| (19) |
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(11) |
EP 0 858 244 A3 |
| (12) |
EUROPÄISCHE PATENTANMELDUNG |
| (88) |
Veröffentlichungstag A3: |
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30.09.1998 Patentblatt 1998/40 |
| (43) |
Veröffentlichungstag A2: |
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12.08.1998 Patentblatt 1998/33 |
| (22) |
Anmeldetag: 19.11.1997 |
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| (51) |
Internationale Patentklassifikation (IPC)6: H05B 3/56 |
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| (84) |
Benannte Vertragsstaaten: |
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AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
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Benannte Erstreckungsstaaten: |
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AL LT LV MK RO SI |
| (30) |
Priorität: |
06.02.1997 NO 970531
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| (71) |
Anmelder: ALCATEL ALSTHOM COMPAGNIE GENERALE D'ELECTRICITE |
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75008 Paris (FR) |
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| (72) |
Erfinder: |
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- Birkeland, Tom Harald
1929 Auli (NO)
- Asper, Kare
1472 Fjellhamar (NO)
- Sommerfelt, Kristin Fagerhaug
0590 Oslo (NO)
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| (74) |
Vertreter: Mende, Eberhard, Dipl.-Ing. |
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Alcatel Alsthom,
Intellectual Property Department,
Kabelkamp 20
30179 Hannover
30179 Hannover (DE) |
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| (54) |
Feldfreies Heizkabel |
(57) The present invention relates to electrical floor heating cable and in particular
to cables generating acceptably small electromagnetic fields. The cable of the invention
has a first, near end and a second, far end and comprises within an outer protective
sheath (4) a cable core consisting of
- a central resistance conductor (1)
- a concentrical sheath of insulation material (2) surrounding the resistance conductor,
- as well as
- return conductor means (5) arranged to be interconnected with the resistance conductor
in the far end of the cable.
The return conductor means consists of at least two separate conductors (5;5a-5c;10,11;15,16,17)
which are distributed in the cable core. The return conductors are preferably embedded
in a common insulation sheath (3) arranged over the resistance conductor sheath (2).