"Roentgen" induction coils and other X-ray apparatus (1904) (14755345124)

Identifier: roentgeninductio1904jame (find matches)
Title: "Roentgen" induction coils and other X-ray apparatus
Year: 1904 (1900s)
Authors: James G. Biddle Company
Subjects: X-rays Induction coils Radiography
Publisher: Philadelphia : James G. Biddle
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School



Text Appearing Before Image:
FlGURK 16 Direct Current Motor-Generators. THE Motor-Generator above shown is designed to transform theno, 220 or 500 volts direct current down to 20 volts directcurrent, which latter current is the one supplied directly to the in-duction coil. When the comparatively low voltage sup-Little Inverse .. j . ,,, , . • r j x xi_ plied by one of these machines is fed to the induction coil the inverse discharge withits annoying blackening of tubes is at a minimum as well as thecurrent consumed from the service mains. The economy of maintenance accompanying the use of a motor-generator over that obtained with storage batteries should be seri-ously considered when the mechanical interrupter is installed. Prices. B3070. To operate from no volts direct current $125.00 B3071. 220 «« 132.50 B3072. » 500 * 140.00 Each one has secondary output of 10 amperes at 20 volts. James G. Kiddle, 1114 Chestnut Street, Philadelphia. 3» Motor-Generators.
Text Appearing After Image:
HOLTZER-CABOT ELECTRIC CO. BOSTON, MASS. Figure 17. Alternating Current Motor-Generators. A SATISFACTORY and reliable alternating current motor-generator is necessary when the alternating current is to beused in conjunction with a mechanical or other direct current inter-rupter. We recommend the form here shown as thoroughly reliable andsatisfactory. It transforms the commercial alternating current to 20 voltsdirect current, furnishing the same kind of current to be used in theinduction coil as is delivered by the direct current motor-generatorshown on the preceding page. In ordering an alternating current motor-generator it is neces-sary to specify the voltage and frequency of the alternating current to be used. Prices. Commercial Voltage. Secondary Voltage. Watts Output. Price. B3073. no B3074. 220 B3075. noB3076. 220 20202020 175175 275275 $225.0024O.OO260.00275.00 32 James Q. Biddle, 1114 Chestnut Street, Philadelphia. Storage Batteries.