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| Number | Title | Issue Date |
| 8121800 | Capacitative node measurement in a capacitative matrix pressure inducer A method and system for measuring the distribution of pressure forces over a selected area includes a sensor having an array of pressure sensing capacitance nodes formed by intersecting rows and columns, where measured capacitance of a node is compared to a fixed va... | 02/21/2012 |
| 7729870 | Methods for detecting oil deterioration and oil level Methods for detecting oil conditions including a top level of an oil in an oil system which is reduced to a top level of a predetermined threshold amount of the oil, a normal oil deterioration which occurs in the absence of water having a confirmed actual remaining ... | 06/01/2010 |
| 7523006 | Measurement sensor assembly and method for measuring the quality of a fluid The aim of the invention is to provide a simple and reliable method of measuring the quality of a fluid (2), in particular an oil or fat. This is achieved by a dielectric measurement in conjunction with a temperature measurement, which are carried out in situ... | 04/21/2009 |
| 7415366 | Electronic field device with a sensor unit for capacitive level measurement in a container A field device electronics with a sensor unit for capacitive fill level measurements in a container, wherein the field device electronics is connected over appropriate signal paths with the sensor unit, wherein the field device electronics produces a voltage signal ... | 08/19/2008 |
| 7403862 | Method for operating a process-measuring device The process measuring device comprises a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused... | 07/22/2008 |
| 7350367 | Environmental control system fluid sensing system and method A system for monitoring a fluid in an environmental control system includes a mechanical resonator positioned for contacting a thermal change fluid. In some embodiments, the mechanical resonator is positioned in a passage for containing the thermal change fluid. Sui... | 04/01/2008 |
| 7284427 | Self-calibrating liquid level transmitter The present disclosure generally relates to a capacitance sensing apparatus equipped with self-calibrating capacity and method of use thereof. The disclosure contemplates the determination using a secondary means of precise fluid levels according to five possible em... | 10/23/2007 |
| 7237203 | Process and device for visual display of information in motor vehicles In a process and device for visual display of information in motor vehicles with an electronically controllable display, the display is controlled in such a manner that at least two sets of information, having an interrelated effect, are displayed as a comparison by... | 06/26/2007 |
| 7225081 | Application specific integrated circuitry for controlling analysis of a fluid A circuit chip is disclosed. The circuit chip includes analog-to-digital processing circuitry that is capable of interfacing with a sensor and host electronics. The analog-to-digital processing circuitry includes a frequency generator configured for providing stimul... | 05/29/2007 |
| 7210341 | Fuel quantity estimate system A device for calculating a quantity of fuel in a fuel tank for a fuel cell vehicle is provided. The device includes a first quantity determining system that provides a first quantity value representing said quantity of fuel in said fuel tank based on a physical cond... | 05/01/2007 |
| 7170303 | Fuel sensor A sensor (20) includes a single capacitor (30) that operates in two different modes to obtain capacitance and conductance information when a mixture flows between the electrodes (32, 34) of the capacitor. Two different oscillators (180, 182 | 01/30/2007 |
| 7167773 | Process and apparatus for improving and controlling the curing of natural and synthetic moldable compounds A process for curing a moldable compound under a plurality of curing conditions by: (1) obtaining time dependent data streams of dielectric or impedance values from a plurality of sensors distributed within a curing mold, wherein the moldable compound is a dialectri... | 01/23/2007 |
| 7150190 | Method and apparatus for capacitively determining the uppermost level of a liquid in a container A liquid level sensor confirms actual physical contact between a probe and a liquid by verifying that any change in capacitance of the sensor is constant over a given time period and thereby is not caused by spurious electrical disturbances or other measuring irregu... | 12/19/2006 |
| 7148682 | Apparatus for sensing the proximity of a vehicle to an object An apparatus for sensing the proximity of a first vehicle (79) to an object such as a second vehicle (82). The apparatus includes an array of sensor assemblies (80) mounted on the first vehicle (79). The sensor assemblies (80) incl... | 12/12/2006 |
| 7107838 | Apparatus and methods for monitoring water consumption and filter usage Apparatus and methods for employing electrical properties of water to indicate the level of filtered water in a filtered water container. The container is fitted with a hopper that holds unfiltered water. The hopper is fitted at its base with a removable and replace... | 09/19/2006 |
| 7079958 | Method for operating a process-measuring device The process measuring device includes a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused ... | 07/18/2006 |
| 7076464 | Apparatus, and associated method, for distributing revenue generated pursuant to distribution of content Apparatus, and an associated method, for facilitating distribution of revenue generated pursuant to distribution of content, such as recorded music files or other entertainment files, to content consumers. Identification is made by an identifier of includable distri... | 07/11/2006 |
| 7072877 | Fuzzy inference method and machine, and an image production method and system An image production method has steps of: detecting one or more descriptive regions exclusive of a background portion of a manuscript; calculating an image characteristic value of said descriptive region; ... | 07/04/2006 |
| 7020564 | Logical volume administration method, the service using the method and the memory medium storing the service To provide a logical volume administration method capable of reducing a cost of using a storage, a logical volume is constructed by a steady area corresponding to a task of steadily allocating a disk area and a temporary area corresponding to a task of allocating no... | 03/28/2006 |
| 7017409 | Proximity sensor for level sensing A field effect sensor is adapted for use in sensing level of fluids and powders. The sensor uses elongated, parallel electrodes disposed on or within the side wall of a tank. The longitudinal axes of the electrodes are parallel to the surface of fluid or powder cont... | 03/28/2006 |
