The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1977
Filed:
Oct. 28, 1975
Alfred von Walter, Munich, DT;
Steigerwald Strahltechnik GmbH, Munich, DT;
Abstract
A beam current control device in a technical corpuscular beam apparatus for welding, cutting, boring, melting, hardening and like operations, wherein a corpuscular beam emitted by a beam gun is switched between an active position in which it impinges on the work-piece and a rest position in which at least its major portion does not impinge on the work-piece, comprises means for measuring the gun emission current, means for measuring the beam current impinging on the work-piece when the beam is switched from said rest into said active position, means for forming a quotient signal corresponding to the quotient of said emission current and said beam current, means for producing a reference signal, means for deriving an error signal from said quotient and reference signals, and control means responsive to said error signal to control said emission current in a sense to minimize said error signal.