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Class Information
Number: 250/231.14
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
Description: Subject matter wherein photocell means is provided to incrementally sense the angular position or speed of a rotatable shaft as the active external physical quantity and for generating an output proportional to the number of increments sensed by the photocell(s).
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5168268 |
Optically transmissive armature for cursor control device |
Dec. 1, 1992 |
| 5153437 |
Optical encoder having a transparent lens plate with an array of lenses |
Oct. 6, 1992 |
| 5148101 |
Method and apparatus for detecting and compensating for reverse rotation and creep of eddy current disk |
Sep. 15, 1992 |
| 5148019 |
Moving amount detecting method using a shadow picture diffraction interference pattern |
Sep. 15, 1992 |
| 5146084 |
Rotary code disk mounting structure for an optical encoder with an adhesive substance filling the circular recess of the spindle for adherence to said disk |
Sep. 8, 1992 |
| 5138564 |
Automatic encoder calibration |
Aug. 11, 1992 |
| 5132527 |
Compensation arrangement for opto-electronic reference generator |
Jul. 21, 1992 |
| 5129725 |
Method of optically detecting position of object and position detecting apparatus using the method |
Jul. 14, 1992 |
| 5128536 |
Abnormality processing circuit for an encoder |
Jul. 7, 1992 |
| 5126562 |
Encoder for setting optical path lengths of related beams |
Jun. 30, 1992 |
| 5126560 |
Graduation carrier of plastics material with a graduation structure and fresnel zone ring |
Jun. 30, 1992 |
| 5119128 |
Apparatus for generating timing pulses in an electrophotographic printing machine |
Jun. 2, 1992 |
| 5113693 |
Rotational position detecting apparatus with a signal generator |
May. 19, 1992 |
| 5113071 |
Encoder in which single light source projects dual beams onto grating |
May. 12, 1992 |
| 5107107 |
Laser optical disk position encoder with active heads |
Apr. 21, 1992 |
| 5099116 |
Optical device for measuring displacement |
Mar. 24, 1992 |
| 5097122 |
Medication infusion system having optical motion sensor to detect drive mechanism malfunction |
Mar. 17, 1992 |
| 5091643 |
Absolute position detecting method and apparatus therefor |
Feb. 25, 1992 |
| 5087812 |
Incremental encoder with direction-indicating shutter |
Feb. 11, 1992 |
| 5079418 |
Position measuring apparatus with reflection |
Jan. 7, 1992 |
| 5073710 |
Optical displacement detector including a displacement member's surface having a diffractive pattern and a holographic lens pattern |
Dec. 17, 1991 |
| 5065014 |
Rotation angle measuring with overlap area is between two optical grating axes |
Nov. 12, 1991 |
| 5065012 |
Movement detecting device |
Nov. 12, 1991 |
| 5063295 |
Slit disposition structure of fixed slit disk in pulse encoder |
Nov. 5, 1991 |
| 5057685 |
Optical rotation detector including a disk having slits with concave and convex parts and method of manufacturing |
Oct. 15, 1991 |
| 5040298 |
Protractor with electronic measuring device and digital display |
Aug. 20, 1991 |
| 5037206 |
Optical position transmitter having a movable code element with optical path difference generating structure which is greater than the coherence length of the source |
Aug. 6, 1991 |
| 5038031 |
Optical rotary encoder having large and small numerical aperture fibers |
Aug. 6, 1991 |
| 5030825 |
Rotational angle detector having grounded slit plate |
Jul. 9, 1991 |
| 5017776 |
Apparatus for and methods of optical encoding having spiral shaped light modulator |
May. 21, 1991 |
| 5004915 |
Steering angle sensor apparatus |
Apr. 2, 1991 |
| 5003171 |
Optical encoding arrangement for absolute angle measurements |
Mar. 26, 1991 |
| 5001937 |
Optically based torsion sensor |
Mar. 26, 1991 |
| 4998013 |
Optical encoder with inactive photodetectors |
Mar. 5, 1991 |
| 4994991 |
Digital synchronous detector sampling |
Feb. 19, 1991 |
| 4990767 |
Position measuring apparatus with multiple scanning locations |
Feb. 5, 1991 |
| 4991125 |
Displacement detector |
Feb. 5, 1991 |
| 4990909 |
Revolution counter using a magnetic bubble device for multi-turn absolute encoder |
Feb. 5, 1991 |
| 4987302 |
Photoelectric angle measuring apparatus whose optically projecting focal line coincides with the axis of rotation of the scale carrier |
Jan. 22, 1991 |
| 4987300 |
Optical-mechanical rotation sensing mechanism for a web-roll |
Jan. 22, 1991 |
| 4987299 |
Rotation quantity measuring method and system |
Jan. 22, 1991 |
| 4987297 |
Method and apparatus for automatically reading a mechanical fluid meter |
Jan. 22, 1991 |
| 4985624 |
Optical grating sensor and method of monitoring with a multi-period grating |
Jan. 15, 1991 |
| 4982084 |
Method for attaching pulse encoder to motor and motor attached with same |
Jan. 1, 1991 |
| 4978847 |
Pulse generator and disk sector boundary signal generator with wow and flutter compensation |
Dec. 18, 1990 |
| 4972078 |
Pulse generating circuit for detecting aperture size of camera shutter |
Nov. 20, 1990 |
| 4970387 |
Position transducer having absolute position compensation |
Nov. 13, 1990 |
| 4968882 |
Adjustable optical shaft encoder and calibration method for printers and plotters |
Nov. 6, 1990 |
| 4968145 |
Non-contacting revolving speed detecting apparatus |
Nov. 6, 1990 |
| 4965446 |
Optical interrupter system with vibration compensation |
Oct. 23, 1990 |
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