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7518376 |
Electric field probe
This is an electronic scanning probe, preferably made up of at least two sensing elements, each sensing element substantially surrounded by reference electrodes. These sensing elements are...
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6650125 |
Leak and pipe detection method and system
A method and system for locating leaks of conductive fluids from non-conductive pipes and other structures or for locating non-conductive pipes or structures having conductive fluid contained...
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6498496 |
Device for detecting membrane leaks in a diaphragm pump
Device to detect leaks and fatigue in membranes wherein the membrane consists of at least two membrane layers, and wherein at least one of the membrane layers includes a conductor on its inner...
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6229314 |
Testing hypodermic syringes prior to automated filling
A syringe subassembly comprised of a tubular syringe body having a front end provided with a forwardly projecting needle and fitted over the needle with a cap of a dielectric material is tested by...
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6160406 |
Condom testing apparatus
A condom testing apparatus utilizing an arcing electrical current to detect holes and excessively thin wall areas in a condom mounted on a conductive testing mandrel, where the condom is passed...
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6051977 |
Method and apparatus for locating coating faults on buried pipelines
A coating fault locating technique transmits a base electric signal from a power source to a buried metal pipe. A location of a coating fault in the buried pipe is detected by detecting a gradient...
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5963041 |
Device and method for testing surgical instruments
A testing device for detecting defects in insulation of electrosurgical instruments that includes an implement or wand having a distal end, an electrode for generating a spark adapted to detect a...
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5855721 |
Non-destructive method of determining the position and condition of reinforcing steel in concrete
A method of determining the position and condition of reinforcing steel embedded in concrete is described. The method is non-invasive. Electrodes are use to carry out the method by contacting the...
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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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5684405 |
Wet/dry hot stick tester
A wet/dry hot stick tester designed to provide a dry test of a hot stick by applying a voltage equivalent to 100 KV/ft to the hot stick, and to provide a wet test of a hot stick by applying a...
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5680053 |
Method for testing insulated electrosurgical instruments
A testing device for detecting defects in insulation of electrosurgical instruments that includes an implement or wand having a distal end, an electrode for generating a spark adapted to detect a...
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5640096 |
Elastomer leak detection apparatus
Portable apparatus for inducing an alternating electrical gradient into an impounded liquid media and including, directionally sensitive, sensing apparatus for monitoring gradients established in...
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5455507 |
Method and apparatus for detecting leaks in electrically-insulative protective articles such as condoms, surgical gloves and the like using gaseous electrostatic ions
A method and apparatus are described for detecting defects in a condom, protective glove or other similar product during manufacture. The product to be tested is situated on an electrically...
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5416420 |
Method and apparatus for the verification of an electrical insulator device based on the analysis of the electric field along the insulator
A method and apparatus for verifying the condition of an electrical insulator which is placed between two live conducting elements which are separated by the insulator. The insulator has a...
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5288168 |
Method and apparatus for lining outdoor fluid containment areas to facilitate electrical leak detection
An improved method and apparatus for waterproofing soil utilizing a flexible plastic sheet for providing a water barrier provides a system for readily detecting the presence of holes in the plastic...
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5254826 |
Contact detecting device for positioning relatively movable elements
A device for positioning a first and second conductive elements and, in particular, detecting contact at a gap therebetween without causing damage to either element. A pulse voltage, having a low...
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5204632 |
Apparatus and method for detecting leaks in surgical and examination gloves
An apparatus and method for detecting leaks in rubber or plastic articles such as surgical or examination gloves that, in general, are insulators against an electric current. The apparatus...
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5184083 |
Apparatus and method for the location of leaks by arrayed potentials and derived vectors
A system of leak detection in an impoundment including a first impoundment layer containing a brine solution, a second impoundment layer positioned beneath the first impoundment layer and having a...
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5084680 |
Detection of exposed steel in the surface of reinforced concrete
A method for detecting exposed steel in the surface of reinforced concrete, comprising the steps of: moving an electrode across an exposed surface of said concrete; connecting said electrode to one...
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4998070 |
Method and apparatus for testing a dielectric coating
A method and apparatus for testing the integrity of the dielectric coating on an elongated member. The apparatus includes a pair of opposing, conducting surfaces that can be biased against the...
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4996486 |
Method and apparatus for inspecting laminated iron core stacks for interlamination shorts
In order to detect interlamination shorts (8 ) in the case of laminated core stacks, the core stack (1) is magnetized with an auxiliary winding. The iron surface (15) is scanned with a measuring...
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4982163 |
Method and a device for the determination of the condition of the insulation of an object coated with an electric insulation
The invention relates to a method for the determination of the condition of the insulation of an object (1) made of an electrically conducting material, coated with an electrical insulation (2) and...
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4962360 |
Sensor for electrochemical measurement and method for diagnosing corrosion protective properties of metal surface coating by using the sensor
A sensor for electrochemical measurement is disclosed which includes a chamber made of an electrically insulative material and having an open end portion, a super absorbent polymer material filled...
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4958128 |
Method of examining an inside surface-coated metallic pipe and apparatus
A process for detecting a poorly coated portion of an inside surface of a pipe coated with an insulation coat comprises the steps of providing a plurality of pigs on a conductor at predetermined...
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4912418 |
Method and device for detecting the location of a fault within a dielectric layer of an electrically conducting pipe
A method and a measuring device for localizing a damage in a dielectric corrosion resistant layer of a pipe line are described, especially for an enameled pipe line, through which an...
