Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-05-20
1993-02-09
Ng, Jin F.
Communications: electrical
Condition responsive indicating system
Specific condition
338 26, G08B 1706, H01C 304
Patent
active
051855941
ABSTRACT:
A continuous temperature sensing cable formed of a polymer containing conductive and semi-conductive fillers such as polyethylene with carbon black, powdered metals and metal oxides controlled within the range of from about eight percent (8%) to about fifteen percent (15%). The composition is extruded with a pair of elongated substantially parallel conductors which are spaced apart along the longitudinal length of the cable. The conductors are single endedly connected to a control/alarm device for monitoring the continuous length of the temperature sensing cable. The control/alarm device may be a time domain reflectometer TDR for accurate determination of localized discontinuities caused by high temperatures along the length of the temperature sensing cable. Alternatively, a critical voltage may be applied single-endedly to the conductors and serially connected to an audible alarm to detect tunneling conduction when operated at a temperature near the melt temperature of the composition.
REFERENCES:
patent: 2483793 (1949-10-01), Thomas
patent: 2941192 (1960-06-01), Postal
patent: 3243753 (1966-03-01), Kohler
patent: 3823217 (1974-07-01), Kampe
patent: 3861029 (1975-01-01), Smith-Johannsen et al.
patent: 3914363 (1975-10-01), Bedard et al.
patent: 3976600 (1976-08-01), Meyer
patent: 4023412 (1977-05-01), Luke et al.
patent: 4200973 (1980-05-01), Farkas
patent: 4277673 (1981-07-01), Kelly
patent: 4327480 (1982-04-01), Kelly
patent: 4352083 (1982-09-01), Middleman et al.
patent: 4388607 (1983-06-01), Toy et al.
patent: 4400614 (1983-08-01), Sopory
patent: 4444708 (1984-04-01), Gale et al.
patent: 4543474 (1985-09-01), Horsma et al.
patent: 4547658 (1985-10-01), Crowley
patent: 4560524 (1985-12-01), Smuckler
patent: 4575620 (1986-03-01), Ishii et al.
patent: 4724417 (1988-02-01), Au et al.
patent: 4910391 (1990-03-01), Rowe
patent: 4941753 (1990-07-01), Wickramasinghe
patent: 5057673 (1991-10-01), Farkas et al.
patent: 5122641 (1992-06-01), DeChurch
Sichel, Ed., Carbon Black-Polymer Composites, the Physics of Electrically Conducting Composites, Marcel Dekker, Inc., N.Y. 1982, pp. 51-77.
Furon Company
Mullen Jr. Thomas J.
Ng Jin F.
LandOfFree
Temperature sensing cable device and method of making same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature sensing cable device and method of making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature sensing cable device and method of making same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-327633