. Principles of electro-medicine, electrosurgery and radiology : a practical treatise for students and practitioners. With chapters on mechanical vibration and blood pressure technique . and neutralizing brushes. These charges are then collected bycollecting brushes, and are carried to the discharging poles or primeconductors. Machines of the Holtz and Toepler-Holtz type have a number of Electro-Medicine, Electro-Surgery and Radiology 35 stationary and a number of revolving glass plates, while in the Wims-hurst machines all the plates (which may be of glass or mica) are re-volving (some in one
. Principles of electro-medicine, electrosurgery and radiology : a practical treatise for students and practitioners. With chapters on mechanical vibration and blood pressure technique . and neutralizing brushes. These charges are then collected bycollecting brushes, and are carried to the discharging poles or primeconductors. Machines of the Holtz and Toepler-Holtz type have a number of Electro-Medicine, Electro-Surgery and Radiology 35 stationary and a number of revolving glass plates, while in the Wims-hurst machines all the plates (which may be of glass or mica) are re-volving (some in one direction and some in another). The stationary plates in the Holtz machine are made in two sections,while those in the Toepler-Holtz are circular. On the outer side of every stationary plate of the Toepler-Holtzmachine, are fastened two strips of metal, one on each side, known asfield plates (which are its inducing plates), while on every revolvingplate to the side opposite the stationary plates, are fastened small metal carriers. , , , , x t • i i Toepler-Holtz and Wmishurst machmes have neutralizmg brushes,attached at both ends of a rod, which runs diagonally throughout the. Fig. 9—Charger used to excite the Holtz machine. center of the plate. Approximating brushes make a metallic contactwith the field plates. The Holtz machine differs from the Toepler-Holtz and the Wimshurstby not having metal carriers on its revolving plates, and no neutraliz-ing brushes, and consequently it is not self-exciting, but has a specialcharger in the form of a small Wimshurst. (Fig. 9.) The Wimshurst machine, for example, has from two to thirty or moreplates of glass (or other suitable material, e. g., mica or ebonite)mounted on a horizontal axis about one-sixth of an inch apart. Thesediscs revolve, some in one direction and some in another. Each platehas a number of sectors or strips of tin foil, which serve both as induct-ors and carriers, and a metallic rod with brushes, which make contac
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