Crucible

Details Crucible Crucible

1987-04-06

1988-04-26

Envall, Jr., Roy N.

Industrial electric heating furnaces

Resistance furnace device

With heating element detail

H05B 300

Patent

active

047409916

ABSTRACT:
A crucible of a resistive material has a smoothly rounded inner bottom and a radially outer portion of the outer bottom having a rounded shape. The shape of the outer bottom bears a predetermined relationship to the shape of the inner bottom. In one embodiment of the invention, the outer bottom and inner bottom have a common radius of curvature, whereby the thickness of material between the outer and inner bottom is constant. In a second embodiment of the invention, the centers of curvature differ, whereby the resistivity of material at differing radii is tailored.

REFERENCES:
patent: 4403955 (1983-09-01), Sarno

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