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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:
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Patent Number Title Of Patent Date Issued
8712506 Medical imaging probe with rotary encoder Apr. 29, 2014
8674288 Motor assembly sensor capture systems and methods Mar. 18, 2014
8659448 Movement detection device Feb. 25, 2014
8637804 Rotary position encoder Jan. 28, 2014
8618467 Absolute encoder that detects an absolute position of an object Dec. 31, 2013
8610050 Optical displacement detection apparatus Dec. 17, 2013
8546743 Encoder in which the relative displacement between the encoder scale and encoder head is detected Oct. 1, 2013
8525101 Position transmitter having a normal mode and a power saving mode operation for the acquisition of the position of a rotatable shaft Sep. 3, 2013
8476580 Angle-measuring device and line of products with such angle-measuring devices Jul. 2, 2013
8476577 Optical encoder Jul. 2, 2013
8471554 Encoder module with an alignment system Jun. 25, 2013
8422025 Optical encoder for obtaining displacement information of object Apr. 16, 2013
8395535 Photoelectric encoder Mar. 12, 2013
8389925 Optical encoder device comprising a moveable slit plate and a stationary slit plate Mar. 5, 2013
8357891 Speed detection device, image forming device, and computer readable storage medium storing speed detection program Jan. 22, 2013
8356132 Position sensing system for a KVM switch Jan. 15, 2013
8325066 Photoelectric encoder Dec. 4, 2012
8309906 Absolute optical encoder with long range intensity modulation on scale Nov. 13, 2012
8278616 Position detector and exposure apparatus Oct. 2, 2012
8258459 Optical encoder and motor system comprising dual decentered annular slits Sep. 4, 2012
8247758 Optical jog wheel with spiral coding element Aug. 21, 2012
8227744 Absolute position length measurement type encoder Jul. 24, 2012
8218134 Rotation and differential angle optical sensor with non-transition pattern sampling Jul. 10, 2012
8154427 Multiturn rotary encoder and method of operating a multiturn rotary encoder Apr. 10, 2012
8138468 Rotary disk eccentricity measurement method, rotary encoder, and image forming apparatus including the rotary encoder Mar. 20, 2012
8110792 Absolute position length measurement type encoder Feb. 7, 2012
8094323 Displacement encoder including phosphor illumination source Jan. 10, 2012
8069580 Measuring device for determining a position and/or a speed Dec. 6, 2011
8044339 Intensity-based optical encoder using digital diffractive optic regions Oct. 25, 2011
8044340 Encoder and light receiving device for encoder Oct. 25, 2011
8022354 Absolute position length measurement type encoder Sep. 20, 2011
7994470 Photoelectric encoder Aug. 9, 2011
7982176 Absolute position length measurement type encoder Jul. 19, 2011
7969114 Motor driving system compatible with different types of encoders Jun. 28, 2011
7952065 Position detector and a detected element having a pattern for generating a position signal formed thereon May. 31, 2011
7907505 Code disk with a plurality of tracks having different patterns Mar. 15, 2011
7902493 Rotation angle transmitter and method of scanning a code disc of a rotation angle transmitter Mar. 8, 2011
7825369 Displacement sensor, method for detecting the optimal reference position, and method for judging stability of detecting reference position of displacement sensor Nov. 2, 2010
7825367 Rotary encoder Nov. 2, 2010
7825368 Absolute position length-measurement type encoder Nov. 2, 2010
7820957 Optical encoder for detecting movement of a moving object and electronic equipment including the optical encoder Oct. 26, 2010
7820956 Optical position transducer systems and methods employing reflected illumination for limited rotation motor systems Oct. 26, 2010
7797127 Method for determining two pseudo-sinusoidal signals in quadrature Sep. 14, 2010
7763843 Optical navigation system for rotary control based non-contact controller Jul. 27, 2010
7751058 Optical rotation counter Jul. 6, 2010
7732756 User navigation device with a code wheel and an encoder Jun. 8, 2010
7679533 Photodiode array for an optical encoder, photodiode detection system, and optical encoder Mar. 16, 2010
7675026 Optical jog wheel with spiral coding element Mar. 9, 2010
7663093 Absolute position encoder having a second incremental track integrated with the absolute track Feb. 16, 2010
7619209 Encoder with a combined position and index track Nov. 17, 2009

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