Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Electrical & Energy
Class Information
Number: 250/202
Name: Radiant energy > Photocells; circuits and apparatus > Photocell controls its own optical systems > Following a pattern (e.g., line or edge)
Description: Subject matter having means for illuminating the photocell in accordance with the relative position of the photocell and a pattern, and having means for causing the photocell to follow the edge of the pattern under control of said illumination, or for causing the optical path between pattern and photocell to change, under the control of said illumination, so that the photocell follows the edge of the pattern image.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
4644146 Robotic vehicle optical guidance system Feb. 17, 1987
4641021 Variable bandwidth low-pass filter for line tracer accuracy control Feb. 3, 1987
4641020 Optical head position control device Feb. 3, 1987
4629878 Optical apparatus for controlling a tool Dec. 16, 1986
4625104 Dual scan optical pattern tracer Nov. 25, 1986
4616354 Tracking control arrangements for use in optical disc players Oct. 7, 1986
4615023 Beam access apparatus for optical disc system Sep. 30, 1986
4613749 Pattern tracer using matrix sensor Sep. 23, 1986
4603410 Error signal generating device for use in an apparatus for optically reading information with a resistance network connected to photo detector elements Jul. 29, 1986
4589102 Device for compensating the lack of balance of a deviating mirror belonging to an optical system for illuminating a data medium May. 13, 1986
4587414 Apparatus for adjusting the position of an edge with surface portions reflecting different wavelengths of light May. 6, 1986
4578574 Pattern tracer with variable effective forward offset and method Mar. 25, 1986
4573547 Automatic running work vehicle Mar. 4, 1986
4569039 Optical information output device Feb. 4, 1986
4568825 Robotic vehicle optical guidance system Feb. 4, 1986
4567347 Measurement head for welding machines Jan. 28, 1986
4563760 Method of detecting light spot control signal Jan. 7, 1986
4562565 Tracking servo system Dec. 31, 1985
4561061 Method of tracing/recording image lines and apparatus therefor Dec. 24, 1985
RE32051 Tracking system and method for video disc player Dec. 17, 1985
4555780 Optical recording and playback unit Nov. 26, 1985
4544838 Method and apparatus for detecting tracking error Oct. 1, 1985
4541082 Device for optically tracking information Sep. 10, 1985
4535431 Optical track follower device with sampling Aug. 13, 1985
4532522 Optical recording apparatus Jul. 30, 1985
4525823 Optical tracking system Jun. 25, 1985
4518052 Apparatus for automatically measuring height May. 21, 1985
4518856 Line sensing method and apparatus May. 21, 1985
4517666 Optical head May. 14, 1985
4512002 Tracking servo system of recording disc information recording and reproducing apparatus Apr. 16, 1985
4506149 Tracking servo signal generating device in an apparatus for reading recorded information Mar. 19, 1985
4501950 Adaptive welding system Feb. 26, 1985
4498110 Optical disc reproducing apparatus Feb. 5, 1985
4492465 Retro-reflective electro-optical angle measuring system Jan. 8, 1985
4491490 Control device and method for gluing together continuous form sets Jan. 1, 1985
4488275 Tracking system for video disc player Dec. 11, 1984
4486654 Optical pattern tracing system with improved manual control Dec. 4, 1984
4482960 Robot tractors Nov. 13, 1984
4482987 Optical information reproducing apparatus Nov. 13, 1984
4479051 Apparatus for driving objective lens in tracking direction Oct. 23, 1984
4476555 Tracking servo apparatus for an optical information reproducing system Oct. 9, 1984
4454415 Tracking mirror assembly and control system for an optical data storage disc Jun. 12, 1984
4453084 Optical pattern tracing system Jun. 5, 1984
4446545 Apparatus for reading a disk-shaped record carrier May. 1, 1984
4443103 Retro-reflective electro-optical angle measuring system Apr. 17, 1984
4441020 Method for tracing an object Apr. 3, 1984
4433912 Method and a circuit for determining a contour in an image Feb. 28, 1984
4426694 Beam position detecting device for optical disc apparatus Jan. 17, 1984
4423496 Apparatus for reading and/or writing an optically readable information structure Dec. 27, 1983
4417127 Method and apparatus for seam tracking in arc welding Nov. 22, 1983

1 2 3 4 5 6










 
 
  Recently Added Patents
Method for producing purified influenza virus antigen
Resuming piecewise calibration of a real-time-clock unit after a measured offset that begins at the next calibration period
Support core for cold shrink tube
Pandemic protocol for emergency dispatch
DNA promoters and anthrax vaccines
Prevention and treatment of osteoarthritis
Method, apparatus and article for detection of transponder tagged objects, for example during surgery
  Randomly Featured Patents
Method of manufacturing an optical fiber connector
Isoindolone derivatives, preparation process and intermediates of this process, their use as medicaments, and pharmaceutical compositions comprising them
Keyhole-less electronic lock
Doherty amplifier and method for operation thereof
Method of automatically calibrating a microprocessor controlled digital multimeter
Retractable ramp system for a mobility vehicle
Front face of a vehicle wheel
Wrought lead-calcium-strontium-tin (.+-.barium) alloy for battery components
Open fryer griddle
Surface acoustic wave filter