File:The electro-therapeutic guide, or, A thousand questions asked and answered (1907) (14799676153).jpg

Identifier: electrotherapeut00benn (find matches)
Title: The electro-therapeutic guide, or, A thousand questions asked and answered
Year: 1907 (1900s)
Authors: Bennett, Homer Clark, 1865-1928
Subjects: Electrotherapeutics Electricity in medicine Ohm's law X-rays Electricity Electricity X-Rays Electromagnetic Phenomena Electric Stimulation Therapy
Publisher: Lima (Ohio) : Literary Dept. of the National College of Electro-Therapeutics
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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ced on thethe axle or main shaft as to effectually minifj^ or prevent vibration orpounding, which must follow the revolution of an eccentric weight. There is no material used in the construction of any static machineplate which is perfectly true, or which will remain so if it could be madeso, on account of the effects of the physical conditions surrounding it,such as heat, cold, humidity, etc. If any one should tell you that such or such a machine will generateelectrification all the time, and under all conditions, without any qualifica-tion, then beware. There is none that will do it. They are selling machines, we are stating facts. Take yoiir choice.There is no question whatever among machinists about the great advantagewhich the roller bearings have over the old style ball or spindle bearings,as the difference in the cost is more than made up in the lessened frictionand strain, with the consequent decrease in expense of repairs and outlayfor power. Get the best. fIGI. FIG 2. FIG 3.
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ROLLER BEARINGS On account of the ease of operation and generation, the type of ma-chine known as the Tcepler, which is self charging, is the more preferable.Therefore, after twenty years of study of the physics and mechanism, andexperiments with nearly all the different makes and materials, and after THE EIvKCTRO-THERAPEUTIC GUIDE 131 noting and consulting with many disinterested students, experimenters andobservers, I would advise the selection and purchase of a Toepler type ofself charging machine, with all glass plates and roller bearings, set in arigid frame case, as nearly air tight as possible, as likely to prove most sat-isfactory and economical. In which direction must the plates twrn? The plates of a static machine should revolve from right to left, at thetop, or just the reverse of the direction in which the hands of a clock move.Many blunders have been made, by beginners on account of overlookingthis simple rule. How would you restore a lost charge ? If you should not have

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