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5963040 |
Method and apparatus for detecting pin-holes in a passivation layer
The present invention discloses a novel method and apparatus for de-etching pin-holes in a passivation layer that is deposited over a metal conductor layer on the surface of a semiconductor wafer...
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5955886 |
Microliter-sized ionization device and method
A microliter-sized metastable ionization device with a cavity, a sample gas inlet, a corona gas inlet and a gas outlet. A first electrode has a hollow and disposed in the cavity and is in fluid...
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5929641 |
Breakdown event detector
A cathode ray tube may utilize a focus mask color-selection structure. The focus mask structure is susceptible to localized, transient short circuit events, or breakdown events. These events may be...
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5913236 |
Protection system for hydraulic systems against leaks/floods, freezing and pressure
A protection system for hydraulic systems, mainly for pipes, faucets, valves, boilers, furnaces, etc. which consists of a handling panel, a cut-off valve, a fluid leak detector, at least one...
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5907280 |
Static electrification assisted dielectrokinesis detection of plastics and other materials
A dielectrokinesis detector includes a chamber housing an exact dielectric replicate reference material that is subjected to external static electrification. The reference material is mechanically...
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5907240 |
Method and apparatus for cell differentiation by measuring apparent cell size, membrane integrity and intracellular complexity
A method and apparatus are provided for differentiating cells in an automated particle analyzer, such as for use in hematological analysis, by measuring apparent cell size (or volume), membrane...
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5900270 |
Technique for testing and coating a microporous membrane
The integrity of a microporous membrane within a mass transfer device such as an oxygenator is tested simultaneously with applying a biocompatible surfactant to at least the blood-contact surface...
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5898298 |
Inductor/capacitor-based measuring system for a moving body
A measuring system measures forces, deformations, and movements. The measuring system comprises at least one LC-circuit, at least one power supply for generating a voltage and a current in the...
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5889396 |
Method and device for measuring the quantity of an active principle contained in a reservoir
A solution of active principle, in ionized form, impregnates a layer (2) forming part of the reservoir (1). A measurement of the quantity of active principle contained in this layer is derived from...
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5889404 |
Discharge ionization detector having efficient transfer of metastables for ionization of sample molecules
In a discharge ionization detector, a method and apparatus are disclosed for increasing the transfer of photons and metastables from a discharge chamber to a ionization chamber, while effecting ion...
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5872447 |
Method and apparatus for in-situ measurement of polymer cure status
An apparatus and a method for determining the cure state of thermosetting polymers using time domain reflectometry. A miniature capacitor is constructed at the end of a coaxial transmission line...
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5869971 |
Method and apparatus for ratiometric measurement of hematocrit
A method and apparatus for measuring resistance of a blood sample in order to determine the hematocrit of that blood sample. The present invention makes a direct ratiometric measurement. That is,...
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5850144 |
Method for detecting leaks in a membrane
A leak-testable, fluid-impervious membrane is formed as a laminate of a conductive mesh scrim between upper and lower insulative polymeric resin layers. The scrim is preferably a screen formed of a...
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5848322 |
Series capacitor ink sensor for monitoring liquid developer material
An apparatus for determining charge density and mobility in a liquid solution having electrically charged particles therein. The apparatus includes an electrode, and a dielectric member having a...
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5834634 |
Method and apparatus for measuring the toner concentration and the amount of electric charge of a two-component developing agent
A method and an apparatus for measuring the toner concentration and the amount of electric charge, capable of simultaneously measuring the toner concentration and the amount of electric charge...
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5834928 |
Method and apparatus for the detection and measurement of solid particles in molten metal
A method and apparatus for detecting and measuring suspended solid particles in a molten metal, even if the metal also contains liquid and/or gaseous inclusions. The method involves moving molten...
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5824889 |
Capacitive oil deterioration and contamination sensor
An oil deterioration and contamination sensor includes a housing, a substrate with a first capacitive plate mounted within the housing, a second capacitive plate mounted to the housing close to the...
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5820765 |
Apparatus and method for displaying the purifying efficiency of the water purifier
This invention relates to an apparatus for displaying the purifying efficiency of a water purifier. The apparatus is adapted to compare the quality of supplied water with that of purified water and...
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5814982 |
Coupon test station for monitoring the effectiveness of cathodic protection
A test station for measuring the effectiveness of cathodic protection including a cylindrical plastic reference tube extending downwardly through the soil to near the protected structure, such as a...
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5812057 |
Device for finding concealed studs
A detector device for finding concealed studs in partitioning includes a pair of plates which are supplied with ac via resistors. Amplifiers produce outputs representing the sum and difference...
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5808461 |
Circuit arrangement for air quality measurement with logarithmic signal evaluation
A circuit arrangement for air quality measuring having at least one sensor element which has resistors the resistance of which changes depending on the air composition. The circuit arrangement has...
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5789910 |
Molten metal inclusion sensor probes
A molten metal inclusion sensor probe which is immersed in the molten metal and detects inclusions therein by the electric sensing zone method comprises inner and outer steel tubes disposed one...
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5783743 |
Moisture sensor
A sensor for detecting moisture on a non-conductive support, in particular a windshield of a motor vehicle, has one or more metallic, electrically conductive layers which are arranged in a given...
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5764068 |
Method for measuring mechanical properties of thin films using a resonator in an anti-resonance regime
A method using quartz resonators probes dynamically the mechanical characteristics of thin films. This method probes the film properties at the anti-resonance frequency where the vibrational...
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5760573 |
Plasma density monitor and method
A plasma density monitor is described for determining the ion current of a plasma flowing through a conduit (14). The monitor comprises a plate (18) having a face and an orifice extending from the...
