Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB20557/29A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbHfiledCriticalTelefunken AG
Publication of GB314902ApublicationCriticalpatent/GB314902A/en
H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
Landscapes
Investigating, Analyzing Materials By Fluorescence Or Luminescence
(AREA)
X-Ray Techniques
(AREA)
Abstract
314,902. Telefunken Ges. fiir Drahtlose Telegraphie. July 4, 1928, [Convention date]. Vacuum tubes.-The discharge between a cathode K and an anode A is controlled by a deposit of lightsensitive material on the inside of the envelope, the cathode being arranged nearer to the material than to the anode.
GB20557/29A1928-07-041929-07-04Improvements in or relating to photo-electric discharge devices
ExpiredGB314902A
(en)