Method and means for drawing samples from melts
AssigneeLeybold-Heraeus-Verwaltung G.m.b.H.
InventorHeinrich Feichtinger
Life of this patent
Estimating the term…
Abstract
An arrangement in which samples drawn from a melt are sealed against air, and are allowed to solidify, while the gases given off are collected for analysis. A hollow, thin-walled, metallic element is used, which narrows at its lower end into an orifice. The element is degassed at high temperature before being sealed for use, to remove hydrogen and organic impurities.
Claims11
An arrangement for drawing a sample from melts comprising, in combination, a tube-shaped evacuated hollow element capable of being heated to a temperature sufficient to degass said element during evacuation, the drawn sample solidifying in said element in the absence of air;
- the gases emitted by said sample during solidification and cooling being collected quantitatively within said element;
- an orifice-shaped narrowed portion within the interior of said hollow element and in vacuum-tight communication with said drawn sample, said hollow element having a thin-walled metallic sleeve-shaped member and a covering cap;
- and metallic sealing means for sealing the exterior wall of said element vacuum tight;
- insert means within said element for subdividing the interior of said element into an upper chamber and a lower chamber, said insert means passing gases into said upper chamber and inhibiting the passage of melt through said insert means.
Dependencies are inferred from the claim text.