Patent · US Expired

High power electron gun

US4665297A · kind A · utility

4Cited by

0References

4Claims

0Family size

Assignee

Bakish Materials Corporation · US

Inventors

Siegfried Schiller · Dresden, DE
Guenter Jaesch · Dresden, DE
Alexander von Ardenne · Dresden, DE

Key dates

Filing date	Apr 14, 1986
Grant date	May 12, 1987
Priority date	—
Expiry date	Apr 14, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH01J37/065
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A high beam power electron gun of the axial type, particularly useful in large-scale vacuum metallurgy plants for melting, vaporizing and heat treating. The electron gun is controllable over its entire power range, i.e., from 10% to 100% of its nominal power, while the focal length of its beam guidance lens is maintained unchanged. This lens is downstream of a cathode, a focusing electrode and a movable anode, and is provided on its upstream side with a pole shoe to which the anode is fastened and which, together with the anode, is movable as a single unit in the axial direction for controlling the power.

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