Method of assembling a resistance furnace

Details Method of assembling a resistance furnace Method of assembling a resistance furnace

1974-07-30

1976-04-27

Powell, William A.

Metal working

Method of mechanical manufacture

Electrical device making

156173, 219544, H05B 318

Patent

active

039524086

ABSTRACT:
In furnaces and particularly dental furnaces it is necessary to switch the furnaces, on some considerable time before required and to keep them hot all day. The present invention enables a furnace to be constructed which can be raised to pull heat in a few minutes and be cooled off just as quickly, and comprises a muffle or muffle section having a heating element carried by a support of ceramic fibrous material and constructed by novel methods.

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