Patent · US Expired

Method and apparatus for monitoring the melting process in vacuum arc furnaces

US4435818A · kind A · utility

6Cited by

2References

10Claims

0Family size

Assignee

Leybold-Heraeus GmbH · DE

Inventors

Otto W. Stenzel · Zöblitz, DE
Pierre Flecker · Alzenau, DE

Key dates

Filing date	May 25, 1982
Grant date	Mar 6, 1984
Priority date	—
Expiry date	May 25, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/25
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

A method and apparatus for vacuum arc furnaces monitors the arc by spectrum analysis of the arc's light obtained with a radiation receiver. Upon the occurrence of spectrum lines indicating vaporization of the crucible material, the melting process is stopped or adjusted to extinguish the arc burning on the crucible which vaporized the crucible material for the spectrum analysis.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.