Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1992-04-10
1994-08-23
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340603, 73 40, 174 11R, G08B 2100
Patent
active
053411285
ABSTRACT:
A sensor for detecting the presence of hydrocarbons and hydrocarbon containing fluids. It is formed of a first conductor which is formed of a metal wire or metal foil covered by an insulative sheath; a second conductor which consists of a hydrocarbon swellable elastomer and one or more conductive fillers; optionally an abuse/abrasion resistant jacket overlaying and preferably surrounding the two conductors and optionally a hydrocarbon permeable overcoat overlaying the jacket. The sensor may be in the form of a continuous length wire or a tape or a sheet. It may be coupled to an electric supply at one portion and a resistance indicator at the return portion. The resistance indicator is then attached to a signaling device such as a light or alarm.
REFERENCES:
patent: 4926165 (1990-05-01), Lahlouh et al.
patent: 4972179 (1990-11-01), Akiba
patent: 5101657 (1992-04-01), Lahlouh et al.
patent: 5177996 (1993-01-01), Sahakian
Keyser Paul
Watchko George
Baker William L.
Chomerics, Inc.
Hofsass Jeffery A.
Hubbard John Dana
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