. Principles of electro-medicine, electro-surgery and radiology : a practical treatise for students and practioners, with chapters on mechanical vibration and blood pressure technique . A\ACALASTER,W!GGIN CO. Fig. 58—Oscilloscope. rents are employed, not exceeding about two milliamperes, if it is in thecircuit, it will effectively cut out the inverse current. The best rectifying action will be obtained when an adjustable pointforms the positive pole of the gap and a plate the negative, because thecurrent flows more easily from point to plate. The spark-gap is as goodas a valve tube for most th
. Principles of electro-medicine, electro-surgery and radiology : a practical treatise for students and practioners, with chapters on mechanical vibration and blood pressure technique . A\ACALASTER,W!GGIN CO. Fig. 58—Oscilloscope. rents are employed, not exceeding about two milliamperes, if it is in thecircuit, it will effectively cut out the inverse current. The best rectifying action will be obtained when an adjustable pointforms the positive pole of the gap and a plate the negative, because thecurrent flows more easily from point to plate. The spark-gap is as goodas a valve tube for most therapeutic work, and does not become wornout, the only objection to its use is that it not only offers a resistance tothe inverse current, but also to the current which produces the properray in the tube. lnterrupterless Transformers Interrupterless transformers consist essentially of a step-up trans-former and a high tension rectifier which converts the high tension al-ternating current, generated by the transformer, into a pulsating directcurrent, which is fed to the X-ray tube. The step-up transformer is wound for voltages up to 160,000, accordingto the size and Fig. 59—Valve Tube. Electro-Medicine, Electro-Surgery and Radiology HI The high tension rectifier consists of a revolving disc mounted on theshaft of the rotary converter (if the machine is to be operated on thedirect current), or a synchronous motor (if for alternating current).When this disc revolves on the motor shaft, the two metal contacts onthe disc (which are connected to the high tension alternating current)alternately pass the stationary electrodes fixed near the revolving stationary electrodes collect the converted current, which is fedto the X-ray tube. (Fig. 75)
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1917
