Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7730766 | Gas viscosity sensor A gas viscosity sensor comprises a signal processing circuit and a sensor element, including a gas pressure generating system and a differential pressure measuring system in fluid communication therewith, the differential pressure measuring system comprising a measu... | 06/08/2010 |
| 7334452 | Method for characterizing materials by using a mechanical resonator Methods for monitoring a fluid composition include placing a mechanical resonator in the fluid composition and oscillating the resonator. The resonator can be a tuning fork resonator having tines oscillated in opposite directions and in opposite phases. A variable f... | 02/26/2008 |
| 7073370 | Method and apparatus for characterizing materials by using a mechanical resonator A method and apparatus for measuring properties of a liquid composition includes a mechanical resonator, such as a cantilever, connected to a measurement circuit. The mechanical resonator can be covered with a coating to impart additional special detection propertie... | 07/11/2006 |
| 7011299 | Liquid vapor delivery system and method of maintaining a constant level of fluid therein In accordance with the present invention, a method and system is described for controlling the delivery of vapor from a bubbler containing a supply of chemical fluid through which a carrier gas is bubbled and from which bubbler vapors are delivered in a vapor stream... | 03/14/2006 |
| 6957565 | Method and apparatus for characterizing materials by using a mechanical resonator A method for measuring properties of a fluid that includes oscillating a tuning fork resonator in a fluid. The invention is particularly suitable for in-line monitoring of various physical and electrical properties of fluids flowing in a conduit. ... | 10/25/2005 |
| 6945089 | Mass-sensitive sensor In a mass-sensitive sensor consisting of an acoustic surface wave component on the basis of shear waves, the sensor includes a substrate with an active surface carrying two different layers, one which is a parylene layer of a thickness of between 0.2 and | 09/20/2005 |
| 6904786 | Method and apparatus for characterizing materials by using a mechanical resonator A method and apparatus for measuring properties of a liquid composition includes a mechanical resonator, such as a cantilever, connected to a measurement circuit. The mechanical resonator's response over the frequency range depends on various characteristics of the ... | 06/14/2005 |
| 6894474 | Non-intrusive plasma probe A probe for measuring plasma properties in a processing chamber, comprises a conductive rod having a front portion and a rear portion. The front portion of the conductive rod comprises a probe surface adapted to be coplanar with an interior wall of the chamber. The ... | 05/17/2005 |
| 6684683 | Method and apparatus for characterizing the barrier properties of members of combinatorial libraries A method and an apparatus for characterizing the barrier properties of an array of coatings. The method including providing a plurality of acoustic wave devices, wherein each of the plurality of acoustic wave devices comprises at least one surface, and pr... | 02/03/2004 |
| 6494079 | Method and apparatus for characterizing materials by using a mechanical resonator A method and apparatus for measuring properties of a fluid composition in a conduit includes a mechanical resonator connected to a measurement circuit. The measurement circuit provides a variable frequency input signal to the mechanical resonator, causing... | 12/17/2002 |
| 6442996 | Method and apparatus for measuring the calorific value of a gas A method and apparatus for measuring the calorific value of a gas. The apparatus includes a chamber to which a gas in question, for example natural gas, is supplied through an inlet and leaves through an outlet. The speed of sound SoS at ambient temperatu... | 09/03/2002 |
| 6401519 | Systems and methods for characterization of materials and combinatorial libraries with mechanical oscillators Methods and apparatus for screening diverse arrays of materials are provided. In one aspect, systems and methods are provided for imaging a library of materials using ultrasonic imaging techniques. In another aspect, systems and methods are provided for g... | 06/11/2002 |
| 6397661 | Remote magneto-elastic analyte, viscosity and temperature sensing apparatus and associated methods of sensing An analyte, viscosity, or temperature sensing apparatus for operative arrangement within a time-varying magnetic field, including a sensor with an outer surface that is chemically, frictionally, or thermally responsive and adhered to a base magnetostricti... | 06/04/2002 |
| 6393895 | Method and apparatus for characterizing materials by using a mechanical resonator A method and apparatus for measuring properties of a liquid composition includes a mechanical resonator, such as a thickness shear mode resonator or a tuning fork resonator, connected to a measurement circuit. The measurement circuit provides a variable f... | 05/28/2002 |
| 6370939 | Apparatus and method for measurement of mass and heat flow changes Provided are a measurement apparatus and a measurement system comprising sample and reference microresonators, such as sample and reference quartz crystal microbalances; sample and reference heat flow sensors; and a heat sink coupled thermally to the heat... | 04/16/2002 |
| 6363772 | System and method for detection of a biological condition A system and method that allows for early detection of biological conditions, such as a disease, through analysis of appropriate gaseous samples. The system and method are particularly amenable to the early screening for diseases, such as lung cancer, thr... | 04/02/2002 |
| 6336353 | Method and apparatus for characterizing materials by using a mechanical resonator A method and apparatus for measuring properties of a fluid composition includes a mechanical resonator connected to a measurement circuit. The measurement circuit provides a variable frequency input signal to the mechanical resonator, causing the mechanic... | 01/08/2002 |
| 6286361 | Method and apparatus for remotely detecting pressure, force, temperature, density, vibration, viscosity and speed of sound in a fluid An apparatus for detecting pressure in a hollow fan blade of a turbofan gas turbine engine comprises a magnetostriction transducer arranged in a sub chamber of the fan blade which is interconnected to a main chamber. A magnetic coil is arranged in the fan... | 09/11/2001 |
