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
GB22355/38A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLCfiledCriticalStandard Telephone and Cables PLC
Publication of GB507270ApublicationCriticalpatent/GB507270A/en
Cathode-Ray Tubes And Fluorescent Screens For Display
(AREA)
Abstract
507,270. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. July 27, 1938, No. 22355. Convention date, July 27, 1937. [Class 39 (i)] The cathode 16, Fig. 4, has a number of straight or curved emitting surfaces opposite each of which and parallel thereto is a rod-like anode 22. Rod form control electrodes may be interposed between the cathode and anodes ; the latter may be independently connected to circuit elements or connected together. The anodes 22, Fig. 6, may be arranged inside the cathode, whch as shown has three curved emitting surfaces 25.
Improvements in or relating to circuit arrangements comprising discharge tube having atleast a cathode, a control grid, an anode andan auxiliary cathode emitting electrons under bombardment by electrons
Improvements in or relating to circuit arrangements comprising discharge tube having atleast a cathode, a control grid, an anode andan auxiliary cathode emitting electrons under bombardment by electrons