Industrial electric heating furnaces – Resistance furnace device – With heating element detail
Patent
1981-06-22
1984-01-10
Envall, Jr., Roy N.
Industrial electric heating furnaces
Resistance furnace device
With heating element detail
373112, 373137, F27D 1100, H05B 300
Patent
active
044256604
ABSTRACT:
The present invention is directed to graphite shields (or shields of other materials which may react chemically or be oxidized in a vacuum furnace but which when condensed do not readily conduct electricity) or graphite shield liners used to protect electrical insulating devices from having electrical shorting path means develop thereon.
REFERENCES:
patent: 4259538 (1981-03-01), Jones
Cleaver William E.
Envall Jr. Roy N.
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