Patent
Electric arc welding
TLDR
In this article, the high-frequency inductor or transformer disposed in the welding circuit and necessary for the injection of the highfrequency current has a core of ferrite material or powdered iron and is arranged to saturate at normal welding currents so as to offer little impedance to the flow of welding current.Abstract:
722,494. Supply systems for welding arcs. AIR REDUCTION CO., Inc. Dec. 8, 1952 [Dec. 28, 1951], No. 31074/52. Drawings to Specification. Class 38 (4). To permit the employment of a relatively low high-frequency (say 50 to 500 kcs. per sec.) current for starting and stabilizing a D.C. or low-frequency A.C. welding arc, the highfrequency inductor or transformer disposed in the welding circuit and necessary for the injection of the high-frequency current has a core of ferrite material or powdered iron and is arranged to saturate at normal welding currents so as to offer little impedance to the flow of welding current, but to be unsaturated by the high-frequency currents alone, so as to offer high impedance to these-and thus provide good injection of high-frequency currentwhen the arc extinguishes. The high-frequency generator may comprise a push-pull valve oscillator normally cut off by external bias, but triggered into oscillation by a voltage pulse induced in a winding of the injection transformer upon interruption of the flow of welding current.read more
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Method for electrical arc spot welding with consumable electrode
TL;DR: In this article, a consumable electrode with respect to a current carrying device is fixed to a surface of a part to be fused, and a welding arc is fired between the end face of the electrode and the surface of the part.
Patent
Method and Apparatus for Short-Arc Welding
TL;DR: In this paper, a short-arc welding method and apparatus is described, in which an electrically periodically changing arc, which is short-circuited periodically by a molten droplet (22) from the welding wire (21), is formed between welding wire and the base material (20).
Patent
Split stream cross orifice
TL;DR: In this paper, an electron beam welding apparatus is described in which the electron beam 12 is brought out from the evacuated electron gun chamber 10 through an opening 18 on to the workpiece 14, a housing 20 having a beam passage aperture 29 and a beam exit aperture 34 is provided to define a passageway in which a supersonic jet 36 of inert sealing gas is directed across the beam aperture 29 in such a way that a pressure gradient is established along the beam axis with the pressure increasing away from the beam passage a 29.
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Patent
Separation of the constituents of gaseous mixtures
TL;DR: In this article, a method for the liquefaction and separation of ternary gaseous mixtures for the purpose of recovering the constituents of air is described, particularly adapted for the separation of the principal constituents.
Patent
Arc welding apparatus
TL;DR: In this article, it was shown that it is desirable to avoid the inclusion of oxides and nitrides in the weld metal, since their inclusion causes hardness and brittleness and further degradation.