Mineral insulated parallel-type heating cables

Details Mineral insulated parallel-type heating cables Mineral insulated parallel-type heating cables

1986-12-29

1988-04-19

Shaw, Clifford C.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219536, 219539, H05B 306, H05B 302

Patent

active

047391553

ABSTRACT:
A mineral-insulated parallel type heating cable has at least two copper or other high conductivity busbars and a plurality of separate heating elements each confined to a zone of the cable that is short compared with its total length (e.g. around 21/2 to 5 ft). Each of the heating elements is made up of a plurality of sections of metallic high resistance material which extend longitudinally (physically parallel) and connected electrically in series, while the element as a whole is connected across the two busbars. The preform for making the cable is preferably assembled by a technique using insulating material in preformed blocks.

REFERENCES:
patent: 4626665 (1986-12-01), Fort, III
patent: 4645912 (1987-02-01), Ando et al.

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