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
GB10103/44A
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 GB582021ApublicationCriticalpatent/GB582021A/en
H01J21/06—Tubes with a single discharge path having electrostatic control means only
H01J21/065—Devices for short wave tubes
Landscapes
Microwave Tubes
(AREA)
Abstract
582,021. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. May 24, 1944, No. 10103. Convention date, Dec. 24, 1942. [Class 39 (i)] The anode comprises a ring 12 surrounding the grid joined by a curved member 36 to a parallel extension 28 projecting through the envelope, and sealed thereto by knife-edges 32, 34. The axial displacement of the parts 12, 28 reduces anode-grid capacity. The grid consists of spaced tantalum wires 14 supported by a metal cylinder 23 connected to a disc 24 sealed between the glass sections 22, 26. The cathode is a filament 16 connected to spaced leads 18 and a central lead 20. In a modification, the grid connection is at the opposite end of the valve to the cathode connection; in this case the member 36 is oppositely curved so that the lead 28 is above the effective anode part 12. The invention is applicable to valves having more than one grid.
Improvements in devices having hermetically sealed envelopes through which pass more than two leading-in conductors each carrying to an electrode a current of many amperes