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Class Information
Number: 250/231.1
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Light valve (e.g., iris diaphragm) > Actuated by dynamic external physical quantity
Description: Subject matter in which the means in the optical path between the light source and the photocell for varying the amount of light which reaches the photocell is actuated by an external mechanical force.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7456385 |
System and method for detecting an end of and/or a beginning of a stroke |
Nov. 25, 2008 |
| 7436380 |
Electronic Apparatus with level detecting function |
Oct. 14, 2008 |
| 7402791 |
Switch having a ball member |
Jul. 22, 2008 |
| 7348542 |
System and method for detecting an intensity of light |
Mar. 25, 2008 |
| 7349591 |
Pressure compensated optical accelerometer, optical inclinometer and seismic sensor system |
Mar. 25, 2008 |
| 7332707 |
Aisle width sensor for mobile storage systems |
Feb. 19, 2008 |
| 7323649 |
Jerking-initiated switch |
Jan. 29, 2008 |
| 7304291 |
Information detecting device, sheet material processing apparatus equipped with information detecting device, and signal output device |
Dec. 4, 2007 |
| 7294823 |
System and method for detecting a position of a movable element |
Nov. 13, 2007 |
| 7266261 |
Fiber optics differential pressure transducer |
Sep. 4, 2007 |
| 7180053 |
Apparatus, a system and method for determining a position within a cylinder |
Feb. 20, 2007 |
| 7161138 |
Electrical product and tilting control device thereof |
Jan. 9, 2007 |
| 7151247 |
Mobile measurement system of photoenvironment |
Dec. 19, 2006 |
| 7129468 |
Electronic assembly for the production of wireless string instruments |
Oct. 31, 2006 |
| 7129470 |
Optical sensor using a long period grating suitable for dynamic interrogation |
Oct. 31, 2006 |
| 7123354 |
Optical position measuring device |
Oct. 17, 2006 |
| 7109469 |
Composite operation type input device for carrying out pressing and rotation operations with common operation unit |
Sep. 19, 2006 |
| 7084616 |
Method and device for measuring an electrical voltage |
Aug. 1, 2006 |
| 7078676 |
Displacement sensor apparatus |
Jul. 18, 2006 |
| 7045768 |
Displacement/quantity of light converter |
May. 16, 2006 |
| 7031031 |
Position measuring system |
Apr. 18, 2006 |
| 7019280 |
Apparatus for detecting the tilt of a light reflector relative to the optical axis of input light |
Mar. 28, 2006 |
| 7019667 |
System and method for accurate reading of rotating disk |
Mar. 28, 2006 |
| 6955085 |
Optical accelerometer or displacement device using a flexure system |
Oct. 18, 2005 |
| 6952009 |
Apparatus, a system and a method for monitoring a position of a shaft element in a cylinder and an apparatus, a system and a method for cleaning of the shaft element |
Oct. 4, 2005 |
| 6924475 |
Optical transducers and method of making same |
Aug. 2, 2005 |
| 6921894 |
Fiber optic micro accelerometer |
Jul. 26, 2005 |
| 6917035 |
Covering for the apertures of reaction receptacles constituted in microtitration plates |
Jul. 12, 2005 |
| 6909084 |
Optical tactile sensor having a transparent elastic tactile portion |
Jun. 21, 2005 |
| 6906310 |
Level |
Jun. 14, 2005 |
| 6858835 |
Electronic tilt switch and integrated light module |
Feb. 22, 2005 |
| 6847030 |
Scanning device for a position-measuring system for scanning a scale graduation |
Jan. 25, 2005 |
| 6800841 |
Tilt switch |
Oct. 5, 2004 |
| 6769307 |
Method and system for processing measurement signals to obtain a value for a physical parameter |
Aug. 3, 2004 |
| 6759647 |
Projection encoder |
Jul. 6, 2004 |
| 6758086 |
Automotive cylinder pressure sensors |
Jul. 6, 2004 |
| 6753519 |
Arrangement for the detection of relative movements or relative positions of two objects |
Jun. 22, 2004 |
| 6750444 |
Apparatus and method for measuring vehicle speed and/or acceleration |
Jun. 15, 2004 |
| 6740867 |
Vibration switch |
May. 25, 2004 |
| 6723979 |
Roll arming sensor |
Apr. 20, 2004 |
| 6710322 |
Device for detecting the position of a selector lever |
Mar. 23, 2004 |
| 6690457 |
Optical inclination sensor |
Feb. 10, 2004 |
| 6664534 |
Tilt sensing device and method for its operation |
Dec. 16, 2003 |
| 6614016 |
Method for optically determining the position of a movement element and sensor for implementing the method |
Sep. 2, 2003 |
| 6608297 |
Scanner document speed encoder |
Aug. 19, 2003 |
| 6603105 |
Smart optical microphone/sensor |
Aug. 5, 2003 |
| 6568273 |
Pressure sensor |
May. 27, 2003 |
| 6560804 |
System and methods for mattress control in relation to patient distance |
May. 13, 2003 |
| 6556946 |
Linear position sensor |
Apr. 29, 2003 |
| 6525307 |
Integrated optical interrogation of micro-structures |
Feb. 25, 2003 |
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