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Class Information
Number: 250/221
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Controlled by article, person, or animal
Description: Subject matter in which the optical path between the light source and the photocell is directly affected by an object which is movable with respect to, is not part of and is not continuously associated with the photocell device.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6794639 |
Optoelectronic sensor device |
Sep. 21, 2004 |
| 6791074 |
Light curtain system for establishing a protective light curtain, tool and system for processing objects and method for loading/unloading a tool |
Sep. 14, 2004 |
| 6791100 |
Object detection using code-modulated light beam |
Sep. 14, 2004 |
| 6787756 |
Semiconductor laser-based area scanner |
Sep. 7, 2004 |
| 6788875 |
Suspension system for use in an optical displacement detection system |
Sep. 7, 2004 |
| 6784415 |
Method of installing a multi-beam photoelectric safeguard system and method of adjusting its optical axes |
Aug. 31, 2004 |
| 6781110 |
Apparatus and method for measuring vehicle speed and/or acceleration |
Aug. 24, 2004 |
| 6781676 |
Structured lighting detection of vehicle occupant type and position |
Aug. 24, 2004 |
| 6778092 |
Method of, and apparatus for, controlling a safety-specific function of a machine |
Aug. 17, 2004 |
| 6774351 |
Low-power surface for an optical sensor |
Aug. 10, 2004 |
| 6774352 |
Multi-beam photoelectric sensor and its mount |
Aug. 10, 2004 |
| 6770863 |
Apparatus and method for three-dimensional relative movement sensing |
Aug. 3, 2004 |
| 6770864 |
Light beam operated personal interfaces to computers |
Aug. 3, 2004 |
| 6770869 |
Method of automatic standardized calibration for infrared sensing device |
Aug. 3, 2004 |
| 6768128 |
Ultrasonic-welding apparatus, optical sensor and rotation sensor for the ultrasonic-welding apparatus |
Jul. 27, 2004 |
| 6765191 |
Roller switch |
Jul. 20, 2004 |
| 6765192 |
Processing system with protective device for secure processing table |
Jul. 20, 2004 |
| 6765193 |
Optical touch switch structures |
Jul. 20, 2004 |
| 6762747 |
Coordinate input detection device and method for electronic blackboard |
Jul. 13, 2004 |
| 6752253 |
Guard means for machines, more particularly pressbrakes, guillotines, stamping machines and the like |
Jun. 22, 2004 |
| 6753519 |
Arrangement for the detection of relative movements or relative positions of two objects |
Jun. 22, 2004 |
| 6750439 |
Light curtain generating device including single-beam optical modules |
Jun. 15, 2004 |
| 6750440 |
Opto-electrical actuation system and method |
Jun. 15, 2004 |
| 6750441 |
Sensor for automatic doors |
Jun. 15, 2004 |
| 6747747 |
Apparatus for determining a distance profile |
Jun. 8, 2004 |
| 6744034 |
Micro-electromechanical apparatus and method with position sensor compensation |
Jun. 1, 2004 |
| 6744365 |
Vehicle door stop safety system |
Jun. 1, 2004 |
| 6740860 |
Photodetector, photosensing position detector, coordinate input device, coordinate input/output apparatus, and photodetection method |
May. 25, 2004 |
| 6740862 |
Optical transducers and methods of making same |
May. 25, 2004 |
| 6740863 |
Joystick |
May. 25, 2004 |
| 6737631 |
Movement detector with tapering kaleidoscopic mirrors and method of installing such a detector |
May. 18, 2004 |
| 6737632 |
Control device with mobile component mounted on a ball pivot |
May. 18, 2004 |
| 6737633 |
System and method for identifying overlapping mail pieces |
May. 18, 2004 |
| 6734450 |
Three-dimensional image capturing device |
May. 11, 2004 |
| 6730902 |
Light beam sensor |
May. 4, 2004 |
| 6727488 |
Photoreceptor circuit switchable between operating modes |
Apr. 27, 2004 |
| 6727489 |
Automatic image-quality adjustment system |
Apr. 27, 2004 |
| 6727511 |
Sensor array system for object position detection |
Apr. 27, 2004 |
| 6720545 |
Photoelectric sensor, control method therefor and semiconductor integrated circuit therefor |
Apr. 13, 2004 |
| 6720884 |
Sensor mounting system |
Apr. 13, 2004 |
| 6717523 |
Photoelectric switch |
Apr. 6, 2004 |
| 6717684 |
Target scoring system |
Apr. 6, 2004 |
| 6713750 |
Visible light forklift alignment apparatus |
Mar. 30, 2004 |
| 6713751 |
Easily assembled optical fiber sensor and musical instrument using the same |
Mar. 30, 2004 |
| 6713752 |
Methods of sampling a surface having a micro-texture |
Mar. 30, 2004 |
| 6714131 |
Anti-thief security sensor assembly using the opening of the projector cover for beam adjustment |
Mar. 30, 2004 |
| 6710323 |
Optical signal detection method and apparatus for a computer mouse |
Mar. 23, 2004 |
| 6710325 |
Light curtain mounting system wherein housing and mounting bracket include curved surfaces |
Mar. 23, 2004 |
| 6710326 |
Photoelectric sensor having special display features |
Mar. 23, 2004 |
| 6707027 |
Method of measuring the movement of an input device |
Mar. 16, 2004 |
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