ntric, to avoid confusion of polarity. The board may be fastened to the wall or to the table whichcarries the coil. Regulation by Shunt-Resistances.—As the working of coils from pressures of 100 volts or higher involves additional wear andtear upon tubes and interrupters, a plan which permits of… … [ FiCx. 42.—Diagram of Distributing Plugs Fig. 43.—Regulating Resist-for Motor-driven Interrupter. ance of Open Wire Spirals. 200 volts or upwards some means of reducing the pressures in thecoil circuit becomes almost a necessity. The ordinary way of using a resistance is to put it in series…
X-rays · Radiography
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