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Patent No. 6681419

Forehead support apparatus 

A forehead support apparatus for resting a standing users forehead against a wall above a bathroom commode or urinal or beneath a showerhead.

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Class 324/655 - Including a tuned or resonant circuit


Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter including measuring or testing a circuit
No. of patents: 69
Last issue date: 12/06/2011


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NumberTitleIssue Date
8072227Method for manufacturing tactile-sensitive material utilizing microcoils
Provided is a material for tactile sensor, which is easy to be formed, and in which the shape, size and orientation of coils dispersed in the medium are sufficiently controlled. The tactile-sensitive material includes a medium and a plurality of micro coils disperse...
12/06/2011
7868628Tactile sensor utilizing microcoils with spiral shape
Provided is a material for tactile sensor, which is easy to be formed, and in which the shape, size and orientation of coils dispersed in the medium are sufficiently controlled. The tactile-sensitive material comprises a medium and a plurality of micro coils dispers...
01/11/2011
7274189Sensor and method
An apparatus includes a first circuit, a second circuit, and a capacitor. The first circuit includes a sense element. The capacitor couples the first circuit to the second circuit. The first feedback path couples the second circuit to the first circuit. And the seco...
09/25/2007
7205775Sensing apparatus and method
There is described an inductive sensor for sensing a parameter such as position. The inductive sensor includes: receive aerial which is electro-magnetically coupled to a magnetic field generator via a resonant circuit with the electromagnetic coupling varying in dep...
04/17/2007
7202673Tuned MMIC probe pads
A microwave integrated circuit chip having microwave transmission line coupled to an input of a microwave circuitry: The microwave transmission line comprises: a substrate; a strip conductor disposed on a first surface of the substrate, such strip conductor having a...
04/10/2007
7168150Method of making a resonant frequency tag
A method of making a resonant frequency tag which resonates at a predetermined frequency. The method involves providing a first conductive pattern having an inductive element and a first land and a second conductive pattern having a second land and a third land whic...
01/30/2007
7142113Method and apparatus to detect an external source
A method and apparatus to detect an external source are described. ...
11/28/2006
7076998Tire measuring device with a modulated backscatter transponder self-sufficient in terms of energy
A tire measuring device has a converter for converting the ambient energy to an alternating value, and a reflector that can be modulated by the alternating value. ...
07/18/2006
7076858Method for controlling resonant tag frequency
A method of making a resonant frequency tag having a predetermined frequency comprises forming a first conductive pattern comprising an inductive element and a first land having a first end connected to an inductive element end, and a second end spaced a predetermin...
07/18/2006
7064562Temperature compensation method for soot sensor
Certain characteristics of Diesel engine lubrication oil are determined. A sensor formed as a capacitor is immersed in the oil. An inductor is in series with the sensor, and a high frequency voltage with a varying frequency is applied to the resonance circuit formed...
06/20/2006
7030626High-frequency oscillation type proximity sensor
A high-frequency oscillation proximity sensor with an improved detection sensitivity uses, as a detection coil 11, a two-thread coil formed of substantively two coil conductors joined together at their first ends to form a joint connection end and twisted tog...
04/18/2006
7015703Radio frequency Langmuir probe
A Langmuir probe for measuring characteristics of a plasma driven by radio frequency (RF) power comprises an elongated conductor 10 having an exposed tip 1 for insertion into an RF plasma and an outer end 3 for connection to external measuring c...
03/21/2006
7005842Probe cartridge assembly and multi-probe assembly
A probe cartridge assembly and a multi-probe assembly (10) including a mounting plate having a plurality of the probe cartridge assemblies mounted on the mounting plate. The probe cartridge assembly generally includes a mounting member, a probe insulator (...
02/28/2006
7005930Synchronously coupled oscillator
A phase synchronous multiple LC tank oscillator includes a plurality of oscillator stages that are configured to oscillate synchronously. The phase of each of the plurality of oscillator stages is substantially the same and the plurality of oscillators are inductive...
02/28/2006
6993812Method of manufacturing the piezoelectric transducer
Inner individual electrodes are formed at intervals on a piezoelectric ceramic layer so as to correspond in a one-to-one relationship with ink channels, and an inner common electrode are formed on another piezoelectric ceramic layer. The required number of piezoelec...
02/07/2006
6995573Process for determining the position of an influencing element with an inductive position sensor
A process for determining the position of an influencing element, using an inductive position sensor, several coils, a capacitor, an amplifier element, at least one changeover switch and an evaluation unit, a selected one of the coils and the capacitor forming a tun...
02/07/2006
6984994Position and electromagnetic field sensor
A position and electromagnetic field sensor is provided. The sensor relies upon an oscillator such as a Robinson marginal oscillator to generate an rf or microwave electromagnetic field. As an inhomogeneously shaped object, such as a metallic toothed wheel, for exam...
01/10/2006
6972579Wafer integrated plasma probe assembly array
A wafer integrated plasma diagnostic apparatus for semiconductor wafer processing system having a multiplicity of plasma probe assemblies arranged on a wafer in a planar array fashion such that one plasma probe assembly is in the center and eight more plasma probe a...
12/06/2005
6972686Radiated field detector
A testing device is operative to sense or monitor a radiated field emitted by an igniter for heating equipment such as an oil burner and to indicate the detection corresponding to a normal operating state of the igniter. ...
12/06/2005
6925701Method of making a series of resonant frequency tags
A method of making a resonant frequency tag which resonates at a predetermined frequency. The method involves providing a first conductive pattern having an inductive element and a first land and a second conductive pattern having a second land and a third land whic...
08/09/2005
6911829Inductive signature measurement circuit
