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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 |
| 7330326 |
Recordable disk rotational speed error correction circuit |
Feb. 12, 2008 |
| 7329859 |
Photoelectric encoder |
Feb. 12, 2008 |
| 7329858 |
Optical encoder and electronic equipment having same |
Feb. 12, 2008 |
| 7326918 |
Optical position sensor architecture for servo systems |
Feb. 5, 2008 |
| 7321113 |
Precision material-handling robot employing high-resolution, compact absolute encoder |
Jan. 22, 2008 |
| 7317183 |
High performance reflectivity optical encoder with a protrusion between lenses |
Jan. 8, 2008 |
| 7312436 |
Optical position measuring system with a detector arrangement and measuring graduation to produce partial filtering of undesired harmonics |
Dec. 25, 2007 |
| 7307789 |
Photoelectric encoder |
Dec. 11, 2007 |
| 7306239 |
Height control system and sensor therefor |
Dec. 11, 2007 |
| 7304294 |
Reflective encoder with reduced background noise |
Dec. 4, 2007 |
| 7304295 |
Method and system of detecting eccentricity and up/down movement of a code wheel of an optical encoder set |
Dec. 4, 2007 |
| 7301140 |
Scanning device for scanning a scale graduation, and position measuring system utilizing the same |
Nov. 27, 2007 |
| 7301142 |
Optical encoder photodetector array with multiple resolutions |
Nov. 27, 2007 |
| 7301141 |
Photoelectric encoder and electric device provided with the same |
Nov. 27, 2007 |
| 7291831 |
Method and apparatus for automatic modulation of photo-emitter brightness in an optical encoder |
Nov. 6, 2007 |
| 7285769 |
Optical encoder with reduced reflected light error having a light non-transparent portion with inclined surfaces |
Oct. 23, 2007 |
| 7282699 |
Optical encoder for improved detection of the absolute position of an origin point |
Oct. 16, 2007 |
| 7280049 |
Encoder runout error correction circuit |
Oct. 9, 2007 |
| 7279674 |
Optical encoder module |
Oct. 9, 2007 |
| 7276687 |
Optical encoder and electronic equipment using the same |
Oct. 2, 2007 |
| 7276686 |
Method and device for detecting the opening angle of the shutter of an adjustable rotating shutter in a film camera |
Oct. 2, 2007 |
| 7271920 |
Position-measuring device |
Sep. 18, 2007 |
| 7265338 |
Photoelectric encoder using an incoherent semiconductor light source |
Sep. 4, 2007 |
| 7265336 |
Encoder utilizing a reflective cylindrical surface |
Sep. 4, 2007 |
| 7265337 |
Sensing apparatus |
Sep. 4, 2007 |
| 7256391 |
Encoder for detecting a position of a detection target |
Aug. 14, 2007 |
| 7253395 |
Absolute encoder employing concatenated, multi-bit, interpolated sub-encoders |
Aug. 7, 2007 |
| 7244927 |
Control panel for a motor vehicle fascia, having at least one optically controlled rotary adjustment knob |
Jul. 17, 2007 |
| 7244928 |
Optical encoder |
Jul. 17, 2007 |
| 7238932 |
Optical position sensing device |
Jul. 3, 2007 |
| 7238931 |
Displacement detection apparatus |
Jul. 3, 2007 |
| 7235776 |
Method and device for regulating a light source of a position-measuring unit |
Jun. 26, 2007 |
| 7230230 |
Apparatus for adjusting a signal and prohibiting adjustment of the signal based on a position of a movable member |
Jun. 12, 2007 |
| 7230726 |
Scanning unit for a position measuring instrument for optical scanning of a object measuring graduation |
Jun. 12, 2007 |
| 7227124 |
Illumination configuration for imaging-type optical encoders |
Jun. 5, 2007 |
| 7227125 |
Encoder device |
Jun. 5, 2007 |
| 7223963 |
Optical encoder |
May. 29, 2007 |
| 7220960 |
Optical encoder having a light source scale and photodetector and an optical lens module using the optical encoder |
May. 22, 2007 |
| 7220958 |
Optical displacement sensor and external force detecting device |
May. 22, 2007 |
| 7217916 |
Optical encoder |
May. 15, 2007 |
| 7214928 |
Scanning unit for an optical position measuring device |
May. 8, 2007 |
| 7214929 |
Force-feedback input device |
May. 8, 2007 |
| 7214930 |
Pulse generator |
May. 8, 2007 |
| 7214931 |
Encoder for detecting movement of an object |
May. 8, 2007 |
| 7211786 |
Reflective linear encoder having controlled detector to code strip distance |
May. 1, 2007 |
| 7211782 |
Precision measuring gauges with optical fiber output channels |
May. 1, 2007 |
| 7211451 |
Process for producing a component module |
May. 1, 2007 |
| 7209226 |
Gravity sensor |
Apr. 24, 2007 |
| 7205530 |
Encoder device and apparatus for gapping and centering an encoder device |
Apr. 17, 2007 |
| 7202468 |
Power transfer device with contactless optical encoder and color reflective surface |
Apr. 10, 2007 |
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