE MOVEMENT BETWEEN SAID CARRIER MEANS AND SAID PHOTOCELL
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Accused Products
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4 Claims
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4. OBJECT DETECTING AND SIGNAL GENERATING APPARATUS COMPRISING, IN COMBINATION, A VOLTAGE SOURCE, A PHOTOCELL HAVING A PAIR OF SPACED ELECTRODES AND A BROAD EXPOSED INTER-ELECTRODE AREA OF PHOTOSENSITIVE MATERIAL, SAID PHOTOCELL COUPLED TO SAID VOLTAGE SOURCE, A LIGHT SOURCE SPACED FROM SAID PHOTOCELL, A UTILIZATION DEVICE COUPLED TO SAID PHOTOCELL AND SAID VOLTAGE SOURCE, TRANSPARENT CARRIER MEANS FDOR SUPPORTING SAID OBJECT INTERMEDIATE SAID LIGHT SOURCE AND SAID PHOTOCELL, SAID CARRIER MEANS BEING POSITIONED RELATIVE TO SAID PHOTOCELL SO AS TO PROJECT A SHADOW OF THE OBJECT TOWARDS SAID PHOTOCELL WITH SAID SHADOW CUTTING ENTIRELY ACROSS THE LATTER, MEANS FOR EFFECTING RELATIVE MOVEMENT BETWEEN SAID CARRIER MEANS AND SAID PHOTOCELL
Specification
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Current AssigneeRobert J. Robinson
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Original AssigneeRobert J. Robinson
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InventorsRobinson, Robert J.
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Application NumberUS04/120,565Time in Patent Office1,517 DaysField of SearchUS Class Current250/566CPC Class CodesG06K 7/10841 Particularities of the ligh...
