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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 |
| 4977316 |
Encoder disc having a track formed by two regions of different radii |
Dec. 11, 1990 |
| 4973838 |
Pulsed laser beam deviation apparatus |
Nov. 27, 1990 |
| 4970380 |
Method for optical code pattern enhancement and generation |
Nov. 13, 1990 |
| 4965445 |
Rotation angle detector with outwardly extending radial projections |
Oct. 23, 1990 |
| 4963732 |
Structure for connecting a rotary detecting device to a rotary shaft |
Oct. 16, 1990 |
| 4958072 |
Remote fiber optic angular-orientation sensor using phase detection of two orthogonal oscillating polarization vectors |
Sep. 18, 1990 |
| 4955180 |
Method and apparatus for feeding and tightening a band in strapping machine |
Sep. 11, 1990 |
| 4952946 |
Scanning beam position detecting apparatus for use in electronic printer |
Aug. 28, 1990 |
| 4950890 |
Method and apparatus for correcting position errors using writable encoders |
Aug. 21, 1990 |
| 4947071 |
High speed DC motor |
Aug. 7, 1990 |
| 4942295 |
Apparatus for angle measurement with installation means |
Jul. 17, 1990 |
| 4935622 |
Angle measuring device using clamping means |
Jun. 19, 1990 |
| 4933636 |
Self-aligning tachometer and method of manufacturing same |
Jun. 12, 1990 |
| 4931634 |
Optical position sensor using Kerr effect and a magnetic scale |
Jun. 5, 1990 |
| 4931635 |
Optical position sensor using Faraday effect element and magnetic scale |
Jun. 5, 1990 |
| 4928009 |
Deflection-insensitive optical rotary encoder |
May. 22, 1990 |
| 4920905 |
Detector for use on sewing machines |
May. 1, 1990 |
| 4920259 |
Apparatus for producing a phase insensitive index pulse for motion encoders |
Apr. 24, 1990 |
| 4912322 |
Optical type displacement detecting device |
Mar. 27, 1990 |
| 4912320 |
Optical type encoder including diffraction grating for producing interference fringes that are processed to measure displacement |
Mar. 27, 1990 |
| 4908510 |
Optical fiber coupled resolver having a reference signal |
Mar. 13, 1990 |
| 4906846 |
Displacement detector for detecting an amount of displacement of an object to be measured |
Mar. 6, 1990 |
| 4902885 |
Photoelectric conversion type rotational position detector |
Feb. 20, 1990 |
| 4899048 |
Focused optical beam encoder of position |
Feb. 6, 1990 |
| 4894533 |
Optical rotary encoder |
Jan. 16, 1990 |
| 4893007 |
Rotary machine with a measuring device for the angle of rotation |
Jan. 9, 1990 |
| 4891513 |
Photosensor block having an adjustable mounting structure to permit fine positioning of the photosensor block included in the photosensor block |
Jan. 2, 1990 |
| 4888481 |
Aligning and protective cover for a motor |
Dec. 19, 1989 |
| 4879555 |
Absolute linear position detection device |
Nov. 7, 1989 |
| 4870272 |
Transducer adjustment apparatus for shaft encoder |
Sep. 26, 1989 |
| 4864125 |
Extra magnetic field positioning apparatus |
Sep. 5, 1989 |
| 4859845 |
Optical rotary encoder with sub-code patterns |
Aug. 22, 1989 |
| 4851666 |
Optical flow meter |
Jul. 25, 1989 |
| 4849621 |
Rotational-position detecting apparatus with two shaped photovoltaic surfaces |
Jul. 18, 1989 |
| 4843232 |
Optic switch and speed sensor |
Jun. 27, 1989 |
| 4835545 |
Modulating laser intensity in a laser printer proportionately to the velocity of the photoconductive media |
May. 30, 1989 |
| 4835382 |
Optical code reading device |
May. 30, 1989 |
| 4835384 |
Device and method for determining displacement using colored transparent spheres |
May. 30, 1989 |
| 4827124 |
Electro optical transducer utilizing aligned light conductors |
May. 2, 1989 |
| 4827122 |
Rotation angle detector |
May. 2, 1989 |
| 4820918 |
Optical encoder including transparent substrates having formed indicators therein |
Apr. 11, 1989 |
| 4819051 |
Compensated rotary position encoder |
Apr. 4, 1989 |
| 4810892 |
Unit and method utilizing a data medium for determining the relative position between two parts |
Mar. 7, 1989 |
| 4809857 |
Drum rotation indicator |
Mar. 7, 1989 |
| 4808817 |
Rotational acceleration detector with microdot coding |
Feb. 28, 1989 |
| 4806751 |
Code wheel for a reflective type optical rotary encoder |
Feb. 21, 1989 |
| 4795902 |
Optical master controller having plural tracks each with plural emitter detector pairs |
Jan. 3, 1989 |
| 4794250 |
Self-gapping optical encoder |
Dec. 27, 1988 |
| 4792677 |
System for use with a utility meter for recording time of energy use |
Dec. 20, 1988 |
| 4788422 |
High resolution rotary encoder having appositely rotating disks |
Nov. 29, 1988 |
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