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Class Information
Number: 324/458
Name: Electricity: measuring and testing > Electrostatic field > Using modulation-type electrometer
Description: Subject matter wherein the electrostatic phenomenon being monitored is modulated by movement of one of the elements of the electometer to thereby generate an alternating current signal proportional to the phenomenon being measured.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7612569 |
Oscillating device, electric potential measuring device, light deflecting device, and image forming apparatus |
Nov. 3, 2009 |
| 7598746 |
Surface voltmeter and surface voltage measurement method |
Oct. 6, 2009 |
| 7583086 |
Potential sensor |
Sep. 1, 2009 |
| 7579843 |
Methods and apparatus for analyzing partial discharge in electrical machinery |
Aug. 25, 2009 |
| 7576546 |
Electric potential measuring device and image forming apparatus |
Aug. 18, 2009 |
| 7554331 |
Electric potential measuring device and image forming apparatus |
Jun. 30, 2009 |
| 7548066 |
Potential measuring device and image forming apparatus using the same |
Jun. 16, 2009 |
| 7489135 |
Electric potential measuring instrument and image forming apparatus |
Feb. 10, 2009 |
| 7460803 |
Electric potential measuring device using oscillating device, image forming apparatus, and electric potential measuring method |
Dec. 2, 2008 |
| 7443325 |
Sigma-delta modulator |
Oct. 28, 2008 |
| 7439746 |
Electrostatic voltmeter |
Oct. 21, 2008 |
| 7423435 |
Method and apparatus for measuring grammage |
Sep. 9, 2008 |
| 7382137 |
Potential measuring apparatus |
Jun. 3, 2008 |
| 7372278 |
Electric potential measuring apparatus electrostatic capacitance measuring apparatus, electric potential measuring method, electrostatic capacitance measuring method, and image forming apparat |
May. 13, 2008 |
| 7315268 |
Integrator current matching |
Jan. 1, 2008 |
| 7274193 |
Micromechanical potential sensor |
Sep. 25, 2007 |
| 7265554 |
Electric potential measuring device and image forming apparatus |
Sep. 4, 2007 |
| RE39803 |
Non vibrating capacitance probe for wear monitoring |
Sep. 4, 2007 |
| 7256572 |
Electric-field meter having current compensation |
Aug. 14, 2007 |
| 7242882 |
Electric potential measuring device using oscillating device, image forming apparatus, and electric potential measuring method |
Jul. 10, 2007 |
| 7230431 |
Integrating electrometer amplifying circuit |
Jun. 12, 2007 |
| 7212007 |
Electric potential sensor, and image forming apparatus |
May. 1, 2007 |
| 7196524 |
Sensor plug-in head, particularly for a potentiometric sensor and potentiometric sensor comprising a sensor plug-in head |
Mar. 27, 2007 |
| 7149442 |
Electric potential sensor |
Dec. 12, 2006 |
| 7109698 |
Electric-field meter having current compensation |
Sep. 19, 2006 |
| 7109877 |
Fault monitoring apparatus and method |
Sep. 19, 2006 |
| 7098644 |
Non-contact high-voltage electrometer architecture with low-voltage feedback |
Aug. 29, 2006 |
| 7021775 |
Modular keypad assembly |
Apr. 4, 2006 |
| 6965239 |
Electric potential sensor, and image forming apparatus |
Nov. 15, 2005 |
| 6828794 |
Electrostatic particle measurement |
Dec. 7, 2004 |
| 6806717 |
Spacing compensating electrostatic voltmeter |
Oct. 19, 2004 |
| 6762607 |
Electrostatic discharges and transient signals monitoring system and method |
Jul. 13, 2004 |
| 6657434 |
Surface potential detection apparatus |
Dec. 2, 2003 |
| 6653826 |
Alternating voltage detector |
Nov. 25, 2003 |
| 6628122 |
Electrostatic discharge testing apparatus |
Sep. 30, 2003 |
| 6628121 |
Tools for measuring electrometer dispenser response |
Sep. 30, 2003 |
| 6614235 |
Apparatus and method for detection and measurement of environmental parameters |
Sep. 2, 2003 |
| 6611134 |
Open type electricity meter |
Aug. 26, 2003 |
| 6608483 |
Quadrature differential charge commutation sensor enabling wide bandwith field mills and other electrostatic field measuring devices |
Aug. 19, 2003 |
| 6600323 |
Sensor for non-contacting electrostatic detector |
Jul. 29, 2003 |
| 6593567 |
Ion mobility spectrometer having extended linear dynamic range |
Jul. 15, 2003 |
| 6573725 |
Sensor for non-contacting electrostatic detector |
Jun. 3, 2003 |
| 6563319 |
Electrostatic discharges and transient signals monitoring system and method |
May. 13, 2003 |
| 6541981 |
Automation of transmission line pulse testing of electrostatic discharge devices |
Apr. 1, 2003 |
| 6504375 |
Electrostatic voltmeter modulators and methods of making same |
Jan. 7, 2003 |
| 6504376 |
Automatic modulation control for ESV modulators |
Jan. 7, 2003 |
| 6489776 |
Non-contact mechanical resonance method for determining the near surface carrier mobility in conductors |
Dec. 3, 2002 |
| 6489777 |
System for purging electrostatic voltmeter modulator assembly |
Dec. 3, 2002 |
| 6466027 |
Apparatus for measuring electric charge |
Oct. 15, 2002 |
| 6462552 |
Apparatus for measuring electric charge |
Oct. 8, 2002 |
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