| 6929018 | Underground storage tank metering system in a service station environment A meter coupled in close proximity to an underground storage tank fuel pipe that delivers fuel from the underground storage tank to fuel dispensers in a service station environment. The meter measures the total amount of fuel drawn from the underground storage tank.... | 08/16/2005 |
| 6920411 | Method for configuring an operational characteristic of a proximity sensor A proximity sensor has a resonant circuit which when stimulated by a pulse produces a signal with decaying oscillations. The number of such oscillations above a signal threshold varies in relation to the distance between a metal object and the proximity sensor. The ... | 07/19/2005 |
| 6913228 | Aircraft with active center of gravity control A supersonic aircraft comprises a wing, a fuselage, a plurality of fuel tanks contained within the wing and/or fuselage, and a fuel transfer system communicatively coupled to the plurality of fuel tanks and capable of transferring fuel among the plurality of fuel ta... | 07/05/2005 |
| 6853928 | Two-wire electromagnetic flowmeter In a two-wire electromagnetic flowmeter, an exciting coil generates a magnetic field in a direction perpendicular to the flowing direction of a fluid that flows through a measurement tube. A flow measuring output circuit adjusts an output current that flows to a pai... | 02/08/2005 |
| 6714876 | Control system A control system for a gas sensor element capable of lessening the effect of variations in sensor properties among gas sensor elements as well as the effect of environmental factors, such as temperature and humidity, to thereby accurately detect variation in the con... | 03/30/2004 |
| 6666086 | Automatic boiler level controller An improved boiler water-level controller. According to one aspect of the present invention, a positive blowdown signal is presented to indicate to the operator that the alarm probe is in steam; performing blowdown until this indicator turns on helps ensu... | 12/23/2003 |
| 6553812 | Combined oil quality and viscosity sensing system A combined oil quality and fuel contamination sensing system includes a capacitive dielectric sensor and pressure sensing arrangements for measuring the dielectric constant of the oil and the pressure of the oil, respectively, with the oil pressure being ... | 04/29/2003 |
| 6546795 | Wireless liquid level sensing system and method A wireless liquid sensing system includes a beverage container and a table top for holding the container. Embedded in the walls and bottom of the container are two electrically conductive plates coupled to a transponder wire coil. A reader radiates an RF ... | 04/15/2003 |
| 6438500 | Method and device for detecting the absence of a product in a reservoir Detecting presence or absence of product in a reservoir by transmitting a signal affected by the product. The signal is detected from among other signals with which it is subsequently received by discrimination and delivery of an output signal whose level... | 08/20/2002 |
| 6338025 | Data processing system and method to estimate power in mixed dynamic/static CMOS designs An apparatus and method for determining power consumption in logic devices including mixed static and dynamic logic blocks is implemented. Input logical signals are tagged as having dynamical behavior or static behavior, and the power consumption of the l... | 01/08/2002 |
| 6293144 | Method and device for monitoring the consumption of a product, for example a printing ink, using a low-pass filter In order to monitor the consumption of a normally electrically conductive product contained in a storage chamber of a reservoir made of electrically non-conductive material, the storage chamber is disposed in a capacitive arrangement and a measurement pro... | 09/25/2001 |
| 6278381 | Fault condition protective device for aircraft fuel gauging system A fault protective device (48) for limiting the maximum current and voltage applicable to electronic components and wiring (26, 30) located in the fuel tank (10) of an aircraft. Particularly, a fuel gauging system circuit (18) extends from a generator (20... | 08/21/2001 |
| 6171252 | Pressure sensor with increased sensitivity for use with an implantable medical device An apparatus and method for obtaining pressure data using a body implantable pressure sensor includes a measurement capacitor which is responsive to pressure changes of a body fluid. Non-constant, multiple current source charging of the measurement capaci... | 01/09/2001 |
| 6101452 | Method and apparatus for dispensing fluids A method and apparatus for dispensing fluids in response to a user request for a specified amount of the fluid. A microprocessor opens and closes a fluid port for predetermined amounts of time to control the amount of fluid dispensed. The microprocessor m... | 08/08/2000 |
| 5726908 | Liquid quantity sensor and method A sensor apparatus is described that detects and indicates the quantity of cryogenic liquid in a Dewar container, independent of the spatial orientation and the physical motions acting on the container.... | 03/10/1998 |
| 5406843 | Digital liquid level sensing apparatus A digital liquid level sensing apparatus for detecting variations in the dielectric of a substance being sensed. The apparatus includes a capacitive element array including a plurality of individual (i.e., segmented) input plates positioned along an axis ... | 04/18/1995 |
| 5155482 | Aircraft fluid vessel testing An electrical test set especially suited for use in correlating the fill sensor's output indication for a pressure vessel with a known vessel fill condition. The vessel may be the hydrazine fuel container for an aircraft such as the U.S. Air Force F-16 fi... | 10/13/1992 |
| 5121632 | Point level switch A point level sensor senses capacitance of a material in a vessel to determine level. The capacitance is input to a comparator which is part of an oscillator circuit developing a square wave signal having a period corresponding to capacitance. A microproc... | 06/16/1992 |
| 5051921 | Method and apparatus for detecting liquid composition and actual liquid level A liquid level and composition sensor includes a first interdigitated capacitor mounted substantially vertically in a tank, and a second interdigitated capacitor mounted substantially horizontally in and near the bottom of the tank. An electronic processo... | 09/24/1991 |
| 4918619 | Multiplexed junction probe for fuel gaging system and system containing same A true mass fuel gaging system for aircraft utilizing multiplexing of tank unit measurements in or adjacent a fuel tank for improved accuracy and fault isolation. The system provides dual equipment channels for redundancy throughout all data processing po... | 04/17/1990 |
