Page "learned" Paragraph 21
from
Brown Corpus
The argon flow from commercial bottles was regulated by a pressure regulator and measured with a gas flow rator.
The power source was a commercial D. C. rectifier.
At 100 Amp the 360 cycle ripple was less than 0.5 V ( peak to peak ) with a resistive load.
The current was regulated by means of a variable resistor and measured with a 50 mV shunt and millivoltmeter.
The arc voltage was measured with a voltmeter whose terminals were connected to the anode and cathode holders.
Because of the falling characteristic of the rectifier, no ballast resistor was required for stability of operation.
A high frequency starter was used to start the arc.
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2.240 seconds.