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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7710128 | Method and apparatus for controlling the sensitivity and value of a capacitive humidity sensor A humidity sensor apparatus and method of forming the same. A substrate can be provided upon which a plurality of humidity sensing components are disposed to form a humidity sensor thereof. Each humidity sensing component generally includes an associated particular ... | 05/04/2010 |
| 7474105 | Soil moisture sensor systems and methods Soil moisture sensor systems and methods are disclosed. An exemplary soil moisture sensor system includes a sensor configured to receive soil between parallel plates. A capacitive measurement circuit is operatively associated with the parallel sensor. A processor re... | 01/06/2009 |
| 7408364 | Sensor for measuring moisture and salinity A sensor for measuring the moisture and salinity of a material is disclosed herein. The sensor preferably includes a soil moisture circuit, a soil salinity circuit and a probe structure. The soil moisture circuit includes a high frequency oscillator, a voltage meter... | 08/05/2008 |
| 7322243 | Acoustic wave etch rate sensor system An acoustic wave sensor system for monitoring the etch rate or etch ability of a selective material has an acoustic wave sensing device having a piezoelectric substrate and at least one electrode coupled to the substrate for generating a propagating acoustic wave an... | 01/29/2008 |
| 7316198 | Humidity indicator A humidity indicator includes a first film (F1) covering a surface of a humidity-determining plate (B), and a second film (F2) covering a back of the humidity-determining plate (B). A flat air layer (Au) is formed at least between the first film (F1... | 01/08/2008 |
| 7311816 | Device for determining the residual liquid content of solids cakes in centrifuges A device for determining the residual liquid content of solids cakes in a centrifuge basket. The device includes two electrodes protruding through a wall of the basket and into the solids cake; a conductivity or capacitance measuring device (13) measuring the... | 12/25/2007 |
| 7293450 | Oil quality sensor structure for permanent applications An oil quality sensor system comprise an acoustic wave viscosity and an etch rate sensor. The etch rate sensor system includes a piezoelectric substrate and one or more sensing layers configured upon the piezoelectric substrate. A layer of gold is generally configur... | 11/13/2007 |
| 7287431 | Wireless oil filter sensor A wireless oil filter sensing system includes an oil filter and a sensing mechanism that is connectable to the oil filter. The sensing mechanism includes one or more acoustic wave sensing elements and at least one antenna that communicate with the acoustic wave sens... | 10/30/2007 |
| 7278186 | Ultra low frequency moisture sensor An apparatus for measuring a moisture content value within a volume. A frequency generator generates at least one source signal at frequencies of no more than about one kilohertz. Probes are disposed with surfaces in physical contact with the volume, where no direct... | 10/09/2007 |
| 7267009 | Multiple-mode acoustic wave sensor A multiple-mode acoustic wave sensor apparatus includes an acoustic wave device comprising a piezoelectric substrate and at least one electrode on the substrate. When such sensor is used in a wireless configuration, a plurality of antennas can be configured on the s... | 09/11/2007 |
| 7245985 | Process and apparatus for improving and controlling the vulcanization of natural and synthetic rubber compounds A process for curing a natural or synthetic rubber compound under a plurality of curing conditions by: (1) obtaining time dependent data streams of dielectric or impedance values from a non-bridged impedance sensing circuit and a capacitor having the rubber compound... | 07/17/2007 |
| 7231815 | Relative humidity probe for concrete A probe for determining the relative humidity and temperature of a substance such as a concrete floor. The probe is adapted to be inserted into a hole in the substance being tested. The probe has a head portion and a tail portion. A display is provided on the head p... | 06/19/2007 |
| 7219536 | System and method to determine oil quality utilizing a single multi-function surface acoustic wave sensor A method and system for detecting oil quality. The quality of engine oil can be determined utilizing an acoustic wave sensor to obtain viscosity and corrosivity data associated with the engine oil. The acoustic wave sensor is coated with a material that selectively ... | 05/22/2007 |
