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Class Information
Number: 250/231.13
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Light valve (e.g., iris diaphragm) > Actuated by dynamic external physical quantity > Shaft angle transducers
Description: Subject matter wherein the angular position or speed or a rotatable shaft is the active external physical quantity sensed by one or more photocells and an output is generated which is indicative of those parameters.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7432496 |
Encoder scale writing or calibration at an end-use installation based on correlation sensing |
Oct. 7, 2008 |
| 7432495 |
Sensor arrangement for a coating system |
Oct. 7, 2008 |
| 7425697 |
Origin detection method for optical encoder |
Sep. 16, 2008 |
| 7420157 |
Optical encoder having wiring substrate light source, and/or photodetector covered by light transmitting material and its manufacturing method |
Sep. 2, 2008 |
| 7417218 |
Triple grating optical encoder with light transmitting area in optical path |
Aug. 26, 2008 |
| 7414238 |
Optical encoder device for small-sized motor and method of producing the same |
Aug. 19, 2008 |
| 7405392 |
Optical rotary encoder |
Jul. 29, 2008 |
| 7405393 |
Position encoder |
Jul. 29, 2008 |
| 7402792 |
Optical sensor with rotary shaft-driven light intercepting member |
Jul. 22, 2008 |
| 7400269 |
Coding element with integrated limit switch |
Jul. 15, 2008 |
| 7394061 |
Optical encoder with integrated index channel |
Jul. 1, 2008 |
| 7394062 |
Displacement-measuring optical scale and optical encoder using same |
Jul. 1, 2008 |
| 7394219 |
Encoder unit and process of assembling same |
Jul. 1, 2008 |
| 7391009 |
Angle-measuring system having irregular reference mark that is dedicated without time delay |
Jun. 24, 2008 |
| 7385178 |
Reflective encoders with various emitter-detector configurations |
Jun. 10, 2008 |
| 7382295 |
Control unit for electric power steering apparatus |
Jun. 3, 2008 |
| 7381942 |
Two-dimensional optical encoder with multiple code wheels |
Jun. 3, 2008 |
| 7377435 |
Optical encoder |
May. 27, 2008 |
| 7378643 |
Optical projection encoder with patterned mask |
May. 27, 2008 |
| 7368705 |
Absolute encoder employing linked sub-encoders and beat track |
May. 6, 2008 |
| 7365304 |
Angular position measuring device having a movable stop element to limit the axial spring motion between a maching part and a second assembly and measuring system having such an angular positi |
Apr. 29, 2008 |
| 7359826 |
Method and device for detection of oscillations by a position measuring system |
Apr. 15, 2008 |
| 7358865 |
Optical encoder and apparatus using optical encoder |
Apr. 15, 2008 |
| 7358481 |
Reflective encoder with three-dimensional code carrier |
Apr. 15, 2008 |
| 7358480 |
System and method for re-synchronizing an access barrier with a barrier operator |
Apr. 15, 2008 |
| 7358479 |
Method and computed tomography gantry for measurement of rotation angle of rotor |
Apr. 15, 2008 |
| 7355165 |
Optical encoder and method for using same |
Apr. 8, 2008 |
| 7348547 |
Position detecting apparatus and image processing apparatus provided with the same |
Mar. 25, 2008 |
| 7348546 |
Position measuring system with a scanning unit having a reference pulse signal detection unit |
Mar. 25, 2008 |
| 7348545 |
System and method for optical encoding on two opposed surfaces of a pattern medium |
Mar. 25, 2008 |
| 7348544 |
Optical encoder with discontinuous optical grating |
Mar. 25, 2008 |
| 7348543 |
Optical encoder with hollow light guide for indicating the angular position of a rotary shaft |
Mar. 25, 2008 |
| 7345272 |
Optical decoder systems and corresponding methods |
Mar. 18, 2008 |
| 7345273 |
Integrated optical encoder |
Mar. 18, 2008 |
| 7339158 |
Rotary encoder |
Mar. 4, 2008 |
| 7332709 |
Photoelectric encoder |
Feb. 19, 2008 |
| 7332708 |
Optical encoder |
Feb. 19, 2008 |
| 7329858 |
Optical encoder and electronic equipment having same |
Feb. 12, 2008 |
| 7329859 |
Photoelectric encoder |
Feb. 12, 2008 |
| 7330326 |
Recordable disk rotational speed error correction circuit |
Feb. 12, 2008 |
| 7326918 |
Optical position sensor architecture for servo systems |
Feb. 5, 2008 |
| 7321113 |
Precision material-handling robot employing high-resolution, compact absolute encoder |
Jan. 22, 2008 |
| 7317183 |
High performance reflectivity optical encoder with a protrusion between lenses |
Jan. 8, 2008 |
| 7312436 |
Optical position measuring system with a detector arrangement and measuring graduation to produce partial filtering of undesired harmonics |
Dec. 25, 2007 |
| 7306239 |
Height control system and sensor therefor |
Dec. 11, 2007 |
| 7307789 |
Photoelectric encoder |
Dec. 11, 2007 |
| 7304295 |
Method and system of detecting eccentricity and up/down movement of a code wheel of an optical encoder set |
Dec. 4, 2007 |
| 7304294 |
Reflective encoder with reduced background noise |
Dec. 4, 2007 |
| 7301140 |
Scanning device for scanning a scale graduation, and position measuring system utilizing the same |
Nov. 27, 2007 |
| 7301141 |
Photoelectric encoder and electric device provided with the same |
Nov. 27, 2007 |
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