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4313086 |
Method and apparatus for separating oil and water and measuring the amount of oil
A method of measuring relatively small amounts of hydrocarbon oil contained in water, or other immiscible liquids including mixing a solvent and a conductivity additive with the oil and water or...
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4210486 |
Process for determining the effective doping agent content of hydrogen for the production of semiconductors
A process for determining the effective doping agent content of hydrogen the production of semiconductors which comprises zone drawing a silicon rod of highest purity and having a known specific...
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4166244 |
Leakage detection system for radioactive waste storage tanks
A combination of elements for detecting leakage of electrically conductive fluids from tanks, including a reference electrode, an AC generator connected between the tank and the reference...
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4135151 |
Apparatus for detecting wet and icy surface conditions
Apparatus for detecting wet and icy conditions on the surface of a pathway. A block of electrically insulative material is embedded in a pathway with the top surface of the block being...
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4103227 |
Ion-controlled diode
Disclosed is an ion-controlled device for providing an electrical indication of a specific ion concentration in a fluid. An ion-sensitive membrane is placed over the junction of a gate controlled...
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4101827 |
Method and apparatus for determining the location of a leak in a pipe buried underground
The location of one or more leaks in a pipe made from an electrically insulating material and which is buried in an electrically conductive medium, typically a pipe buried underground, is...
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4070616 |
Method and apparatus for detecting fish in water
Apparatus for detecting and counting fish in a stream in which three electrodes extend horizontally across the stream and are immersed in the water, the electrodes being connected to form the two...
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4030028 |
Method of and apparatus for detecting conductive particles in an oil flow system
A method and apparatus for sensing the presence and quantity of conductive particles in an oil flow system is disclosed which method and apparatus is based on a novel sensor element comprising a...
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3988669 |
Automatic control and detector for three-terminal resistance measurement
A device is provided for automatic control and detection in a three-terminal resistance measuring instrument. The invention is useful for the rapid measurement of the resistivity of various bulk...
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3870952 |
Ballast resistance and track continuity indicating circuit
A track quality meter for determing ballast resistance of a track section, regardless of whether or not the track section is insulated. An oscillator produces a signal at an appropriate frequency...
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3855531 |
METHOD OF TESTING THE SEALS OF FOOD CONTAINERS AND CONTAINERS SUITABLE THEREFOR
A thin-walled flexible container containing sterilised foodstuff is tested by measuring the electrical conductivity of a path from the interior of the container through the seal to the outside. A...
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3803485 |
INDICATING COATING FOR LOCATING FATIGUE CRACKS
Crack propagation through a substantially electrically nonconductive coating bonded to an electrically conductive base is monitored or detected by providing a multitude of reservoirs filled with an...
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3800219 |
METHOD AND APPARATUS FOR DETECTING OIL POLLUTION IN WATER
An apparatus which floats on the surface of the water in which oil pollution is to be detected. The apparatus comprises a collector wheel having an oleophilic perimeter surface (such as...
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3769581 |
APPARATUS FOR MEASURING THE DRY UNIT WEIGHT OF A SOIL
Apparatus for measuring the dry unit weight of a soil, either directly or with reference to a known soil variable (e.g., the Proctor density) by means of a measuring probe containing two electrodes...
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3754186 |
POWER FACTOR MEASURING CELL ARRANGEMENT
A cell for measuring the power factor of oil including a guard electrode, a center electrode and an outer electrode, all of which are adapted to be immersed in a test sample of the oil. The center...
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3746975 |
MEASURING CHARACTERISTICS OF MATERIALS BY USING SUSCEPTIVE AND CONDUCTIVE COMPONENTS OF ADMITTANCE
A system for measuring a condition of a material using an admittance probe or probes which are immersed in or placed in proximity to the material, in which both the susceptive and conductive...
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3746980 |
METHOD AND APPARATUS FOR MEASURING CHARACTERISTICS OF ELECTRIC CIRCUITS
Method and apparatus for measuring characteristics of an electric circuit. The method comprises the steps of connecting an adjustable voltage source to the opposite end terminals of a shunted...