| 7212955 | Consumer product status monitoring Data associated with at least one characteristic associated with the viability of a product is monitored. The data associated with the at least one characteristic is analyzed, and based on the analyzing, at least one future viability state condition of the product i... | 05/01/2007 |
| 7210333 | Humidity sensor and method of using the humidity sensor A humidity-sensitive porous layer (13) of a humidity-sensitive element section (3) of a humidity sensor (1) is formed of a crystalline phase oxide grains such as Al2O3—SnO2—TiO2 and of a glass phas... | 05/01/2007 |
| 7204128 | Engine wear and oil quality sensor A viscosity and corrosivity sensor apparatus includes a substrate upon which one or more electrodes are configured. The electrode(s) are exposed to a liquid, such as automotive oil. An oscillator can be connected to the electrode, wherein the oscillator assists in p... | 04/17/2007 |
| 7205779 | Apparatus and method for monitoring and determining the moisture content in elastomer materials An apparatus and method for determining and monitoring the moisture content of an elastomer material used as a closure or stopper for containers holding lyophilized pharmaceutical products, comprising a parallel capacitance circuit formed by supplying a source of AC... | 04/17/2007 |
| 7193290 | Semiconductor component and a method for producing the same A semiconductor component, such as a humidity sensor, which has a semiconductor substrate, such as, for example, made of silicon, a first electrode and a second electrode and at least one first layer that is accessible for a medium acting from the outside on the sem... | 03/20/2007 |
| 7181978 | Method, apparatus and system for forecasting strength of cementitious material A method of forecasting strength of a chemically active material while hardening is disclosed. The chemically active material is characterized by at least one physical parameter. The method comprises: (a) measuring the at least one physical parameter over a predeter... | 02/27/2007 |
| 7176700 | Moisture sensor device and self-diagnosing method therefor A moisture sensor device includes a sensor portion having a capacitance that is varied in accordance with surrounding humidity, a signal processor for processing a detection signal of the sensor portion and outputting the signal corresponding to the humidity, a heat... | 02/13/2007 |
| 7170302 | Capacitive soil moisture sensor A capacitive soil moisture sensor that is easy to install, does not require complex calibration, can sense moisture at a particular depth, can accommodate soils of different composition, does not alter soil densities, provides fast response to changes in moisture an... | 01/30/2007 |
| 7154241 | Wiper control method and wiper control device There are provided a wiper control method and a wiper control device in which unnecessary wiping operation is not performed. When a fixed amount of water passing through a detection area 4, the water being carried by the wiping operation of a wiper 5 | 12/26/2006 |
| 7151381 | Grain moisture sensor A grain moisture meter has a test cell for containing a sample of the particulate material to be tested. A single oscillator includes a variable frequency tuned circuit including the test cell as a capacitor, a calibrated variable standard capacitor, a calibrating c... | 12/19/2006 |
| 7145350 | Process and a circuit arrangement for evaluating a measuring capacitance A process is disclosed for evaluating a measuring device comprising a capacitor (CM), with stages for charging the capacitor (CM) over an initial charging period (tk1, tk2) and for determining the capacitance charge as an initial measured value (tml). ... | 12/05/2006 |
| 7136155 | Apparatus for measuring oil oxidation using fluorescent light reflected from oil An apparatus for measuring oil oxidation is capable of being mounted to mechanical devices for detecting power of fluorescent light reflected from oil in real time as an indication of the oil oxidation. A plurality of first optical fibers are connected to a light-em... | 11/14/2006 |
| 7129713 | Capacitive moisture sensor A moisture sensing apparatus includes an oscillator for supplying an AC signal to a driven ring of a sensor having a pad inside the ring, and a ground plate around the ring. An amplifier forms part of a temperature-compensated, precision rectifier, and is connected ... | 10/31/2006 |
| 7104502 | Ice detector for improved ice detection at near freezing condition An ice detector for providing a signal indicating ice formation includes a probe protruding into an airflow. The probe extends into the airflow from a strut. The strut has one or more features which allow the probe to accrete ice at a higher temperature than would c... | 09/12/2006 |
