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Class Information
Number: 250/231.17
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 > With means to indicate a complete shaft rotation
Description: Subject matter in which means are provided to determine whether a complete revolution of the shaft has occurred and to generate a signal representative of that fact.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7449678 |
Optical encoder having reference position detection |
Nov. 11, 2008 |
| 7435946 |
Mark detector using multiple light beams for use in a displacement detector and an image forming apparatus |
Oct. 14, 2008 |
| 7399956 |
Optical encoder with sinusoidal photodetector output signal |
Jul. 15, 2008 |
| 7391012 |
Apparatus for detecting rotational angle of rotational element and detecting method thereof |
Jun. 24, 2008 |
| 7391009 |
Angle-measuring system having irregular reference mark that is dedicated without time delay |
Jun. 24, 2008 |
| 7291832 |
Optical encoders for position measurements |
Nov. 6, 2007 |
| 7280049 |
Encoder runout error correction circuit |
Oct. 9, 2007 |
| 7202468 |
Power transfer device with contactless optical encoder and color reflective surface |
Apr. 10, 2007 |
| 7138623 |
Power transfer device with contactless optical encoder and color reflective surface |
Nov. 21, 2006 |
| 7135673 |
Imaging rotation angle absolute encoder |
Nov. 14, 2006 |
| 7126107 |
Methods and apparatuses for sensing rotational position of a component in a printing device |
Oct. 24, 2006 |
| 7091474 |
Rotation angle detecting device |
Aug. 15, 2006 |
| 7085638 |
Steering angle sensor assembly including reduction gear and logic module |
Aug. 1, 2006 |
| 7045769 |
Optical encoders for position measurements |
May. 16, 2006 |
| 6992278 |
Homing process |
Jan. 31, 2006 |
| 6946648 |
Opto-electronic device for angle generation of ultrasonic probe |
Sep. 20, 2005 |
| 6895069 |
Apparatus for counting rotation frequency of numeral wheel of meter for remote meter reading system |
May. 17, 2005 |
| 6873264 |
Method and apparatus for detecting angular phase difference |
Mar. 29, 2005 |
| 6844542 |
Marked plate for a rotational angle sensor element, an angular sensor element for rotating structural parts, and a process for determining a reference value |
Jan. 18, 2005 |
| 6839051 |
Two-axis cursor control apparatus |
Jan. 4, 2005 |
| 6563108 |
System for tracking angular and linear motion |
May. 13, 2003 |
| 6525309 |
Optoelectronic sensor |
Feb. 25, 2003 |
| RE37969 |
Optical displacement sensor and torque sensor employing relatively movable slit patterns |
Jan. 28, 2003 |
| 6465773 |
Optical measurement module for measuring angles and/or distances |
Oct. 15, 2002 |
| 6420697 |
Steering angle sensor |
Jul. 16, 2002 |
| 6380536 |
Rotation angle detector for detecting a rotational position of a steering wheel of a vehicle |
Apr. 30, 2002 |
| 6323786 |
Absolute-value encoder device |
Nov. 27, 2001 |
| 6057976 |
Apparatus for detecting rotational displacement information of a rotating object |
May. 2, 2000 |
| 6043483 |
Apparatus and method using an indexed-encoder to sense the absolute position of an object with a single set of optics |
Mar. 28, 2000 |
| 6028304 |
Precision displacement reference system |
Feb. 22, 2000 |
| 5939713 |
Optical sensing system using two sensors to generate position signals |
Aug. 17, 1999 |
| 5929789 |
Single channel incremental position encorder with incorporated reference mark |
Jul. 27, 1999 |
| 5900930 |
Angle sensor using a multi-pixel optical device |
May. 4, 1999 |
| 5874732 |
Rotation sensor |
Feb. 23, 1999 |
| 5856872 |
Vernier index position sensor |
Jan. 5, 1999 |
| 5841132 |
Optical displacement sensor and torque sensor employing relatively movable slit patterns |
Nov. 24, 1998 |
| 5724130 |
Technique for the measurement and calibration of angular position |
Mar. 3, 1998 |
| 5701007 |
Method of aligning a light pathway for an optics apparatus |
Dec. 23, 1997 |
| 5680211 |
Apparatus for optically detecting displacement of an object using a synthesizing means utilizing a substrate with two diffraction gratings thereon |
Oct. 21, 1997 |
| 5612544 |
Measuring device with an integrated light scanning means which scans both rotations of a rotating body and coded data associated with the rotating body |
Mar. 18, 1997 |
| 5610394 |
Rotation monitor disturbance neutralization system |
Mar. 11, 1997 |
| 5594241 |
Apparatus and method for jitter attenuation in rotary encoders |
Jan. 14, 1997 |
| 5488240 |
Apparatus and method for rotating an optical element using a moving coil in a constant magnetic field |
Jan. 30, 1996 |
| 5410246 |
Method for detection of a marked element in proximity to a sensor |
Apr. 25, 1995 |
| 5390151 |
Method and device for measuring the center of rotation of a rotating shaft |
Feb. 14, 1995 |
| 5331154 |
Rotary encoder for detecting a rotating position of a motor |
Jul. 19, 1994 |
| 5243188 |
Neutral position detector for steering wheels having a first and second rotors with aligned slots |
Sep. 7, 1993 |
| 5212380 |
Automotive engine control system with rotary encoder indexing |
May. 18, 1993 |
| 5148020 |
Optical encoder with photodetectors of width equal to and one-half of code wheel's window and spoke width |
Sep. 15, 1992 |
| 5130641 |
Eddy wheel edge sensor |
Jul. 14, 1992 |
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