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| Number | Title | Issue Date |
| 8091433 | Ioniser type gas meter having modulating electrode downstream of ioniser A gas meter gas a conduit for passage of a gas flow; an ioniser arranged to ionise the gas flow in the conduit; a modulating electrode structure arranged for modulating the ion distribution in the ionised gas flow; and at least a detecting electrode structure downst... | 01/10/2012 |
| 7854175 | Apparatus for measuring the velocity of a fluid flow An apparatus for measuring the velocity of a fluid flow provides electrical charge carriers that are emitted into the fluid flow from an emitter electrode, and wherein an electrical signal caused by this is measured at a sensor electrode. The projection of the envel... | 12/21/2010 |
| 7685887 | Air flow meter for an automobile An air flow meter includes a tube having an exterior surface and an interior surface, which defines an interior space. A collector is disposed within the interior space of the tube and a plurality of transmission pins protrude from the interior surface of the tube. ... | 03/30/2010 |
| 7523673 | Ionization based multi-directional flow sensor A method, system, and apparatus for conducting real-time monitoring of flow (airflow for example) in a system (a hybrid power generation system for example) is disclosed. The method, system and apparatus measure at least flow direction and velocity with minimal pres... | 04/28/2009 |
| 7478564 | Air flow meter for an automobile An air flow meter includes a tube having an exterior surface and an interior surface, which defines an interior space. A collector is disposed within the interior space of the tube and a plurality of transmission pins protrude from the interior surface of the tube. ... | 01/20/2009 |
| 7339778 | Corona discharge static neutralizing apparatus A corona discharge static neutralizing device includes a wire electrode retained in tension between spaced ends of a resilient support member that is positioned within a flowing air stream. Another electrode aligned with and spaced from the wire electrode promotes a... | 03/04/2008 |
| 5724982 | Apparatus and method for measuring fluid flow A method and apparatus for measuring the flow rates of fluids is disclosed. The apparatus comprises a probe which may be placed in a fluid inside a vessel, such as a blood vessel. The probe comprises at least one pair of conductors to which the circuit pr... | 03/10/1998 |
| 5701009 | Gas detection devices Gas detector includes structure (10) defining a gas flow passage (11), means (12) for passing an ultraviolet light beam (13) across the passage, and first and second electrodes (16, 17) downstream of the ultraviolet light means (12), at least one of the f... | 12/23/1997 |
| 5439003 | Apparatus and method for measuring fluid flow A method and apparatus for measuring the flow rates of fluids is disclosed. The apparatus comprises a probe which may be placed in a fluid inside a vessel, such as a blood vessel. The probe comprises at least one pair of conductors to which the circuit pr... | 08/08/1995 |
| 5265477 | Detection device for detecting the flow and direction of ground water Flow characteristics of a fluid are determined by introducing an electrolytic pulse at a highly localized point within the fluid without disturbing the flow field of the fluid or the form of the pulse and subsequently mapping voltage or conductivity aroun... | 11/30/1993 |
| 4953407 | Ion-drag flowmeter In an ion-drag flowmeter, an improvement is provided for alleviating the problem that the deflection of the ion stream may be altered dependent upon the concentration of polar molecules due to changes in the mobility of the ions caused by the clustering o... | 09/04/1990 |
| 4939466 | Method and apparatus for sensing the regeneration of a diesel engine particulate trap A diesel engine exhaust system is provided with a particulate trap for collecting the products of incomplete combustion during the engine power cycle. A sensing mechanism including an electrode downstream of the trap and a signal generating circuit provid... | 07/03/1990 |
| 4680962 | Fluid flow rate and direction measuring apparatus A fluid flow measuring device which does not disturb the fluid flow, in one embodiment is responsive to flow in each of three orthogonal directions. A central electrode carrying ionizing needle electrodes is combined with a concentric and coaxial open ion... | 07/21/1987 |
| 4594901 | Electrostatic flow meter The mass flow rate of particles conveyed by a gaseous medium through a conduit is measured by an electrostatic flow meter comprising a grounded electrical conductor in contact with a semiconductive static charge-generating element exposed to the moving pa... | 06/17/1986 |
| 4592240 | Electrical-charge sensing flowmeter An element interacting with a stream of a fluid moving through a pipe generates periodic sub-flows at a rate that varies in accordance with changes in the velocity of the moving fluid. The generation of sub-flows also modulates the electrical charges cont... | 06/03/1986 |
| 4471654 | Fluid flow measuring apparatus A fluid movement measuring apparatus having ion collecting electrical conductors spaced from an ion generating source located within a housing. The housing has one or more circumferential rows of openings in communication with the space or fluid flow path... | 09/18/1984 |
| 4448082 | Differential type transit-time ionic pickup Ionic air-flow pickup (1) consisting of two working areas (2) and (3) separated by an intermediary grid (4) and associated with devices (5) to power the emission area (2) and devices (8) to detect the signals given off by the receiving area (3) in order t... | 05/15/1984 |
| 4441371 | Gas flow meters A corona-discharge type gas flow meter includes a discharge electrode, and a split collecting electrode, the collecting electrodes are connected to input amplifiers which act as current-to-voltage converters receiving a reference signal from an integrator... | 04/10/1984 |
| 4409822 | Ionic pickup for the transit time between an emission area and a receiving area An ionic transducer for measuring the transit time of stream of ionized particles produced at an emission station and flowing towards a receiving station, which is used for controlling the richness of the air-fuel mixture fed into an internal combustion e... | 10/18/1983 |
| 4394825 | Fluid flow measuring apparatus A fluid movement measuring apparatus having ion collecting electrical conductors spaced from an ion generating source located within a housing. The housing has one or more circumferential rows of openings in communication with the space or fluid flow path... | 07/26/1983 |
