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| Number | Title | Issue Date |
| 7349813 | Fault tolerant power system architecture for fluid flow measurement systems To provide a fault-tolerant architecture to supply electrical operating power in fluid flow measurement applications, apparatus and associated systems, computer program products, and methods include an intelligent power module with redundant and electrically indepen... | 03/25/2008 |
| 7249486 | Method for monitoring a sensor The present invention concerns a method of monitoring a sensor for sensing the flow speed of a medium. The invention further concerns an apparatus for carrying out that method. In order to be able to monitor the sensor, without providing redundant sensors, the flow ... | 07/31/2007 |
| 7218223 | Magnetic field sensing for tamper identification The present technology involves a method and apparatus for detecting and reporting magnetic fields in the proximity of a utility meter as an approach to determining tampering of such meter. The sensitivity level of the magnetic field sensors may be adjustable allowi... | 05/15/2007 |
| 7155956 | Medium, method and system for proving a turbine meter A novel medium, method and system for proving a turbine meter for use with natural gas. The novel test medium is a gas having the following characteristics: (a) Density>2×Density of Natural Gas; (b) Dynamic Viscosity | 01/02/2007 |
| 7083544 | Method and apparatus for monitoring a transmission part A control device for electric motors and a method for monitoring the serviceability of a transmission part arranged for transmission of torque between an electric motor and a load during operation. The method comprises the steps of initiating at least one test seque... | 08/01/2006 |
| 6910364 | Diagnosis method for detecting ageing symptoms in a steam turbine A diagnosis method is for detecting ageing symptoms in a steam turbine. The efficiency and the steam flow rate of an aged steam turbine is compared to the efficiency and the steam flow rate of a relatively new steam turbine. The efficiency and the steam flow rate ar... | 06/28/2005 |
| 6542832 | Error detection and correction system for use with dual-pulse output metering devices An error correction and detection system for a dual-pulse output metering device is provided. The system detects errors in the dual-pulse output of the metering device by comparing the current phase difference it between the pulse streams to a desired or ... | 04/01/2003 |
| 5876610 | Method and apparatus for monitoring liquid flow through an enclosed stream A liquid flow meter is designed to monitor the flow of a liquid through an enclosed stream such as through the tubes or internal passageways of a device such as a filtration system. The liquid flow meter includes an axial-flow magnetic turbine and a detec... | 03/02/1999 |
| 5473932 | Tandem rotor turbine meter and field calibration module Methods and an apparatus for measuring gas flow with greater reliability than earlier single-rotor and double-rotor turbine meters and dual turbine meter systems are disclosed. The apparatus comprises two independent rotors, in close proximity of each oth... | 12/12/1995 |
| 5251149 | Electronic nutating disc flow meter The electronic nutating disc flow meter is suitable for measuring different liquids with varying viscosities. This meter is best suited for measuring medium viscosity fluids of 10 to 450 centipoise. This flow meter includes a microprocessor to correct for... | 10/05/1993 |
| 5207088 | Expansion chamber method and apparatus for eliminating accuracy errors when testing gaseous flowmeters A properly designed expansion chamber is mounted in a flowmeter test equipment configuration to quench or prevent pulsations from resonating the acoustic cavities in the configuration and, thereby, eliminate resonation errors in testing the accuracy of th... | 05/04/1993 |
| 5072416 | Method and apparatus for calibrating a flowmeter using a master meter and a prover A double cycle prover is used to calibrate meters which require long proving runs. A small volume or piston prover and a master flowmeter, are coupled in series with the meter under test, then the master flowmeter is calibrated against the small volume pr... | 12/10/1991 |
| 4996870 | Apparatus and method for proving gas meters and improved sensor therefor Apparatus and method for proving a test meter comprising a standard for a test gas to a meter; encoder means for determining the amount of test gas supplied from said standard; valve for regulating the flow of gas from said supply means; a sensor comprisi... | 03/05/1991 |
| 4945754 | Test water meter with digital display A test water meter including a digital display is portable, as well as battery-operated. The digital display includes a gallon-per-minute display and a total gallon display, each of which is resettable at any time, as well as an additional total gallon di... | 08/07/1990 |
| 4694681 | Measuring turbine A measuring turbine with a turbine rotor arranged in a flow channel of the measuring housing comprises a turbine rotor and an inductive pulse pickup, wherein between the wall of the housing of the flow channel and the circumference of the turbine rotor an... | 09/22/1987 |
| 4674316 | Calibration system for mechanical gas volume corrector A calibration system for a mechanical gas volume corrector which has a first shaft turned at a rate corresponding to the otherwise uncorrected volumetric flow rate through the meter, a second shaft, a variable ratio transmission coupled between the first ... | 06/23/1987 |
| 4658634 | Meter prover A proving apparatus and method for large capacity rotary type gas meters having a blower assembly for connection downstream to the test meter, a pulsation dampener for connection upstream to the test meter, and a turbine-type reference meter for connectio... | 04/21/1987 |
| 4584864 | Method and apparatus for proving and factoring a meter stack A method and apparatus for proving and factoring a meter stack on a flow pipe. The meter stack preferably includes a meter, temperature compensator, and counter and in accordance with the present invention, the meter is positioned within the flow pipe for... | 04/29/1986 |
| 4566307 | Pipeline flow measurement proving system A pipeline flow measurement proving system has a custody transfer insertion turbine meter mounted at a first location on a fluid pipeline. A proving insertion turbine flow meter is mounted at a second location on the pipeline upstream from the custody met... | 01/28/1986 |
| 4502318 | Method and apparatus for calibrating flow meters The specification discloses a method and apparatus for calibrating liquid flow meters of all types. The system includes a scale for dynamically determining the weight of a liquid flowing through a flow meter, together with means for measuring the flow thr... | 03/05/1985 |
| 4463613 | Calibratable turbine wheel gas meter with exchangeable measuring insert A calibratable turbine wheel gas meter includes a tube member having a lateral stud which carries a counter. An exchangeable measuring insert comprises an inlet member including an inlet body and an outlet member including an outlet body and is inserted i... | 08/07/1984 |
| 4448058 | Respiratory gas analysis instrument having improved volume calibration method and apparatus An improved gas volume calibration method and apparatus for use in respiratory gas analyzers. A control unit monitors the flow of calibration gas through the analyzer by monitoring the electrical signals produced by a gas turbine and a breath switch. Duri... | 05/15/1984 |
| 4419898 | Method and apparatus for determining the mass flow of a fluid A method of determining the mass flow of a fluid comprising measuring a plurality of parameters comprising the pressure P, the temperature T and the density .rho. of the fluid, determining the specific gravity G of the fluid from the said parameters, and ... | 12/13/1983 |
| 4091653 | Turbine meter in-line checking apparatus and method This invention discloses apparatus and method for checking the calibration of a fluid turbine meter without interrupting the line service. A flow directions sensing means is inserted at the downstream side of the flowmeter so that the angle of flow the di... | 05/30/1978 |
