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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 |
| 5701007 |
Method of aligning a light pathway for an optics apparatus |
Dec. 23, 1997 |
| 5671043 |
Optical position detector for determining the angular position of a rotatable element |
Sep. 23, 1997 |
| 5670779 |
Electro-optical shaft angle transducer having a rotatable refractive optical element |
Sep. 23, 1997 |
| 5665965 |
Encoder apparatus and methods employing optical and graphical programming |
Sep. 9, 1997 |
| 5659389 |
Non-intrusive throttle body calibration |
Aug. 19, 1997 |
| 5625183 |
Rotary mirror scanner unit having optical angular displacement sensor |
Apr. 29, 1997 |
| 5617022 |
Fiberoptic velocity transducer including dielectric coating for filtering and velocity determination |
Apr. 1, 1997 |
| 5602388 |
Absolute and directional encoder using optical disk |
Feb. 11, 1997 |
| 5594434 |
Angular sensing system |
Jan. 14, 1997 |
| 5569906 |
Photoelectric control structure for linear transmission devices |
Oct. 29, 1996 |
| 5555776 |
Cam integrated with a rotation sensor |
Sep. 17, 1996 |
| 5557101 |
Reel table revolution detector for use in a video cassette recorder |
Sep. 17, 1996 |
| 5557440 |
Noise-insensitive optoencoding techniques with compensation for device variations |
Sep. 17, 1996 |
| 5510781 |
Ultrasonic rotary shaft position encoder |
Apr. 23, 1996 |
| 5502380 |
Analog weighted binary absolute position encoder including an array of sense resistors each having material responsive to FWX and nonresponsive to flux |
Mar. 26, 1996 |
| 5483058 |
High angular sensitivity, absolute rotary encoding device with polygonal mirror and stand-alone diffraction gratings |
Jan. 9, 1996 |
| 5479010 |
Photoelectric encoder having a plane mirror disposed parallel to the optical axis of a concave mirror |
Dec. 26, 1995 |
| 5471054 |
Encoder for providing calibrated measurement capability of rotation or linear movement of an object, label medium and an optical identification system |
Nov. 28, 1995 |
| 5449900 |
Apparatus for detecting the angular position of a shaft using laser light backscattered from a shaft surface |
Sep. 12, 1995 |
| 5442281 |
Method and apparatus for deriving power consumption information from the angular motion of a rotating disk in a watt hour meter |
Aug. 15, 1995 |
| 5432339 |
Apparatus for and method of measuring geometric, positional and kinematic parameters of a rotating device having a plurality of interval markers |
Jul. 11, 1995 |
| 5428445 |
Interferential position measuring device |
Jun. 27, 1995 |
| 5428217 |
Annular photodiode for use in an optical rotary encoder |
Jun. 27, 1995 |
| 5424535 |
Optical angle sensor using polarization techniques |
Jun. 13, 1995 |
| 5420413 |
Actuator with an optical position sensor using a variable magnetic field |
May. 30, 1995 |
| 5407294 |
Encoder mounting device |
Apr. 18, 1995 |
| 5406075 |
Externally-mounted utility meter reading arrangement |
Apr. 11, 1995 |
| 5389780 |
Optical torque sensor utilizing single polarizing area filters and mechanical amplifier |
Feb. 14, 1995 |
| 5384457 |
Low power optoelectronic device and method |
Jan. 24, 1995 |
| 5382792 |
Angle sensor with hermetic sealing and magnetic coupling |
Jan. 17, 1995 |
| 5367157 |
Device for rapidly performing a sedimentation-rate test |
Nov. 22, 1994 |
| 5349183 |
Diffraction grating rotary speed sensor having a circumferentially variable pitch diffraction grating |
Sep. 20, 1994 |
| 5345076 |
Optically trimmed sensor for reducing influence of differential node losses |
Sep. 6, 1994 |
| 5331153 |
Gravity orientation device having an encoder and a rotatable shaft mounted in a cylindrical casing |
Jul. 19, 1994 |
| 5331399 |
Method for measuring and determining a rotation angle of a rotating object |
Jul. 19, 1994 |
| 5329114 |
Actuator with an optical position sensor using linear attenuators |
Jul. 12, 1994 |
| 5329121 |
Rotary encoding device with polygonal reflector and centroid detection |
Jul. 12, 1994 |
| 5324934 |
Fiberoptic encoder for linear motors and the like |
Jun. 28, 1994 |
| 5319196 |
Optical rotation sensor |
Jun. 7, 1994 |
| 5311029 |
Magnetic speed sensor with optical conversion |
May. 10, 1994 |
| 5288993 |
Cursor pointing device utilizing a photodetector array with target ball having randomly distributed speckles |
Feb. 22, 1994 |
| 5279038 |
Device for measuring the angular position of a component which is rotatably displaceable relative to a fixed component, especially of a telescope mounting in relation to its supporting structu |
Jan. 18, 1994 |
| 5276323 |
Optical movement detector detecting a position of an optical gravity center |
Jan. 4, 1994 |
| 5272335 |
Eccentricity-compensated position detecting apparatus having an identifying transparent slit |
Dec. 21, 1993 |
| 5252824 |
Analog transmitter of position and direction of rotation having a signal amplitude varies on each change of state of sensors |
Oct. 12, 1993 |
| 5241306 |
System and method for introducing meter sensor hysteresis |
Aug. 31, 1993 |
| 5237390 |
Method and apparatus for measurement of angular displacement |
Aug. 17, 1993 |
| 5235177 |
Angular position sensor using a polarized disc with coded tracks |
Aug. 10, 1993 |
| 5235180 |
Rotary motor having an angular position transducer and galvanometer scanning system employing such motor |
Aug. 10, 1993 |
| 5231284 |
Method and apparatus using laser light for detecting the rotational position of a servomotor and the like |
Jul. 27, 1993 |
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