Electric heating – Heating devices – With heating unit structure
Patent
1994-10-06
1996-09-24
Jeffery, John A.
Electric heating
Heating devices
With heating unit structure
219528, 219505, 219544, 338214, 338259, 174108, H05B 300
Patent
active
055587941
ABSTRACT:
A coaxial heating cable comprising a central electrically conductive heating core is formed from a conductor having a resistance with a positive temperature coefficient of at least 30% at 20.degree. C. An electrically insulating polytetrafluoroethylene sheath surrounds the core, and an outer electrically conductive ground shield encloses the sheath. The ground shield comprises a number of contiguous strands which are helically wound in a single layer around the sheath. The cable preferably has a maximum diameter of 1 mm and the conductive core conveniently has a resistivity of between 0.4 ohmsm.sup.-1 and 2 ohmsm.sup.-1. The heating cable may be used in under-carpet heating. The invention extends to a method of forming a coaxial heating cable.
REFERENCES:
patent: 294148 (1884-02-01), Pope
patent: 2140270 (1938-12-01), Potter
patent: 2529914 (1950-11-01), Challenner
patent: 2790053 (1957-04-01), Peterson
patent: 3010007 (1961-11-01), Theodore et al.
patent: 3355544 (1967-11-01), Costley et al.
patent: 3364335 (1968-01-01), Palatini et al.
patent: 3665095 (1972-05-01), Seguin
patent: 3676576 (1972-07-01), Dubernet et al.
patent: 3683103 (1972-08-01), Mancino
patent: 3764779 (1973-10-01), Kadoya et al.
patent: 3789130 (1974-01-01), Parker
patent: 3790697 (1974-02-01), Buckingham
patent: 3861029 (1975-01-01), Smith-Johannsen et al.
patent: 3939299 (1976-02-01), Raw et al.
patent: 4028660 (1977-06-01), Pitts, Jr.
patent: 4200973 (1980-05-01), Farkas
patent: 4319952 (1982-03-01), Schjeldahl
patent: 4380986 (1983-04-01), Latsch et al.
patent: 4429215 (1984-01-01), Sakai et al.
patent: 4507546 (1985-03-01), Fortune et al.
patent: 4551619 (1985-11-01), Lefebvre
patent: 4591839 (1986-05-01), Charboneau et al.
patent: 4629869 (1986-12-01), Bronnvall
patent: 4638114 (1987-01-01), Mori
patent: 5057812 (1991-10-01), Yukawa et al.
patent: 5111032 (1992-05-01), Batlimalla et al.
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