Electric heating – Metal heating – By arc
Patent
1975-10-28
1977-05-03
Reynolds, Bruce A.
Electric heating
Metal heating
By arc
B23K 900
Patent
active
040216365
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.
REFERENCES:
patent: 3479483 (1969-11-01), Boring et al.
patent: 3547074 (1970-12-01), Hirschfeld
patent: 3838313 (1974-09-01), Anderson
patent: 3875366 (1975-04-01), VON Walter
Paschall Mark
Reynolds Bruce A.
Steigerwald Strahltechnik GmbH
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