The Cathode Ray Oscillograph

System Technical Journal January, 1932 By J. B. JOHNSON The Cathode Ray Oscillograph * The cathode ray oscillograph, since its invention by Braun, has developed along three lines. The major types of tubes are the high voltage tubes with a fluorescent screen, the high voltage tubes with internal photographic equipment, and the low voltage tubes. This paper follows the structural development of commercial tubes. The operation of the tubes is discussed, from the standpoint of both theory and practice, with particular reference to the low voltage type of tube. Numerous examples are given of the applications of the tubes to problems in science and engineering.