| 4393719 | Ionization flowmeter A flowmeter for the measurement of fluid flow employs a combination of two transit times for the passage of charged particles through a known distance under different conditions. Applications include the measurement of the air-fuel mixture in automobile e... | 07/19/1983 |
| 4387602 | Pressure compensated circuit for ion mass airflow sensors An improved detection circuit for an ion mass air flow sensor having a feedback circuit from the differential output of the sensor to the regulatory input of the high voltage supply. The feedback signal provides a second order correction to the output vol... | 06/14/1983 |
| 4381679 | Pick-up for the measurement of the velocity of an ionization gas A pick-up for measuring the velocity of a gas by ion transit time including a coupling positioned between a valve for the gas, the velocity of which is to be measured and an electrode serving to measure the transit time inside a conduit delimiting the gas... | 05/03/1983 |
| 4347738 | Oceanographic transducer A detector unit for investigation of fluid currents in conducting liquids, uch as sea water, for example, employs two similar metal electrodes in contact with the fluid, one exposed to the fluid current and the other protected therefrom.... | 09/07/1982 |
| 4345478 | Gas flow measuring device The invention concerns the measurement of one or two components of the speed vector of a gas flow, in particular the projection in one plane of this vector. The device comprises a section of conducting wire brought to a high electrical potential by a high... | 08/24/1982 |
| 4331037 | Fluid flow measuring apparatus A fluid movement measuring apparatus having ion collecting electrical conductors spaced from an ion generating source. Ions migrating across the space are deflected by moving fluid in the direction of the fluid flow. Electrical currents caused by ions col... | 05/25/1982 |
| 4305301 | Measurement of the mass flow of a liquid Apparatus for measuring the mass flow of a fluid comprises a hollow collector electrode assembly through which the fluid flows. The collector electrode assembly includes a central electrode disposed between and insulated from first and second outer electr... | 12/15/1981 |
| 4304124 | Charging mechanisms for electrogasdynamic spectral anemometer A practical charging mechanism for an electrogasdynamic spectral anemometer sing ultraviolet radiation. Ultraviolet radiation issues through windows in the wall of a test section through which flows a turbulent gas. The UV ionizes aerosol particles in the ... | 12/08/1981 |
| 4272995 | Ionization flow meter An ionization flow meter which can determine with high accuracy the flow of a gas expressed as a gas velocity, volume flow, or mass flow and substantially independently of pressure, temperature and, as the case may be, moisture content. By applying the th... | 06/16/1981 |
| 4248086 | Device for measuring the mass flow or flow rate of an insulating liquid A device for measuring the mass flow or flow rate of an insulating liquid which entrains ions produced by an electrode positioned in the path of the liquid flow, this electrode being brought to a certain potential with respect to at least one other electr... | 02/03/1981 |
| 4193296 | Method and an instrument for the measurement of the flow rate of gases based on ionization A method and apparatus for measuring the flow rate of gases comprises the placing of a small radioactive source material in the path of the gas flow, establishing an electrical potential between one electrode and two other electrodes disposed transversely... | 03/18/1980 |
| 4167114 | Device for measuring the mass flow or flow rate of a gas A device for measuring the mass flow or flow rate of a gas which entrains ions produced by an electrode positioned in the path of the gas flow, this electrode being brought to a certain potential with respect to at least one other electrode also arranged ... | 09/11/1979 |
| 4163389 | Method and apparatus for electrical measurement of fluid flow rate Flow rate in a fluid passage is measured by making corona discharge in a section of the fluid passage to cause partial ionization of the fluid and measuring a current produced in a DC circuit including a pair of electrodes disposed in the fluid passage do... | 08/07/1979 |
| 4156364 | Ionic conduction angular rate sensor The present invention relates to a sensing device having a chamber containing positive and negative ions, wherein a fluid flow is directed into the chamber and ionized. The ionized flow passes between a plurality of conductive plates, the outputs from whi... | 05/29/1979 |
| 4144750 | Gas flow transducers and I.C. engine control systems incorporating such transducers An ion discharge type gas flow meter with an impedance control determining the total discharge current includes a humidity compensation circuit which varies the impedance control to compensate for changes in humidity.... | 03/20/1979 |
| 4136564 | Mass flow rate detector of electrostatic type A flow rate detector of the type comprising a corona discharge circuit to cause partial ionization of a fluid at a section of a fluid passage and a probe positioned downstream for detecting the amount of ions carried by the fluid as an indication of the f... | 01/30/1979 |
| 4131013 | Ionic air speed indicator The invention relates generally to measuring the air speed of an object moving within the earth's atmosphere. In particular, the invention provides apparatus which comprises means for causing an air flow to enter an electric E field chamber, proportional ... | 12/26/1978 |
| 4127029 | Ionic measuring device A device for measuring the mass flow or speed of a gas in a pipe comprising a first annular insulating member which supports an ionic source electrode, a second annular insulating member spaced from the first element in the flow direction, the second memb... | 11/28/1978 |
| 4121456 | Meter for the flow rate or the speed of a gas stream There is described a meter for the flow rate or the speed of a gas stream, by converting an electric potential metering, which comprises a pair of so-called outer tubular electrodes connected to an electric voltage source and through which the gas stream ... | 10/24/1978 |
| 4104913 | Apparatus for measuring the mass flow of a fluid Apparatus for measuring the mass flow of a fluid comprises a first ionizing electrode which, in use, is located in the path of fluid flow and, when energized, ionizes said fluid. A second substantially cylindrical, hollow collector electrode extends aroun... | 08/08/1978 |