An apparatus for measuring the inductance of a wire-loop with noise-cancellation, auto-calibration and wireless communication features, or detector circuit. The apparatus measures the effective change in inductance induced in a wire-loop as a vehicle passes over the...
06/28/2005
6847215Electronic circuit for detecting a change relative to a quiescent condition
An electronic circuit for detecting a change with respect to a quiescent condition, which includes an oscillation circuit including a first and a second oscillator circuit, each oscillator circuit includes an oscillator input terminal and an oscillator output termin...
01/25/2005
6836128Inductive flow sensor for determining the position of flowing elements and method of determining the position of flow
An inductive path sensor for determining the position of the influencing element (2) is described, with several coils (4) arranged in succession, with one capacitor (5), with an amplifier element (6), with at least one changeover switch (...
12/28/2004
6819120Non-contact surface conductivity measurement probe
A non-contact probe for determining the conductivity of coating materials is disclosed. The probe includes a free running oscillator operating at a selected frequency, a sensor made up of an LC circuit, a detector for detecting a change in the LC circuit in response...
11/16/2004
6759855Device for monitoring and forecasting the probability of inductive proximity sensor failure
In a device for the monitoring and the prognosis of the failure probability of inductive proximity sensors (1) for the monitoring of the position of movable switch rails or rail components, in which the proximity sensor (1) has at least one coil (5
07/06/2004
6653841Device and method for carrying out a contactless measurement of the conductivity of a liquid situated in a flow channel
The invention relates to a device and method for carrying out a contactless measurement of the conductivity of a liquid situated in a flow channel, and to the use of said device and method. According to the invention, the invention provides that a toroida...
11/25/2003
6570377Systems and method for determining proximity sensor characteristics
A system and method for determining characteristics of a proximity sensor. According to a preferred embodiment, the admittance of a proximity sensor/cable assembly is measured at two frequencies. Assumptions about sensor characteristics and cable characte...
05/27/2003
6549371Automatic rewind detection for magnetic tape cassettes
An apparatus and method for determining the position of magnetic tape within a magnetic tape cassette to ascertain whether the magnetic tape is in a rewound position within the cassette is provided. In a first aspect of the present invention, the magnetic...
04/15/2003
6345228Road vehicle sensing apparatus and signal processing apparatus therefor
A road vehicle sensor provides an output signal having a magnitude which varies with time through a plurality of values as a vehicle passes the sensor. Signal processing apparatus monitors the timing of sensor signals generated from sensors in adjacent la...
02/05/2002
6278379System, method, and sensors for sensing physical properties
Several sensors are provided for determining one of a number of physical roperties including pressure, temperature, chemical species, and other physical conditions. In general, the sensors feature a resonant circuit with an inductor coil which is electrom...
08/21/2001
6215365Inductive proximity sensor oscillator
An inductive proximity sensor oscillator having a differential comparator in combination with a negative feedback network and a positive feedback network connected to the comparator. The positive feedback network determines the frequency and amplitude of ...
04/10/2001
6111520System and method for the wireless sensing of physical properties
Several sensors are provided for determining one of a number of physical properties including pressure, temperature, and other physical conditions. In general, the sensors feature a resonant circuit with an inductor coil which is electromagnetically coupl...
08/29/2000
6072313In-situ monitoring and control of conductive films by detecting changes in induced eddy currents
The change in thickness of a film on an underlying body such as a semiconductor substrate is monitored in situ by inducing a current in the film, and as the thickness of the film changes (either increase or decrease), the changes in the current are detect...
06/06/2000
5898298Inductor/capacitor-based measuring system for a moving body
A measuring system measures forces, deformations, and movements. The measuring system comprises at least one LC-circuit, at least one power supply for generating a voltage and a current in the LC-circuits, whereby the frequency, the amplitude, and the pha...
04/27/1999
5734338Vehicle detector with automatic sensitivity adjustment
The period Tnv of an oscillator signal is measured. A number Nmeas of cycles of the oscillator signal is determined based upon the measured oscillator period Tnv and upon a desired minimum change in inductance ƊL (sensiti...
03/31/1998
5694045Apparatus for determining part of object, and object, part of which can be automatically determined
An object has a plurality of parts, wherein each part of the plurality of parts can face a predetermined direction. A plurality of resonant circuits are mounted in different predetermined positions of the object, and have different resonance frequencies. ...
12/02/1997
5652510Linear magnetic shaft position sensor monitoring changes in the inductance in a coil
A shaft position detection device for detecting a certain position on a shaft comprising: a movable shaft including a detection portion to be detected, a characteristic of which is different from the other portions; a position detection coil to which the ...
07/29/1997
5623209Diagnostic system for capacitive discharge ignition system
In a capacitive discharge ignition system there being a first circuit detecting the voltage across the storage capacitor marking the onset of discharge of the storage capacitor, a second circuit detecting the voltage across the storage capacitor marking t...
04/22/1997
5587663Method for measuring the inductance of each resonator of a coupled-dual resonator crystal
The present invention discloses a method for obtaining frequency parameters to determine the resonator inductances of a crystal. Under this method, a plurality of frequencies are applied to a first electrode. This application is performed once while the s...
12/24/1996
5510720Device for detecting attempts at fraud on an apparatus for reading and writing on a chip card
A device for detecting attempts at fraud by connection of an electric feed line (13) to an apparatus for reading and writing on a chip card (3) essentially comprises a resonance unit (6) coupled to a contacting element (2) of the apparatus, and a measurin...
04/23/1996
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