Industrial electric heating furnaces – Resistance furnace device – With heating element detail
Patent
1994-09-19
1996-03-05
Hoang, Tu
Industrial electric heating furnaces
Resistance furnace device
With heating element detail
373128, 219520, 219532, H05B 366
Patent
active
054973945
ABSTRACT:
A vacuum furnace has a heating chamber heated by metal strip electric heater elements. The elements have insulated mechanical support between their ends to hold them in position in the furnace. Support is provided by a ceramic post having an internal thread in an outer end threaded onto a rod secured to a portion of the furnace. A transverse member at an inner end of the post includes a straight surface normal to the length of the post for engaging the heater element. The heater element is compliantly connected to the straight surface. One embodiment of heater element support is in the form of a T-shaped ceramic post having an internal thread in the leg of the T and a ceramic crossbar having a straight surface normal to the length of the post for receiving the heater element. Another embodiment has a ceramic post having an internal thread in the outer end of the post and a metallic crossbar having a straight surface normal to the length of the post for receiving a heater element.
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patent: 4994654 (1991-02-01), Louis
Grier Brian K.
Grier John K.
Jhawar Suresh C.
Grier-Jhawar-Mercer, Inc.
Hoang Tu
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