| |
 |
|
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 |
| 5965879 |
Method and apparatus for ultra-high-sensitivity, incremental and absolute optical encoding |
Oct. 12, 1999 |
| 5955727 |
Optical encoder having a shade layer made from photosensitive material |
Sep. 21, 1999 |
| 5949067 |
Code plate of optical rotary encoder having tilted light-detection patterns |
Sep. 7, 1999 |
| 5949066 |
System and method for creating and utilizing a sinusoidal based pattern sensor to achieve precise positioning of a movable element |
Sep. 7, 1999 |
| 5939712 |
Absolute position detection within 1 revolution using 3-channel incremental encoders with high resolution index track |
Aug. 17, 1999 |
| 5936236 |
Method for generating a synthetic reference signal for comparison with scanning signals of a position measuring device |
Aug. 10, 1999 |
| 5932874 |
Measurement and control system for controlling system functions as a function of rotational parameters of a rotating device |
Aug. 3, 1999 |
| 5929431 |
Optical tracker system for determining the position of a rotating body |
Jul. 27, 1999 |
| 5923032 |
Interaligned component optical encoder with integral housing component locating studs and shelf |
Jul. 13, 1999 |
| 5903000 |
Method for determining the position of a rotating shaft |
May. 11, 1999 |
| 5900930 |
Angle sensor using a multi-pixel optical device |
May. 4, 1999 |
| 5900626 |
Non-contact type mode sensing device for use in an electric appliance |
May. 4, 1999 |
| 5886350 |
Multi-axis wheel transducer with angular position detector |
Mar. 23, 1999 |
| 5883384 |
Rotational displacement information detection apparatus |
Mar. 16, 1999 |
| 5874731 |
Ambient light filter |
Feb. 23, 1999 |
| 5859425 |
Encoder having first and second housing portions and guide means |
Jan. 12, 1999 |
| 5859426 |
Device for gauging relative rotational displacement and/or speed between the races of a rolling contact bearing |
Jan. 12, 1999 |
| 5856668 |
Photoelectric position measuring encoder having scale formed of electrically non-conductive material |
Jan. 5, 1999 |
| 5854483 |
Method and system for reading encoded optical signals and forming square wave signals therefrom |
Dec. 29, 1998 |
| 5854482 |
Pointing device utilizing a photodector array |
Dec. 29, 1998 |
| 5844673 |
Axial led position detector for determining the angular position of a rotatable element |
Dec. 1, 1998 |
| 5841133 |
Optical displacement detecting apparatus having gratings and a light receiving chip |
Nov. 24, 1998 |
| 5841132 |
Optical displacement sensor and torque sensor employing relatively movable slit patterns |
Nov. 24, 1998 |
| 5828060 |
Apparatus for determining the position of a rotating shaft |
Oct. 27, 1998 |
| 5825665 |
Bicycle inclinometer |
Oct. 20, 1998 |
| 5821531 |
Dual sensor encoder for detecting forward/reverse rotation having light modulating patterns with a predetermined phase different |
Oct. 13, 1998 |
| 5818221 |
Fiberoptic velocity transducer including dielectric coating for filtering and velocity determination |
Oct. 6, 1998 |
| 5818039 |
Incremental optical positioning sensor |
Oct. 6, 1998 |
| 5818038 |
Steering wheel angular position sensor |
Oct. 6, 1998 |
| 5796098 |
Sensor for rotational velocity and rotational acceleration |
Aug. 18, 1998 |
| 5783816 |
Measuring device for a hay baler |
Jul. 21, 1998 |
| 5780849 |
Apparatus for detecting objects to be transferred for use in semiconductor device fabrication apparatus |
Jul. 14, 1998 |
| 5780848 |
System and method for indicating an angular position of an object using a level detection device |
Jul. 14, 1998 |
| 5771594 |
Angular encoder |
Jun. 30, 1998 |
| 5773820 |
Rotary position sensor with reference and grey scales |
Jun. 30, 1998 |
| 5758427 |
Angular-position measuring device having a mounting element for torsion-proof mounting of a stator to a stationary object |
Jun. 2, 1998 |
| 5754341 |
Phase grating, its fabricating method, optical encoder, motor using the optical encoder, and robot using the motor |
May. 19, 1998 |
| 5750983 |
Meter sensor light tamper detector |
May. 12, 1998 |
| 5734159 |
Rotation sensor using a radiation emitter and detector and a duty cycle feedback loop |
Mar. 31, 1998 |
| 5734160 |
Automobile steering angle sensor with a humidity moving member and a spiral shape resistance body |
Mar. 31, 1998 |
| 5729009 |
Method for generating quasi-sinusoidal signals |
Mar. 17, 1998 |
| 5729006 |
Reel rotation detecting device in a video cassette recorder |
Mar. 17, 1998 |
| 5729007 |
Position detecting apparatus and position detecting method using the same |
Mar. 17, 1998 |
| 5724130 |
Technique for the measurement and calibration of angular position |
Mar. 3, 1998 |
| 5723858 |
Position encoder with fault indicator |
Mar. 3, 1998 |
| 5714811 |
Rotor position detecting apparatus for a brushless motor |
Feb. 3, 1998 |
| 5712478 |
Apparatus for measuring position of ball joint |
Jan. 27, 1998 |
| 5708496 |
Modular optical shaft encoder having a slide gap centering mechanism and method of use |
Jan. 13, 1998 |
| 5705810 |
Laser optical torquemeter |
Jan. 6, 1998 |
| 5703356 |
Pointing device utilizing a photodetector array |
Dec. 30, 1997 |
|
|
|