| 7087019 | Apparatus for testing skin moisture An apparatus for testing skin moisture including a casing, a fixed base at the front end of the casing, at least one through hole on the fixed base, a hollow cylindrical metal electrode with a closed end passing through the through hole, and an electrically conducti... | 08/08/2006 |
| 7077004 | Method and device for measuring humidity A method and a device for measuring humidity may be suitable for determining the relative humidity in the high-humidity range. The device includes a sensor device, as well as a circuit connected to the same. The sensor device includes a capacitive humidity-sensor el... | 07/18/2006 |
| 7068050 | Moisture and density detector (MDD) A Moisture and Density Detector (MDD) provides a method and apparatus to determine the moisture content and/or density, as well as presence and location of anomalies, and/or wood type of any dielectric material for various purposes. This device is very useful in det... | 06/27/2006 |
| 7063270 | Moisture sensor sprinkler control systems Irrigation systems, moisture sensors and related methods having a sensor embedded in the ground to sense moisture and help control watering. The sensor is responsive to capacitance changes from ground moisture variations. The sensor uses spaced insulated electrodes ... | 06/20/2006 |
| 7051574 | Flow cell humidity sensor system A system for monitoring water concentration in gaseous sample is disclosed. It is readily applicable in the synthesis of biopolymer arrays/microarrays involving the use of water-sensitive reagents. A flow cell is provided in which a capacitance sensor is placed sepa... | 05/30/2006 |
| 7043970 | Method for monitoring wood-drying kiln state The method utilizes a known good set of moisture content data for wood dried in a kiln under set conditions to estimate parameters for a Lognormal distribution which approximates the moisture content data for those conditions. The method creates control charts which... | 05/16/2006 |
| 7043402 | On-line oil condition sensor system for rotating and reciprocating machinery An on-line sensing system and method for monitoring in real-time thermal-oxidative breakdown, water contamination, and/or fuel dilution conditions in operational engine lubricating oils. The method of the invention includes an electrochemical impedance analysis tech... | 05/09/2006 |
| 7037112 | Virtual arm for measurement of humidity, temperature, and water vapor transmission rate in materials A device is provided for simulating a human skin microclimate and for measuring conditions such as temperature and humidity in the simulated microclimate. The microclimate is formed, for example, with fluids, gases and/or heat in a chamber of the device or between a... | 05/02/2006 |
| 7036558 | Method and system for evaluating local compactness of a granular material An evaluation method in which a capacitive sensor is placed in a region of a container, into which a granular material is fed so as to contact the sensor, and the variation in the impedance of the sensor caused by feeding in the material is evaluated. The method is ... | 05/02/2006 |
| 7030631 | Method and apparatus for monitoring and determining the moisture content of a substance in a container A method and apparatus for monitoring and determining the moisture content of a sample substance inside a closed container. The apparatus includes a parallel capacitance circuit formed by a source of AC voltage supplied to a reference container and a sample containe... | 04/18/2006 |
| 7027864 | Defibrillation system and method designed for rapid attachment A defibrillator having a pair of electrodes for delivering an impedance-compensated defibrillation shock and a method thereof is provided. The defibrillator can be deployed rapidly and effectively with no or minimal clothing and hair removal. To achieve this, one el... | 04/11/2006 |
| 7021124 | Method and apparatus for detecting leaks in a fluid cooling system One embodiment of the present method and apparatus for detecting leaks in a fluid cooling system enables a user to rapidly detect fluid leaks in the vicinity of a microprocessor chip or other delicate item. In one embodiment, the invention comprises a detector and a... | 04/04/2006 |
| 7017392 | System for monitoring dilution The system for monitoring dilution has a commodity being stored separately from a first fluid. The commodity has a predetermined distinguishing parameter (DP2) and the first fluid has a predetermined distinguishing parameter (DP1) being different from ... | 03/28/2006 |
