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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 |
| 6252223 |
Rotary encoder having a disk with a conductive pattern |
Jun. 26, 2001 |
| 6248993 |
Steering angle sensor |
Jun. 19, 2001 |
| 6248994 |
Method and apparatus for determining angular displacement, surface translation, and twist |
Jun. 19, 2001 |
| 6246050 |
Optical encoders using non-patterned targets |
Jun. 12, 2001 |
| 6236039 |
Rotation detecting device for recording and reproducing apparatus and method therefor |
May. 22, 2001 |
| 6232593 |
Optical encoder |
May. 15, 2001 |
| 6225617 |
Method for generating quasi-sinusoidal signals |
May. 1, 2001 |
| 6222183 |
Optical encoder |
Apr. 24, 2001 |
| 6222182 |
Apparatus and method for sampling a phototransistor |
Apr. 24, 2001 |
| 6222181 |
Position measuring instrument measuring relative turning angle of light sources for receiving devices |
Apr. 24, 2001 |
| 6194708 |
Focus-type encode device |
Feb. 27, 2001 |
| 6191415 |
Position transducer |
Feb. 20, 2001 |
| 6184518 |
Rotary encoder with multiple calibration points |
Feb. 6, 2001 |
| 6175109 |
Encoder for providing incremental and absolute position data |
Jan. 16, 2001 |
| 6175414 |
Optical position measuring device |
Jan. 16, 2001 |
| 6172358 |
Multifunction input module |
Jan. 9, 2001 |
| 6172359 |
Position transducer |
Jan. 9, 2001 |
| 6166374 |
Molded spring gap setting mechanism for optical encoders |
Dec. 26, 2000 |
| 6147342 |
Encoding system for determining the position of a cylinder rod along a path of movement |
Nov. 14, 2000 |
| 6127676 |
Photo sensing device with means to eliminate light beam interference |
Oct. 3, 2000 |
| 6124587 |
Pointing device utilizing a photodetector array |
Sep. 26, 2000 |
| 6107621 |
Modular encoder and method of manufacturing the same |
Aug. 22, 2000 |
| 6104023 |
Reel rotation detecting device in a video cassette recorder |
Aug. 15, 2000 |
| 6100519 |
Photo-detector based calculating means having a grating wheel with integrated lenses |
Aug. 8, 2000 |
| 6093928 |
Position measuring rotary incremental optical encoder |
Jul. 25, 2000 |
| 6087654 |
Encoder apparatus and methods |
Jul. 11, 2000 |
| 6054938 |
Optical encoder |
Apr. 25, 2000 |
| 6043482 |
Scanning unit with a printed circuit for an optical position-measuring apparatus |
Mar. 28, 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 |
| 6037581 |
Device for recording a change in position at a turbine configuration |
Mar. 14, 2000 |
| 6031224 |
Position measuring system |
Feb. 29, 2000 |
| 6031223 |
Rotary encoder having a sensor activation controller |
Feb. 29, 2000 |
| 6031218 |
System and method for generating band-limited quasi-sinusoidal signals |
Feb. 29, 2000 |
| 6031222 |
Optical rotary encoder having two half-parts of a lateral surface of a rotating disk |
Feb. 29, 2000 |
| 6028304 |
Precision displacement reference system |
Feb. 22, 2000 |
| 6025588 |
Optical analog potentiometer |
Feb. 15, 2000 |
| 6020585 |
Optical rotary encoder having at least one zone plate |
Feb. 1, 2000 |
| 6015971 |
Optical sensing system using positioning holes for encoding |
Jan. 18, 2000 |
| 6002126 |
Method and structure for assembling a scanning unit in a positioning measuring instrument |
Dec. 14, 1999 |
| 5998783 |
Heat protected position transducer in an electric motor |
Dec. 7, 1999 |
| 5998784 |
Absolute position detection within 1 revolution using 3-channel incremental encoders with high resolution track |
Dec. 7, 1999 |
| 5990473 |
Apparatus and method for sensing motion in a microelectro-mechanical system |
Nov. 23, 1999 |
| 5983720 |
Reflected light rotation sensor |
Nov. 16, 1999 |
| 5984564 |
Adapter for coupling two shaft ends in a defined angular orientation |
Nov. 16, 1999 |
| 5981940 |
Angle measuring system with a clampable shaft |
Nov. 9, 1999 |
| 5973319 |
Position detecting apparatus for use with image blur correcting device having movable member |
Oct. 26, 1999 |
| 5973320 |
Optical position sensor |
Oct. 26, 1999 |
| 5973798 |
Image scanner |
Oct. 26, 1999 |
| 5969342 |
Multiplexable optical fiber displacement, strain acceleration and pressure sensors and method of operating the same |
Oct. 19, 1999 |
| 5969344 |
Photo detector for a data input device |
Oct. 19, 1999 |
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