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4904935 |
Electrical circuit board text fixture having movable platens
A test fixture is provided for contacting selected terminals (10, 10') of an electrical assembly for testing by a test device (28). The fixture includes spaced-apart upper platen (2), middle platen...
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4846936 |
Method and apparatus for measuring metal exposure in resin covering portion in metal container and constituent member thereof
Disclosed is a method for measuring the metal exposure in a resin covering area of a metal container or a constituent member thereof, which comprises contacting the resin covering area of the metal...
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4839601 |
Directional current finder
An electrical detection system for locating a position of interest in a medium which is electrically conductive includes a signal generator, a source, a sink and at least two probes. The probes are...
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4806849 |
Method and apparatus for diagnosing degradation of coating film on metal material
Method and apparatus for diagnosing degree of degradation of a coating film of a painted metal material by dividing the surface of the painted metal material into a number of small area zones,...
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4771246 |
Method for determining the location of a leak in a pond liner formed of electrically insulating material
A system for determining the location of a leak in a pond liner made of electrically insulating material supported by a medium which is electrically conductive consists of a movable nozzle for...
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4760343 |
Apparatus for detecting defective insulators in an insulating column supporting an electrical conductor in a power circuit line
A method and apparatus for detecting defective insulators in an insulating column supporting an electrical conductor in a power line. The column is made of a plurality of serially connected...
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4758792 |
Method for utilizing a spherical dipole probe for detecting faults in high voltage transmission line insulators
A method is provided for utilizing a nonintrusive, noncontacting electric field sensing device to detect faults in high voltage transmission line insulators. The electric field surrounding an...
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4740757 |
Method and apparatus for locating leaks in a multiple layer geomembrane liner
A leak detection and location method and apparatus for detection of perforations in a obscure geomembrane liner is set forth. In a typical application, upper and lower liners are positioned...
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4725785 |
Directional potential analyzer method and apparatus for detecting and locating leaks in geomembrane liners
A directional potential analyzer method and apparatus using a non-intrusive electrical measurement technique to obtain a precise location of a leak in a geomembrane liner. The method and apparatus...
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4725778 |
Detecting resistance faults
Resistance faults, for example across insulating joints of cathodically protected pipelines may be evaluated by comparing magnetic field strengths associated with a test current of predetermined...
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4719407 |
Automated search apparatus for locating leaks in geomembrane liners
An automated search apparatus is disclosed for detecting leaks in liquid impoundments usually defined by a geomembrane layer. A voltage gradient is created within the impoundment by means of a...
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4584521 |
Method of detecting the defects in a dielectric coating at the surface of an electrically conductive underlayer
The method consists in placing a conductive underlayer (1) coated by a dielectric layer (5) in a conductive medium in which an excitation electrode (2) is positioned at a distance from this...
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4546310 |
Electrical continuimeter
Electrical continuimeter device for checking the electrical continuity of a conducting layer covering a structure having conducting and non-conducting parts, said conducting layer being covered by...
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4543525 |
Method for determining a leak in a pond liner of electrically insulating sheet material
The location of a leak in a pond liner made of a sheet of electrically insulating material, such a polyvinyl chloride, supported by an electrically conductive medium, an example of which is a...
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4404515 |
System and method for use with apparatus for sensing bare metal on a moving strip of insulatively coated conductive material
A detector for detecting bare metal on a moving strip of insulatively coated conductive metal includes a plurality of sensors arranged along the edges of both sides of the strip. Each sensor...
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4390836 |
Method and apparatus for the detection of pipeline holidays
A method and apparatus are provided for detecting and locating holidays in an insulating coating of a subterranean pipeline. An alternating current is induced in the portion of the pipeline being...
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4381486 |
Apparatus for checking for electrical frit breakdown in kinescopes
An apparatus for checking for electrical frit breakdown in kinescopes includes a support for loosely receiving the kinescope funnel. A floating positioning means closely receives the neck of the...
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4365191 |
Method and apparatus for electrical surveys of offshore metal structures with correction for distance
In the present invention a method and apparatus for electrical surveys of offshore metal structures includes measuring the electrical potential difference between the structure and an electrolyte,...
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4357573 |
Method of surveying sub-sea pipeline
This invention relates to monitoring the condition of sheathings which electrically insulate a submarine structure brought to an electrical potential differing from that of the sea water, or to...
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4356444 |
Test system for cathodic protection circuit of an underground pipeline
An apparatus for testing the pipe-to-soil potential of a buried pipeline having a plurality of rectifiers electrically connected to it in spaced-apart intervals for applying an electrical potential...
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4348635 |
Detecting and measuring the position of a break in solid formations by measuring the capacitance of an enlongated element embedded therein
This invention relates to an apparatus and method for detecting and measuring the position of a fracture in solid formations, such as for example a grout filled borehole. An electrical element is...
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4258323 |
Cathodic survey apparatus
An apparatus for locating an electrical leakage fault path relative to a cathodically protected buried pipe utilizes a conductor wire having a first end connected to the pipe and a second end wound...
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4228399 |
Offshore pipeline electrical survey method and apparatus
A method and apparatus for conducting offshore pipeline electrical surveys is characterized by initially locating and marking the pipeline, traversing the length of the pipeline towing a reference...
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4134061 |
Pipe current detector with plural magnetic flux detectors
Apparatus for measurement, above the surface of the ground, of an electrical current flowing in a buried pipeline, comprises a pair of magnetic flux detectors oriented with their axes vertical, and...
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4104579 |
Method of examination of protective coatings
A method and assembly for detecting the presence of a failure in a protective coating on the surface of a metal body which comprises causing an electrolyte to make contact with the protective...
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