Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-05-03
2008-11-25
Luu, Thanh X (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C091S001000, C123S478000
Reexamination Certificate
active
07456385
ABSTRACT:
A system and a method detect that a movable element within an interior of a compartment is at an end of a stroke and/or a beginning of the stroke within the interior of the compartment. A switch and/or an electrical circuit is connected to the compartment for detecting that the movable element may be at the beginning of and/or at the end of the stroke. A microprocessor is connected to the switch or to the electrical circuit for detecting that the movable element is at the end of and/or at the beginning of the stroke within the interior of the compartment. An end cap having a light detector is connected to the compartment to measure an intensity of the light within an interior of the end cap which is attenuated by and/or is diffused by a surface of the movable element and/or of the compartment. The intensity of the light within the interior of the end cap corresponds to a position of the movable element within the interior of the compartment. The light detector determines the position of the movable element which is at the end of the stroke, at the beginning of the stroke and/or between the end of the stroke and the beginning of the stroke via the intensity of light within the interior of the end cap.
REFERENCES:
patent: 3368751 (1968-02-01), Merill
patent: 3885872 (1975-05-01), Howe, Jr. et al.
patent: 4150299 (1979-04-01), Kasiewicz et al.
patent: 4488528 (1984-12-01), Morikawa
patent: 4501642 (1985-02-01), Wells
patent: 4661695 (1987-04-01), Mori et al.
patent: 4736674 (1988-04-01), Stoll
patent: 4806707 (1989-02-01), Landmeier
patent: 4902903 (1990-02-01), Sergson et al.
patent: 4970361 (1990-11-01), Fuse
patent: 5182979 (1993-02-01), Morgan
patent: 5231959 (1993-08-01), Smietana
patent: 5271505 (1993-12-01), Low
patent: 5705742 (1998-01-01), Fox et al.
patent: 5744705 (1998-04-01), Derouen et al.
patent: 5799626 (1998-09-01), Ponsford et al.
patent: 5977778 (1999-11-01), Chan et al.
patent: 5988676 (1999-11-01), Lotito et al.
patent: 6058776 (2000-05-01), Algers et al.
patent: 6170573 (2001-01-01), Brunet et al.
patent: 6484620 (2002-11-01), Arshad et al.
patent: 6952009 (2005-10-01), Engstrand
U.S. Appl. No. 11/238,893, filed Sep. 9, 2005, Engstrand.
U.S. Appl. No. 11/242,799, filed Oct. 3, 2005, Engstrand.
Luu Thanh X
Patents&TMS, P.C.
Phaedrus, LLC
LandOfFree
System and method for detecting an end of and/or a beginning... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for detecting an end of and/or a beginning..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for detecting an end of and/or a beginning... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4025286