Electric heater assembly

Details Electric heater assembly Electric heater assembly

1997-06-26

1998-12-15

Walberg, Teresa J.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219535, 219543, 219544, 219553, 428615, 264635, H05B 306

Patent

active

058500723

ABSTRACT:
An improved electric heater assembly suitable for heating molten metal, the electric heater assembly having a tube comprised of a closed end suitable for immersing in the molten metal. The tube is fabricated from a composite material comprised of a metal having a coefficient of thermal expansion of less than 10.times.10.sup.-6 in/in/.degree. F. and having an outside surface to be exposed to the molten metal coated with a refractory resistant to attack by the molten metal; and an electric heater located in the tube in heat transfer relationship therewith.

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