Crucible assembly

Details Crucible assembly Crucible assembly

1980-09-24

1982-05-04

Envall, Jr., Roy N.

Industrial electric heating furnaces

Resistance furnace device

With heating element detail

373122, H05B 300

Patent

active

043283861

ABSTRACT:
A crucible assembly for use in an analytical furnace for the fusion of a sample includes a graphite heating crucible of cylindrical construction having one end open and an enclosed lower end with a positioning member interior to the interior cylindrical wall for receiving and positioning a separate sample holding crucible of cylindrical construction having an open upper end and an enclosed lower end. The heating crucible has an annular upper contact surface for engaging a first electrode and an annular lower contact surface for engaging a second electrode and positions the sample holding crucible in the zone of maximum heat in spaced relationship from the opposite ends of the heating crucible.

REFERENCES:
patent: 3139474 (1964-06-01), Weech
patent: 3722259 (1973-03-01), Kraus
patent: 3751965 (1973-08-01), Kraus
patent: 3812705 (1974-05-01), Boillot
patent: 3936587 (1976-02-01), Sitek
patent: 3946228 (1976-03-01), Biermann
patent: 4072814 (1978-02-01), Boillot

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