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Class Information
Number: 250/231.18
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 > Incremental shaft readers; i.e., with means to generate increments of angular shaft rotation > Position indicating shaft encoders with means to generate a unique signal for each specific angular shaft position
Description: Subject matter including means to establish a unique number of shaft angle positions and to generate a unique, distinct signal for each of those positions.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7432497 |
Absolute linear encoder |
Oct. 7, 2008 |
| 7415173 |
Position sensor |
Aug. 19, 2008 |
| 7406772 |
Device for measuring the position, the path or the rotational angle of an object |
Aug. 5, 2008 |
| 7391012 |
Apparatus for detecting rotational angle of rotational element and detecting method thereof |
Jun. 24, 2008 |
| 7391011 |
Optical encoder capable of detecting absolute position |
Jun. 24, 2008 |
| 7391010 |
Photoelectric encoder and electronic equipment with increased resolution |
Jun. 24, 2008 |
| 7385178 |
Reflective encoders with various emitter-detector configurations |
Jun. 10, 2008 |
| 7348544 |
Optical encoder with discontinuous optical grating |
Mar. 25, 2008 |
| 7348546 |
Position measuring system with a scanning unit having a reference pulse signal detection unit |
Mar. 25, 2008 |
| 7348543 |
Optical encoder with hollow light guide for indicating the angular position of a rotary shaft |
Mar. 25, 2008 |
| 7345273 |
Integrated optical encoder |
Mar. 18, 2008 |
| 7312437 |
Displacement sensor, method for detecting the optimal reference position, and method for judging stability of detecting the reference position of displacement sensor |
Dec. 25, 2007 |
| 7304294 |
Reflective encoder with reduced background noise |
Dec. 4, 2007 |
| 7304295 |
Method and system of detecting eccentricity and up/down movement of a code wheel of an optical encoder set |
Dec. 4, 2007 |
| 7276686 |
Method and device for detecting the opening angle of the shutter of an adjustable rotating shutter in a film camera |
Oct. 2, 2007 |
| 7265338 |
Photoelectric encoder using an incoherent semiconductor light source |
Sep. 4, 2007 |
| 7265337 |
Sensing apparatus |
Sep. 4, 2007 |
| 7265336 |
Encoder utilizing a reflective cylindrical surface |
Sep. 4, 2007 |
| 7244929 |
Encoder with absolute signal processing and incremental signal output and method of using such an encoder |
Jul. 17, 2007 |
| 7202468 |
Power transfer device with contactless optical encoder and color reflective surface |
Apr. 10, 2007 |
| 7183538 |
Apparatus for adjusting a signal based on a position of a movable member |
Feb. 27, 2007 |
| 7176449 |
Power transfer device with contactless optical encoder and pitched reflective surface |
Feb. 13, 2007 |
| 7164120 |
Position measuring instrument |
Jan. 16, 2007 |
| 7145131 |
Absolute encoder |
Dec. 5, 2006 |
| 7138623 |
Power transfer device with contactless optical encoder and color reflective surface |
Nov. 21, 2006 |
| 7135673 |
Imaging rotation angle absolute encoder |
Nov. 14, 2006 |
| 7129858 |
Encoding system |
Oct. 31, 2006 |
| 7126108 |
Photodetector array arrangement for optical encoders |
Oct. 24, 2006 |
| 7122818 |
Optical displacement sensor using optical fiber, and external force detecting device |
Oct. 17, 2006 |
| 7112781 |
Absolute encoder |
Sep. 26, 2006 |
| 7095925 |
Optical phased array transmitter/receiver |
Aug. 22, 2006 |
| 7091884 |
Analog position encoder |
Aug. 15, 2006 |
| 7084390 |
Position-measuring device including measuring graduation and scanning unit |
Aug. 1, 2006 |
| 7078677 |
Optical encoder disk having a region that continuously increases in size |
Jul. 18, 2006 |
| 7064316 |
Code (ring) with two pairs of periodic line patterns |
Jun. 20, 2006 |
| 7060968 |
Method and apparatus for optical encoding with compressible imaging |
Jun. 13, 2006 |
| 7041961 |
Device for measurement of rotational angle of two components relative to each other |
May. 9, 2006 |
| 7034283 |
Absolute incremental position encoder and method |
Apr. 25, 2006 |
| 7030368 |
Method for operating a position measuring device and position measuring device suitable therefor |
Apr. 18, 2006 |
| 7026605 |
Angle detection device for rotational body |
Apr. 11, 2006 |
| 6975408 |
Reflection scale and displacement measurement apparatus using the same |
Dec. 13, 2005 |
| RE38882 |
Angle measuring system with a clampable shaft |
Nov. 22, 2005 |
| 6956199 |
Method and apparatus for determining a position of a movable barrier |
Oct. 18, 2005 |
| 6946650 |
Sensor |
Sep. 20, 2005 |
| 6927704 |
Fault tolerant optoelectronic position sensor |
Aug. 9, 2005 |
| 6884991 |
Steering wheel angle sensor |
Apr. 26, 2005 |
| 6878927 |
Method and apparatus for determining a position of a movable barrier |
Apr. 12, 2005 |
| 6873264 |
Method and apparatus for detecting angular phase difference |
Mar. 29, 2005 |
| 6839051 |
Two-axis cursor control apparatus |
Jan. 4, 2005 |
| 6831267 |
Optical encoder |
Dec. 14, 2004 |
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