File:The electro-therapeutic guide, or, A thousand questions asked and answered (1907) (14593025348).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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^ PATIENT CIRCUIT.© PLAN opWIRINC OF ALUMINUM FOUR CELL RECT/FIER, This disposition of the cells was arranged by Graetz, and is an ap-plication of what is known as the Wheatstone bridge. If we pass an alternated current through an aluminum cell, as mention-ed above, we will have an almost complete and instantaneous arrest of animpulse in one direction, but there will be no change in the impulse in the 56 THE ELECTRO-THERAPEUTIC GUIDE alternate direction, and we would have an interrupted current, and it is onthis basis that the four cells of the rectifier shown in the accompanying cutare grouped so as to lead all the impulses of both alternations in the samedirection, and deliver a continuous current. NATIONAL COLLEGE SINUSOIDAL TRANSFORMERWhat is a transfofmer, and its uses?
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This apparatus is for use only with the alternating incandescent cur-rent, and can be wound to suit currents of any voltage. It consists of alarge stationary core and a thin primary winding, through which is sentthe alternating street current, which rapidly magnetizes and demagnetizesthe core, making corresponding fluctuations in the lines offeree around theprimary coil and core. By means of an endless screw, not shown in thecut above, which works with a crank, the secondary coil is moved smoothlyand easily over the primary after the sledge manner, cutting the field of thelines of force, which generates a secondary or induced current of highvoltage, having the power of producing anaesthesia, and powerful painlessmuscular contractions. By means of .another secondary of different size andlength of wire, this little coil produces a current for cautery work and forlighting exploring lamps. It is always ready, no battery to keep in order, and is as handy as thelamp that lights your office.

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