Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Including instrument
Patent
1994-06-24
1995-08-01
Stephan, Steven L.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Including instrument
340510, 174120SC, G08B 2900, H01B 700
Patent
active
054384745
ABSTRACT:
There is disclosed a tubular protective sheath for containing a power transmission conduit, the sheath comprising: first and second flexible elements each helically arranged to form respective inner and outer tubular members. The first element is in the form of a first electrically insulating film having respective first and second layers of electrically conductive low melt material adherent to its opposite surfaces. The second element is in the form of a second electrically insulating film having a third layer of electrically conductive low melt material adherent to one surface. The first element is configured in overlapping arrangement with the respective first and second low melt layers in contact and the second element is configured in overlapping arrangement with the third low melt layer spaced from the adjacent first or second low melt layer of the first element by the second insulating film, a break in the power transmission conduit resulting in heating of the sheath and melting of one or more of the low melt layers and flow of low melt material to form an electrical connection between the respective low melt layers of the elements.
REFERENCES:
patent: 3956726 (1976-05-01), McCarthy et al.
patent: 4785743 (1988-11-01), Dalphin
patent: 4859989 (1989-08-01), MacPherson
patent: 4972175 (1990-11-01), MacPherson
patent: 5228478 (1993-07-01), Kleisle
Patent Abstract--JP2157710--18.06.90, Matsushita Electric Ind. Co. Ltd.
Patent Abstract--JP58-130301--Furukawa, 3 Aug. 1983.
Patent Abstract--JP60-125806, 5 Jul. 1985.
Croxford Neal
Macpherson Hugh
McNaughton David
Parsons Christopher F.
Krishnan Aditya
Samuels Gary A.
Stephan Steven L.
W. L. Gore & Associates (UK) Ltd.
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