Identifier: practicalpointsi00judd (find matches)
Title: Practical points in the use of X-ray and high-frequency currents
Year: 1909 (1900s)
Authors: Judd, Aspinwall
Subjects: X-rays Electrotherapeutics Radiography X-Rays Radiography
Publisher: New York : Rebman Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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Fig. 1.—Represents a Toepler-Holtz Machine. A represents thestationary glass circle having the white paper with the tin foil stripS attached to it; B represents the brush connected with the tinfoil strip on the stationary circle; C represents the neutralizingbrush, D the revolving circle, F one of the metal sectors on therevolving circle. The terminals G G are where the current istaken off from the revolving circle. a machine of less than twelve plates, radio-graphic work, involving hips, shoulders and vis-cera, can not be done; but with a machine ofeight plates, fair treatment work can be accom- The Static Machine 9 plished. The composition plate machine de-pends upon great velocity of revolution for theproduction of the current. Consequently alarger motor is required for efficient work, andthe cost of running same is materially increased.
Text Appearing After Image:
Fig. 2.—Represents a Holtz Machine. A represents a stationaryplate, having the paper armature B. C represents a neutraliz-ing comb, D, a collecting comb from which the current is con-ducted to the sliding rods of the main machine. E represents therevolving circle. If this feature is not a consideration, very satis-factory work can be done with these machines.A further description of the composition platemachine is essentially that of the glass plate,and can be omitted. 10 X-Ray and High-Frequency Currents The Glass Plate Machine In this country the Wimshurst is not manu-factured for therapeutic purposes, but the pre-vailing types are the Holtz and the Toepler-Holtz. The latter is self-exciting and provesattractive to some on that account. If a Holtzand a Toepler-Holtz have equal areas of revolv-ing surface, the output of current will be greaterfrom the Holtz; when in action the Holtzmachine will not change polarity, which theToepler-Holtz is liable to do, especially whenunder a heav

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