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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 |
| 6946649 |
Rotary encoder and position adjuster therefor |
Sep. 20, 2005 |
| 6937349 |
Systems and methods for absolute positioning using repeated quasi-random pattern |
Aug. 30, 2005 |
| 6933492 |
Optical position transducer |
Aug. 23, 2005 |
| 6927388 |
Optical encoder |
Aug. 9, 2005 |
| 6927704 |
Fault tolerant optoelectronic position sensor |
Aug. 9, 2005 |
| 6919559 |
High-temperature optical rotary and linear position sensor |
Jul. 19, 2005 |
| 6919558 |
Positioning apparatus and assembly thereof |
Jul. 19, 2005 |
| 6917034 |
Electronic equipment equipped with position detection means for detecting position of moving body utilizing incremental-type encoder |
Jul. 12, 2005 |
| 6914235 |
Position measuring system and method for operating a position measuring system |
Jul. 5, 2005 |
| 6914234 |
Optical encoder and scale for encoder |
Jul. 5, 2005 |
| 6900428 |
Method for optimizing performance of optical encoders operating in a fluid |
May. 31, 2005 |
| 6897435 |
Encoder self-callibration apparatus and method |
May. 24, 2005 |
| 6895355 |
Method and apparatus for calibrating an incremental count of movement |
May. 17, 2005 |
| 6895069 |
Apparatus for counting rotation frequency of numeral wheel of meter for remote meter reading system |
May. 17, 2005 |
| 6891150 |
Optical scale formed from mold having fixed and movable platens |
May. 10, 2005 |
| 6888126 |
Coded disc for an optoelectronic displacement or angle measuring device |
May. 3, 2005 |
| 6884991 |
Steering wheel angle sensor |
Apr. 26, 2005 |
| 6881949 |
Method and system for synchronizing information specific to a location on a surface with an external source |
Apr. 19, 2005 |
| 6879405 |
Displacement pickup |
Apr. 12, 2005 |
| 6872934 |
Optical detector apparatus |
Mar. 29, 2005 |
| 6869158 |
Liquid container with identifying means and method for detecting state of mount of liquid container |
Mar. 22, 2005 |
| 6867412 |
Scale structures and methods usable in an absolute position transducer |
Mar. 15, 2005 |
| 6847031 |
Intermittent operating type pointing device |
Jan. 25, 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 |
| 6844541 |
Rapid high resolution position sensor for auto steering |
Jan. 18, 2005 |
| 6838654 |
Photodetection system and circuit for amplification |
Jan. 4, 2005 |
| 6835924 |
Optical encoder for detecting changes in diffraction interference patterns |
Dec. 28, 2004 |
| 6831267 |
Optical encoder |
Dec. 14, 2004 |
| 6829055 |
Angular position sensor assembly for use with steering column |
Dec. 7, 2004 |
| 6828548 |
Optical displacement measuring device |
Dec. 7, 2004 |
| 6822219 |
Timing device |
Nov. 23, 2004 |
| 6822220 |
Optical pattern for an optical encoder |
Nov. 23, 2004 |
| 6818884 |
Optoelectronic sensor having transparent cover shaped as light deflecting element |
Nov. 16, 2004 |
| 6816091 |
Interpolator |
Nov. 9, 2004 |
| 6803560 |
Optical encoder |
Oct. 12, 2004 |
| 6800842 |
Optical encoder and sensor head of the same |
Oct. 5, 2004 |
| 6800843 |
Displacement and torque sensor |
Oct. 5, 2004 |
| 6797940 |
Optical encoder with triple photodiode |
Sep. 28, 2004 |
| 6794636 |
Opto-electronic system |
Sep. 21, 2004 |
| 6794637 |
Optical device for measuring position |
Sep. 21, 2004 |
| 6794638 |
Photoelectric encoder having improved light-emitting and photoreceptive sections |
Sep. 21, 2004 |
| 6784417 |
Optical encoder |
Aug. 31, 2004 |
| 6774355 |
Optical encoder |
Aug. 10, 2004 |
| 6768101 |
High resolution optical encoder with an angular collimated light beam |
Jul. 27, 2004 |
| 6768100 |
Continuous position calibration for servo controlled rotary system |
Jul. 27, 2004 |
| 6765195 |
Method and apparatus for two-dimensional absolute optical encoding |
Jul. 20, 2004 |
| 6759648 |
Sensor for sensing absolute angular position of a rotatable body |
Jul. 6, 2004 |
| 6756581 |
Deviation detecting device, rotary laser apparatus with the same, and position determining system with deviation detecting/correcting device |
Jun. 29, 2004 |
| 6756582 |
Position transducer |
Jun. 29, 2004 |
| 6750445 |
Encoder |
Jun. 15, 2004 |
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