| 6189367 | Apparatus and method for simultaneous measurement of mass and heat flow changes Provided is a mass and heat flow measurement apparatus comprising sample and reference microresonators, such as sample and reference quartz crystal microbalances; sample and reference heat flow sensors, such as sample and reference isothermal heat conduct... | 02/20/2001 |
| 6182499 | Systems and methods for characterization of materials and combinatorial libraries with mechanical oscillators Methods and apparatus for screening diverse arrays of materials are provided. In one aspect, systems and methods are provided for imaging a library of materials using ultrasonic imaging techniques. The system includes one or more devices for exciting an e... | 02/06/2001 |
| 6184623 | Method for controlling plasma-generating high frequency power, and plasma generating apparatus A plasma generating apparatus and a method for controlling plasma-generating high frequency power capable of appropriately and easily controlling plasma density over the long term are disclosed. Measuring high frequency power is supplied to plasma through... | 02/06/2001 |
| 6125692 | Density sensor for monitoring the rate of leakage from a switchgear case with improved reliability A density sensor for monitoring a rate of leakage from the case of electrical switchgear filled with dielectric gas under pressure, the sensor comprising a fixing support mounted from the outside in the thickness of the case and communicating with the die... | 10/03/2000 |
| 5948968 | Oil mist gauge An oil mist density gauge for determining the density of oil mist flowing through an oil mist lubrication system. The oil mist density gauge comprises: a gauge body having an oil mist inlet for connecting the density gauge to the oil mist lubrication syst... | 09/07/1999 |
| 5705931 | Method for determining absolute plasma parameters In accordance with the method of the present invention, the radio frequency discharge current generated in a plasma reactor is measured in the form of analog signals at a portion of the reactor acting as an earth electrode. The analog signals are converte... | 01/06/1998 |
| 5703278 | Pressurized fluid density balance A conventional fluid density balance beam measurement instrument used for measuring fluid density at atmospheric pressure is converted for use to measure fluid density at super-atmospheric pressure. The conversion is made without modifying the structure o... | 12/30/1997 |
| 5509295 | Weather station device This invention describes a density altitude measuring device whereby the density altitude is calculated based on atmospheric inputs. The computer of the density altitude measuring device is connected to temperature, pressure and humidity sensors. The sens... | 04/23/1996 |
| 5442435 | Fluid composition sensor using reflected or refracted light monitoring A gas density sensor having a prism in contact with a fluid whose density is determined. A light source shines light into the prism. The light is reflected off prism surfaces in contact with the fluid. As the fluid density changes, the amount of light ref... | 08/15/1995 |
| 5386714 | Resonant cavity gas density sensor A density sensor comprises a cavity arranged to receive the gas whose density is to be sensed. The cavity is divided into two chambers by a flexibly mounted diaphragm. A piezoelectric excitation device at one end of the cavity is used to excite the gas in... | 02/07/1995 |
| 5343758 | Method and apparatus for measuring gas flow A method and apparatus for measuring the gaseous flow of a fluid flowing along a duct, the apparatus comprises a processing and control unit connected firstly to a flow rate measuring device which delivers data representative of the flow rate Qm of the ga... | 09/06/1994 |
| 5298783 | Combined semiconductor gas sensor The present invention relates to a combined semiconductor gas sensor, this sensor is constituted by combining two portions, each of the portions is made of a different gas sensitive material, their resistance exhibit different variation with the variation... | 03/29/1994 |
| 4928513 | Sensor A sensor having a pair of sensor units, one of which is a detecting sensor unit and the other of which is a reference sensor unit, wherein each of the units comprises a substrate with a hollow portion, a thin insulating layer with a bridge, cantilever or ... | 05/29/1990 |
| 4496287 | Sensors for detection of fluid condition, and control systems utilizing their signals A sensor utilizes the opposition of a fluid to physical displacement to provide information about the fluid itself, such as its quality as measured by its density or viscosity, or about the state of a fluid system which contains it, such as the fluid pres... | 01/29/1985 |
| 4364271 | Optical refractometer A terrestrial refractometer comprising a gastight enclosure of substantially invariant transverse section and having a linearly movable endwall which varies in position in accordance with ambient temperature and pressure, the enclosure containing a fixed ... | 12/21/1982 |
| 4299116 | Methods involving differential pressure determinations A method for measuring the density of a vapor includes continuously introducing the vapor into the inlet of a vertical zone at a rate sufficient to maintain the zone completely filled with the vapor, and measuring the pressure at the lower portion of the ... | 11/10/1981 |
| 4214474 | Density monitoring apparatus A density monitoring gauge is disclosed which modifies a Bourdon tube manometer by introducing a compensating element between the end of the Bourdon tube and the pointer actuating mechanism. The compensating element is designed to accommodate for changes ... | 07/29/1980 |
| 4136551 | Densimeter A densimeter for measuring the density of a fluid with a disk-shaped body having an axis with a horizontal component and being rotatably mounted on a shaft along the axis. An open cavity is provided in the body so that the center of buoyancy of the body i... | 01/30/1979 |
| 4000652 | Method and device for measuring the correction factor Two embodiments of a device and method are disclosed for providing a correction factor for the velocity of electromagnetic radiation in air. The devices include a pressure-responsive vessel having a predetermined quantity of gas enclosed therein and means... | 01/04/1977 |
| 3981178 | Gas density detecting apparatus There is disclosed an apparatus and process for detecting changes in the density of a gas wherein the gas to be measured is introduced into a closed casing at the rotary axis of a hollow disc wheel rotating within the casing. The disc wheel is provided wi... | 09/21/1976 |
