"Roentgen" induction coils and other X-ray apparatus (1903)
James G. Biddle Company · Philadelphia : James G. Biddle · leaf 23
sufficient voltage to jump across the resistance of an inch ofair or more. If the series spark gap is greater than the distancethrough which the inverse discharge will jump, it cannot pass into thetube and blacken it. This form of Series Spark Gap is the evolution of the work ofseveral years in the… … Figure ii. Direct Current Motor=Generators. THE Motor-Generator above shown is designed to transform theno, 220 or 500 volts direct current down to 20 volts directcurrent, which latter current is the one supplied directly to theinduction coil. Little Inverse When the comparatively low voltage…
X-rays · Induction coils · Radiography
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