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US 5,095,192 AGranted
High temperature diffusion furnace
AssigneeThermtec, Inc.
InventorsWilliam D. McEntire, Ronald E. Erickson
Life of this patent
Estimating the term…
Abstract
The furnace 70 includes a heating element 72 which is restrained from growth during operation of the furnace 70 by retaining spacers 84 which provide a yoke 88 around the individual coils 102 of the heating element 72 and which spacers 84 are interlocked with each other. A high alumina fiber insulation 180 is applied to insulate the heating element 72. This high alumina fiber insulation 180 has enhanced properties with respect to shrinkage and devitrification.
Claims9
A heating element retention spacer for an electric furnace having an exposed elongate electric heating element, a spacer comprising;
- a first yoke means adapted for providing a yoke about an elongate heating element in order to retain the elongate heating element and to hold the position of an elongate heating element relative to a furnace;
- a second interlocking means for interlocking said spacer to anther of said spacer in a direction which is substantially across a direction of elongation of the elongate heating element;
- and
- wherein the first yoke means is for additionally cooperating with the second interlocking means in order to retain the elongate heating element and to hold the position of the heating elongate element relative to a furnace, whereby said spacer can cooperate with another of said spacer for retaining and holding the elongate heating element and simultaneously leaving the elongate heating element exposed.
1 more element
Dependencies are inferred from the claim text.