Heat treating furnace with load control for fan motor

Details Heat treating furnace with load control for fan motor Heat treating furnace with load control for fan motor

1977-11-03

1979-02-27

McGlynn, Joseph H.

Metallurgical apparatus

With control means responsive to sensed condition

236 15BF, 266 89, 417280, 432205, C21D 176, F27D 1900

Patent

active

041415396

ABSTRACT:
Gas is circulated within the chamber of a heat treating furnace by a fan which is driven by an electric motor. The current drawn by the motor is detected and, when the current exceeds a predetermined magnitude, the density of the gas in the chamber is reduced to prevent an excessive load from being imposed on the motor. The density of the gas is reduced by shutting off the flow of gas to the chamber and by exhausting gas from the chamber.

REFERENCES:
patent: 3380650 (1968-04-01), Drummond et al.
patent: 4080110 (1978-03-01), Szymaszek

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