Patent
Holiday detector utilizing staggered capacitor discharges for producing a fast rise time high-voltage pulse
TLDR
In this article, an electrical detector that can detect holidays or defects in insulating coatings or mastic coatings generally applied to pipelines has been proposed to detect defects in pipelines.Abstract:
An electrical detector operable to detect holidays or defects in insulating coatings or mastic coatings generally applied to pipelines has a portable DC power supply, a DC to DC converter, an energy storing means operable to store energy from the DC converter, and SCR interconnected with the energy storing means, an oscillator means for gating the SCR on to discharge the energy storing means through a double primary pulse transformer to produce a high voltage, fast time pulse on an exploring electrode, and an alarm circuit capable of audibly and/or visually indicating that a high voltage has arced through the pipeline coating at a holiday point.read more
Citations
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Patent
Composite anode, electrolyte pipe section, and method of making and forming a pipeline, and applying cathodic protection to the pipeline
TL;DR: In this article, an anode is embedded in an electrolyte layer applied to the surface of a pipe section to provide an ionic conductive path between the anode and structure to supply cathodic protection to the structure, where the natural environment may not provide a continuous electrolyte.
Patent
High voltage breakdown test circuit for insulation testing utilizing a predetermined fixed amount of energy
TL;DR: A high voltage breakdown test circuit for testing of insulation resistance within an electrical device is disclosed in this article, where operator safety is attained by allowing a fixed amount of energy considered nonlethal and advantageously imperceptible into the test circuit and by the internal system design.
Patent
In-pipe coating integrity monitor for very long pipes
TL;DR: In this paper, a tether free piggable inspection tool capable of detecting holidays and able to read and store nonconductive internal coating thickness values in very long conductive pipes, along with distance values for further off-line analysis, is described.
Patent
Body fluid analyzer
James R. Braig,Richard Keenan +1 more
TL;DR: In this article, a method for maintaining clear passageways in an extracorporeal blood flow system (5000) is described, which comprises intermittently providing one or more anti-clotting agents to a passageway of the extracororeal bloodflow system.
References
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Patent
Apparatus for detecting imperfections in insulating materials
TL;DR: In this article, an electric testing apparatus which will provide an efficient means for testing insulating materials has been proposed and applied to the particular problem to which this invention has been applied.
Patent
Apparatus including time controlled indicating means and constant energy discharge storage means for electrically testing for holidays in insulating coatings
John P Rasor,Robert B Fisher +1 more