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Class Information
Number: 361/283.2
Name: Electricity: electrical systems and devices > Electrostatic capacitors > Variable > Responsive to external condition > Pressure > By displacement of stylus or lever
Description: Subject matter in which the pressure condition is sensed by the change of position of a mechanical element or linkage which transmits force to the capacitor.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8638541 Input device Jan. 28, 2014
RE41521 Variable capacity condenser and pointer Aug. 17, 2010
7721412 Method of making an electrochemical sensor May. 25, 2010
7493821 Micromachined acoustic transducer and method of operating the same Feb. 24, 2009
7400488 Variable capacitance membrane actuator for wide band tuning of microstrip resonators and filters Jul. 15, 2008
6973706 Method of making a transcutaneous electrochemical sensor Dec. 13, 2005
6853369 Variable capacity condenser and pointer Feb. 8, 2005
6684711 Three-phase excitation circuit for compensated capacitor industrial process control transmitters Feb. 3, 2004
6683780 Capacitive displacement sensor Jan. 27, 2004
6658938 Electret transducer Dec. 9, 2003
6622368 Method of manufacturing a transducer having a diaphragm with a predetermined tension Sep. 23, 2003
6441449 MEMS variable capacitor with stabilized electrostatic drive and method therefor Aug. 27, 2002
6373682 Electrostatically controlled variable capacitor Apr. 16, 2002
6147855 Variable capacitor Nov. 14, 2000
6051853 Semiconductor pressure sensor including reference capacitor on the same substrate Apr. 18, 2000
6026677 Apparatus for microindentation hardness testing and surface imaging incorporating a multi-plate capacitor system Feb. 22, 2000
5869751 Multi-dimensional capacitive transducer Feb. 9, 1999
5707077 Airbag system using three-dimensional acceleration sensor Jan. 13, 1998
5661235 Multi-dimensional capacitive transducer Aug. 26, 1997
5604313 Varying apparent mass accelerometer Feb. 18, 1997
5598356 Displacement converting device and method for measuring pressure differences using same Jan. 28, 1997
5578528 Method of fabrication glass diaphragm on silicon macrostructure Nov. 26, 1996
5576483 Capacitive transducer with electrostatic actuation Nov. 19, 1996
5542295 Apparatus to minimize stiction in micromachined structures Aug. 6, 1996
5446616 Electrode structure and method for anodically-bonded capacitive sensors Aug. 29, 1995
5441300 Three-dimensional acceleration sensor and airbag using the same Aug. 15, 1995
5381300 Capacitive micro-sensor with a low stray capacity and manufacturing method Jan. 10, 1995
5323118 Hinged displacement sensor Jun. 21, 1994
5233213 Silicon-mass angular acceleration sensor Aug. 3, 1993
5230250 Capacitor and pressure transducer Jul. 27, 1993
5207767 Capacitor and pressure transducer May. 4, 1993
5206785 Variable capacitor and position indicator employing variable capacitor Apr. 27, 1993
5168419 Capacitor and pressure transducer Dec. 1, 1992
5024099 Pressure transducer with flow-through measurement capability Jun. 18, 1991
5006952 Capacitive transducers Apr. 9, 1991
4933807 Method of and apparatus for improved capacitive displacement and pressure sensing including for electronic musical instruments Jun. 12, 1990
4875368 Pressure sensor system Oct. 24, 1989
4873870 Micro displacement force transducer Oct. 17, 1989
4870536 Micro displacement force transducer Sep. 26, 1989
4719538 Force responsive capacitive transducer Jan. 12, 1988
4579001 Pressure relief valve with pressure indicating means Apr. 1, 1986
4541283 Pressure sensor Sep. 17, 1985
4458292 Multiple capacitor transducer Jul. 3, 1984
4437138 Force sensing means and method of producing such sensing means Mar. 13, 1984
4392383 Distance-frequency transducer Jul. 12, 1983
4386453 Method for manufacturing variable capacitance pressure transducers Jun. 7, 1983
4386386 Capacitor type sensor for detecting displacement or load May. 31, 1983
4357834 Displacement converter Nov. 9, 1982
4341275 Measuring apparatus with electromagnetic force compensation and capacitive position sensor Jul. 27, 1982
4320667 Load transducer Mar. 23, 1982

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