Methods and means for detecting the presence of moisture adjacen

Details Methods and means for detecting the presence of moisture adjacen Methods and means for detecting the presence of moisture adjacen

1970-03-19

1977-03-22

Moose, Harry

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

174 11R, 200 6105, 340235, H02H 726

Patent

active

040139247

ABSTRACT:
A method of detecting the presence of moisture adjacent the exterior side of tubes in a pipe system such as a subterranean district heating system of insulated tubes, whereby it is measured or registered whether an electrical conductivity exists between two electric conductors permanently positioned immediately adjacent the tube in supposed dry and electrical insulating but hygroscopic surroundings. Furthermore, a pipe system and a pipe having means for facilitating the use of the said method, these means comprising one or more electrical conductors extending along each pipe embedded in the insulating material surrounding the pipe.

REFERENCES:
patent: 1257452 (1918-02-01), Bowden et al.
patent: 1337866 (1920-04-01), Whitaker
patent: 2056085 (1936-09-01), Alles
patent: 2752586 (1956-06-01), Jordan
patent: 3365661 (1968-01-01), Zimmerman
patent: 3382493 (1968-05-01), Loper et al.

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