GB628562A - Improvements in or relating to grid structures for electron discharge devices - Google Patents

Improvements in or relating to grid structures for electron discharge devices

Info

Publication number
GB628562A
GB628562A GB21014/46A GB2101446A GB628562A GB 628562 A GB628562 A GB 628562A GB 21014/46 A GB21014/46 A GB 21014/46A GB 2101446 A GB2101446 A GB 2101446A GB 628562 A GB628562 A GB 628562A
Authority
GB
United Kingdom
Prior art keywords
wires
grid
groups
ring
electron discharge
Prior art date
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
GB21014/46A
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 PLC filed Critical Standard Telephone and Cables PLC
Publication of GB628562A publication Critical patent/GB628562A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/38—Control electrodes, e.g. grid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0015—Non-sealed electrodes

Landscapes

  • Electron Tubes For Measurement (AREA)

Abstract

628,562. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. July 13, 1946, No. 21014. Convention date, Oct. 3, 1945. [Class 39 (i)] In an electron discharge device of the type in which the cathode, grid and anode are mounted upon annular rings spaced apart by glass collars forming part of the envelope, the grid structure comprises three or more groups of grid wires fixed to an annular ring. The wires of each group are nested one within the other and bent in a plane at an angle of 360 degrees/n, where n is the number of groups, and are fixed to the ring at their ends only, the bent portions of the wires being left unsupported, so that deformation of the grid wires out of their plane due to thermal effect is eliminated. As shown, four groups 16-19, of nested wires are. mounted on the ring 10. The emitting coating on the cathode is omitted from that portion opposite the central space 20. The Specification as open to inspection under Sect. 91 comprises also a grid made of radial inwardly-extending wires. This subject-matter does not appear in the Specification as accepted.
GB21014/46A 1945-10-03 1946-07-13 Improvements in or relating to grid structures for electron discharge devices Expired GB628562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US628562XA 1945-10-03 1945-10-03

Publications (1)

Publication Number Publication Date
GB628562A true GB628562A (en) 1949-08-31

Family

ID=22045277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21014/46A Expired GB628562A (en) 1945-10-03 1946-07-13 Improvements in or relating to grid structures for electron discharge devices

Country Status (1)

Country Link
GB (1) GB628562A (en)

Similar Documents

Publication Publication Date Title
GB548235A (en) Improvements in cathode ray tubes
GB628562A (en) Improvements in or relating to grid structures for electron discharge devices
GB768747A (en) Improvements in or relating to devices for reproducing coloured television images
GB766005A (en) Electron discharge devices
GB555231A (en) Electron discharge devices
GB708216A (en) Improvements in and relating to magnetrons
CH299126A (en) Deflection coil assembly for cathode ray tubes.
GB644583A (en) Electron beam tube
FR1065244A (en) Microscope comprising a diaphragm having an opaque central portion of variable diameter
GB724268A (en) Improvements in or relating to multi-cavity anode structures for magnetrons
AU150450B2 (en) High efficiency cathode ray deflection systems
GB907893A (en) Improvements in electron tubes
GB592109A (en) Improvements in or relating to bases for electron discharge devices
GB662567A (en) Improvements in or relating to electron discharge devices
CA464341A (en) Cathode grid assembly for cathode ray tubes
GB579965A (en) Improvements in the manufacture of cathode-ray tubes
GB836475A (en) Low stress electrodeposited rhodium
GB522496A (en) Improvements in or relating to thermionic valves
GB744769A (en) Electron power tube
CA464375A (en) Cathode assembly for electron discharge devices
GB716376A (en) Improvements in or relating to vapour electric arc converters
GB558336A (en) Improvements relating to electric devices having an enclosing envelope
GB528458A (en) Improvements in or relating to electron discharge tubes
DK78614C (en) Cathode ray tubes.
GB620312A (en) Improvements in or relating to electron discharge devices