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5747983 |
Apparatus and method for measuring potentials through pavements for buried pipeline cathodic protection systems
Fluid transmission pipelines and similar structures which are cathodically protected from electrolytic corrosion and are disposed in urban areas under pavements and other structures which prevent...
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5744715 |
Tactile-acoustic information detecting and measuring apparatus and method
A tactile-acoustic transducer comprises a vibrator plate, microphone means and first and second electrode members which are connected to a source of information through a tuneable network. The...
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5729123 |
Method and apparatus for probing relative volume fractions
A relative volume fraction probe particularly for use in a multiphase fluid system includes two parallel conductive paths defining therebetween a sample zone within the system. A generating unit...
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5712559 |
Cathodic protection reference cell and corrosion sensor
A combination and unitary corrosion monitor and reference cell for cathodic protection systems includes an elongated tubular metal element of the same material as the structure to be protected and...
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5703488 |
Instrument for measuring plasma excited by high-frequency
This instrument can measure parameters of a plasma accurately and easily even though the plasma is exited by a high-frequency. The instrument for measuring parameters of a plasma generated in a...
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5700427 |
Apparatus for carrying out electrochemiluminescence test measurements
An apparatus is taught for carrying out electrochemiluminescent measurements which includes a working electrode and a temperature sensor. The electrochemiluminescent measurements made by the...
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5691633 |
Method of and apparatus for determining a property of a sample
An apparatus and method for determining a property of a sample, derived from a response obtained from the sample after an electrical pulse has been applied to it. Blood cells are subjected to an...
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5686309 |
Method and apparatus for determination of hemoglobin content of individual red blood cells
This invention is related to an apparatus and method to determine the hemoglobin concentration of individual red blood cells by measuring the radio frequency resistance (RF) and direct current (DC)...
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5686828 |
Method for locating the joints and fracture points of underground jointed metallic pipes and cast-iron-gas-main-pipeline joint locator system
A method for locating the joints and fractures of underground cast iron gas mains comprises connecting several sections of an underground cast iron gas main pipeline across a sixty watt signal...
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5668309 |
Capacitive particle sensor
An apparatus for detecting particles within a hydraulic system having a hydraulic line includes a capacitor formed by a pair of electrodes. A charging circuit produces a charging current of...
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5656928 |
Surrounding state measuring apparatus utilizing an impedance element
Measuring apparatus includes a first element having its impedance dependant on the state of its surroundings and a second element having a variable impedance connected to the first element. A...
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5652522 |
Dielectric-loaded surface-condition sensor and method
A dielectric-loaded, microwave sensor which can detect dielectric coatings, e.g., air, water and ice, on a road surface. The sensor includes an antenna having an aperture and also includes a...
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5650620 |
Method and device for verifying that a given insulative element conforms to a reference insulative element
A method of verifying that a given insulative element conforms with a reference insulative element, comprising the steps of: emitting a primary beam of electrons impinging on the given insulative...
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5650564 |
Fluid drip detection system
A fluid drip detection system which is not prone to false alarms caused by the presence of dirt or solid particle contaminants in the fluid. The fluid drip detector comprises; a conducting hollow...
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5644241 |
Measurement of solid particle concentration in a fluid stream responsive to magnitude and rate of change of a triboelectric probe output signal
Apparatus for measuring concentration of solid particles in a fluid stream that includes a probe for disposition in the fluid stream to provide an electrical probe signal as a triboelectric...
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5643536 |
Method and apparatus for metering a reagent into a flowing medium
A method for metering a reagent into a flowing medium includes adjusting a quantity of a reagent to be metered per unit of time into a flowing medium as a function of a thickness of a reaction zone...
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5644239 |
Method and apparatus for sensing the condition of a fluid
A method and apparatus for determining the condition of a fluid used in a process, such as a lubricating oil used in an internal combustion engine. A sample of the fluid is heated to an elevated...
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5631552 |
Hemodynamic monitor for detecting air bubbles
The presence of air bubbles entrained in a liquid flowing through a tube is detected flowing the liquid through a conduit which comprises a conductivity cell with a continuous path configuration....
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5616872 |
Particle size and charge measurement in multi-component colloids
A method and device is disclosed for determining the distribution of charge and size in a colloidal system. The arrangement disclosed is adapted to measure these characteristics in an inhomogeneous...
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5616830 |
Fluid drip detector
An electric resistance measuring device situated in fluids, comprising; a housing having a bore therethrough, the bore having a seat; a movable door means situated in the bore, engagable with the...
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5610027 |
Microphoto lysis-anlaysis process to measure cell characteristics
A method of determining cell membrane strength is disclosed, using focused light of selected frequency and energy density. The method is also useful in diagnosing the presence of certain diseases...
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5610528 |
Capacitive bend sensor
A capacitive bend sensor includes a first element having a comb-patterned portion of conducting material, and a second element having a comb-patterned portion of conducting material. A dielectric...
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5608326 |
Plastics identification
Triboelectricity, that is the electrostatic charging of materials by rubbing them against one another, is used to identify particular plastics materials which produce a characteristic charge...
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5602467 |
Circuit for measuring ion concentrations in solutions
A circuit layout for measuring ion concentrations in solutions using ion-sitive field effect transistors is provided. The circuit layout makes it possible to represent the threshold voltage...
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5602468 |
Method and apparatus for ion chamber identification
An apparatus for determining the characteristics of a particular ionization chamber by measuring the capacitance of the chamber and using that capacitance to identify the particular type of chamber...
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