"Roentgen" induction coils and other X-ray apparatus (1903) (14570493930)

Identifier: roentgeninductio1903jame (find matches)
Title: "Roentgen" induction coils and other X-ray apparatus
Year: 1903 (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:
Figure 9. Roentgen Three-Anode Electrolytic Interrupter. THIS form of the electrolytic interrupter is designed to be placedsome distance away from the coil itself. Each of the three anodeshas its corresponding point on a three-point switch, mountedupon the coil so that the operator may use any one at his pleasure. Whenthe anodes are adjusted to carry different amounts of current the char-acter of the discharge from the coil can be changed readily from lightto heavy and vice versa by simply changing the position of the switch.This modification is, in every other respect, like the usual form whichis made with but one anode. B3061. Price,Three Anode Electrolytic Interrupter $90 00 James G. Biddle, 1114 Chestnut Street, Philadelphia. Series Spark Gap.
Text Appearing After Image:
Figure 10. Roentgen Series Spark Gap. THE well known phenomenon of the inverse discharge of theinduction coil, makes it advisable to use some form of resistancein series with the terminal of the induction coil and the X-Raytube, to prevent the inverse discharge from going through the tube.When this inverse discharge is permitted to pass through the tube, ablackening of the inner walls of the tube occurs and is attributed tothe deposition of the metal of the electrodes upon the glass.Ho It! Used ^^^ most practical form of resistance has been found to be a spark gap placed in series with theterminal of the induction coil and the tube, as the inverse dischargeoften is of sufficient voltage to jump across the resistance of an inch ofair or more. If the series spark gap is greater than the distancethrough which the inverse discharge will jump, it cannot pass into thetube and blacken it. This form of Series Spark Gap is the evolution of the work ofseveral years in the attempt to obtain some