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Class Information
Number: 324/236
Name: Electricity: measuring and testing > Magnetic > With means to create magnetic field to test material > Electrically energized nonforce type sensor > Oscillator type
Description: Subject matter wherein the sensor is part of a frequency generator whereby the material-modified magnetic field is sensed by the sensor to control the frequency or the amplitude of the electrical wave generated by the frequency generator.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7576534 |
System and method to forecast the electrical conductivity of anodes for aluminum production before baking |
Aug. 18, 2009 |
| 7545691 |
Measuring circuit for qualifying a memory located on a semiconductor device |
Jun. 9, 2009 |
| 7511585 |
Automatic page detector |
Mar. 31, 2009 |
| 7498804 |
Resonance current sensing |
Mar. 3, 2009 |
| 7372255 |
Detection of the instantaneous position of a linearly reciprocating member using high frequency injection |
May. 13, 2008 |
| 7336069 |
Eddy current sensor and sensor coil for the same |
Feb. 26, 2008 |
| 7298261 |
Proximity sensor |
Nov. 20, 2007 |
| 7265542 |
Process and device for contactless measurement of rotational speed |
Sep. 4, 2007 |
| 7241630 |
Paramagnetic particle detection |
Jul. 10, 2007 |
| 7239133 |
Methods and systems for controlling the temperature stability of an inductor |
Jul. 3, 2007 |
| 7113876 |
Technique and electronic circuitry for quantifying a transient signal using threshold-crossing counting to track signal amplitude |
Sep. 26, 2006 |
| 6984994 |
Position and electromagnetic field sensor |
Jan. 10, 2006 |
| 6948388 |
Wireless remote sensor |
Sep. 27, 2005 |
| 6885277 |
Externally adjustable impedance transformer |
Apr. 26, 2005 |
| 6643909 |
Method of making a proximity probe |
Nov. 11, 2003 |
| 6600313 |
Device for reading an elongate magnetic data carrier |
Jul. 29, 2003 |
| 6556090 |
Oscillator circuit for a validator |
Apr. 29, 2003 |
| 6541964 |
Method and apparatus for determining hydride content in a measurement object |
Apr. 1, 2003 |
| 6476604 |
Method and apparatus for identifying high metal content on a semiconductor surface |
Nov. 5, 2002 |
| 6456067 |
Inductive product sensor for a refreshment center |
Sep. 24, 2002 |
| 6437581 |
Two wire sensor device |
Aug. 20, 2002 |
| 6356077 |
Method of and device for determining a time-dependent gradient of a shock wave in a ferromagnetic element subjected to a percussion load |
Mar. 12, 2002 |
| 6345228 |
Road vehicle sensing apparatus and signal processing apparatus therefor |
Feb. 5, 2002 |
| 6326790 |
Ground piercing metal detector having range, bearing and metal-type discrimination |
Dec. 4, 2001 |
| 6304083 |
Magnetic field sensor with colossal magneto-resistive material contained within the coil of an oscillator |
Oct. 16, 2001 |
| 6281680 |
Method and apparatus for distinguishing synthetic diamonds from natural diamonds |
Aug. 28, 2001 |
| 6255810 |
Inductive angle sensor having coupled oscillators with similar inductive response |
Jul. 3, 2001 |
| 6246229 |
Method and apparatus for controlling the temperature stability of an inductor using a magnetically coupled metallic object |
Jun. 12, 2001 |
| 6237418 |
Method and apparatus for detecting misapplied caps on containers |
May. 29, 2001 |
| 6215365 |
Inductive proximity sensor oscillator |
Apr. 10, 2001 |
| 6211672 |
Human appendage mounted metal detector |
Apr. 3, 2001 |
| 6208134 |
Interference-tolerant proximity sensor system having a resonance-tracking impedance analyzer |
Mar. 27, 2001 |
| 6191580 |
Configurable inductive proximity detector to detect ferrous or non-ferrous metal objects |
Feb. 20, 2001 |
| 6163149 |
Device for determining the dissolution time of medicaments in pressed form, like tablets, pills or capsules |
Dec. 19, 2000 |
| 6145646 |
Device for checking the authenticity of coins, tokens or other flat metal objects |
Nov. 14, 2000 |
| 6087743 |
Position control system for use with micromechanical actuators |
Jul. 11, 2000 |
| 6057683 |
Induction sensor having conductive concentrator with measuring gap |
May. 2, 2000 |
| 6040694 |
Method and device for determining the thickness of an electrically conductive layer |
Mar. 21, 2000 |
| 6032110 |
Lateral positioning detecting apparatus for moving body |
Feb. 29, 2000 |
| 5994897 |
Frequency optimizing metal detector |
Nov. 30, 1999 |
| 5986549 |
Position and movement reasonant sensor |
Nov. 16, 1999 |
| 5977766 |
Method and device for inductive measurement of physical parameters of an object of metallic material with error compensation |
Nov. 2, 1999 |
| 5963030 |
Pipe inspection apparatus and process |
Oct. 5, 1999 |
| 5959451 |
Metal detector with vibrating tactile indicator mounted within a compact housing |
Sep. 28, 1999 |
| 5949293 |
Integrated circuit for measuring the distance |
Sep. 7, 1999 |
| 5929635 |
Digital oscillator and supply circuit for an eddy current probe |
Jul. 27, 1999 |
| 5844502 |
Temperature-compensated object sensing device and method therefor |
Dec. 1, 1998 |
| 5801530 |
Proximity sensor having a non-ferrous metal shield for enhanced sensing range |
Sep. 1, 1998 |
| 5767672 |
Inductive proximity sensor for detecting magnetic and non-magnetic metallic objects |
Jun. 16, 1998 |
| 5764050 |
Method for the reliable determination of the distance of the conductive reaction track from a functional surface of a magnetic levitation vehicle moving relative to the reaction track and a se |
Jun. 9, 1998 |
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