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3731297 |
APPARATUS FOR DETECTING THE ACID FORMATION IN LIQUID SOLVENTS
The present invention comprises a method and apparatus for detecting acid-formation in non-conductive liquids by monitoring the change in resistance brought about by the acid-corrosion of a metal...
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3721898 |
APPARATUS FOR DETECTING LEAKAGE FROM OR RUPTURE OF PIPES AND OTHER VESSELS CONTAINING FLUID UNDER PRESSURE
A frangible covering encircling the vessel in sealed relationship has insulated electrically conductive means, preferably a plurality of spaced wires, distributed over the area of the covering. A...
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3657640 |
GLASS CONDUCTIVITY AND TEMPERATURE PROBE
A device for measuring the conductivity and/or temperature of glass in molten state. A probe including a hollow elongated member of nonconductive material has a pair of spaced external bands of...
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3634757 |
MEASURING BRIDGE HAVING A TEMPERATURE-COMPENSATING TRANSISTORIZED VOLTAGE STABILIZER SHUNTING THE POWER SUPPLY TO THE BRIDGE
A direct-current supply circuit for apparatus of the type in which a measuring bridge is provided comprising at least one electric dosing filament, the resistance of which is a function of a value...
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3634758 |
MEASURING THE FUNCTIONING TIME OF A SEMICONDUCTOR ELECTROEXPLOSIVE INITIATOR
The functioning time of a semiconductor electroexplosive initiator is determined by applying to the initiator a voltage capable of firing it and measuring the time it takes for the initiator to...
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3621386 |
METHOD OF DETERMINING BONDING IN A COMPOSITE SUPERCONDUCTOR
Bond quality between a superconductor and a coating thereabout of normal material having high electrical conductivity at superconducting temperatures is measured by interrupting the electrical...
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3569828 |
ELECTRICAL APPARATUS FOR DETECTION OF THERMAL DECOMPOSITION OF INSULATION
This invention comprises an article of manufacture made up of alternating layers of electrically conductive rubber and electrically nonconductive rubber with power supplied to each of the...
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3488584 |
METHOD AND APPARATUS FOR RESISTIVITY MEASUREMENT OF FLOWING HIGH TEMPERATURE LIQUID METALS
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3479585 |
SYSTEM FOR MEASURING THE IMPEDANCE AND PHASE OF A SOLID PROPELLANT INCLUDING A CONSTANT CURRENT SOURCE
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3469184 |
METHOD OF ANALYZING A SUBSTANCE UTILIZING A TUNNELING JUNCTION
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3462683 |
METHOD AND APPARATUS FOR DETERMINING THE RELATIVE VOLUME OF CRYSTALLINE SOLIDS IN SOLUTION HAVING AT LEAST ONE PAIR OF ELECTRODES WITH ELECTRODE SPACING LESS THAN CRYSTAL SEPARATION DISTANCE
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3412325 |
Electrical conductivity test method for determining active clay content in molding sand compositions
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3387209 |
Method and apparatus for measuring the metal oxide content of liquid metal
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3382430 |
Double bridge apparatus for determining electrolytic conductivity
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3382429 |
Method of and apparatus utilizing bridge for measuring conductivity
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3323050 |
Method for determination of combined oxygen in liquid alkali metals
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3320529 |
Method for testing a dielectric liquid
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3319159 |
Method and apparatus for determining the amounts of gases dissolved in liquids
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3281681 |
Device for measuring the electrical resistance of molten glass
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3278844 |
Means for measuring the electrical resistance of molten glass in a tank
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3256483 |
Magneto-resistive sensing device
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3233174 |
Method of determining the concentration of active impurities present in a gaseous decomposable semiconductor compound
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3218552 |
Solids determinator for establishing pounds of solids in fruit
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3192474 |
Method and apparatus for determining the quality of a weld or solder joint by measurement of the dynamic resistance of the joint
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2996660 |
Electrical testing device
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2973477 |
Interface detection in deep holes
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2965842 |
Detection of ambient components by semiconductors
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2921257 |
Method of testing electrically conducting films
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2891219 |
Low current resistance measuring device
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2782369 |
Determination of contamination of liquid metals
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0931594 |
Title is not available
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3567383 |
Title is not available
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3566262 |
Title is not available
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