GB753507A - Improvements in or relating to electron gun assemblies for electric discharge devices - Google Patents

Improvements in or relating to electron gun assemblies for electric discharge devices

Info

Publication number
GB753507A
GB753507A GB2647453A GB2647453A GB753507A GB 753507 A GB753507 A GB 753507A GB 2647453 A GB2647453 A GB 2647453A GB 2647453 A GB2647453 A GB 2647453A GB 753507 A GB753507 A GB 753507A
Authority
GB
United Kingdom
Prior art keywords
cathode
sheets
mica
modulator
flange
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
GB2647453A
Inventor
Michael Duke Dudley
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2647453A priority Critical patent/GB753507A/en
Publication of GB753507A publication Critical patent/GB753507A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

753,507. Electron beam apparatus. GENERAL ELECTRIC CO., Ltd. Sept. 27, 1954 [Sept. 25, 1953], No. 26474/53. Class 39 (1). An electron gun comprises two spaced sheets of insulating material and provided with two locating holes one for the cathode, the other for the modulator, a third electrode being located on the edges of the sheets. The cathode is a flat metal tube 1 with a doubled heater coil 3 and an emissive area 2, and it extends through deformed slots 5 in rectangular mica sheets 6. The cathode terminal tag extends through a hole in the hollow nickel cylindrical housing 13 which supports the sheets 6. The modulator 8 is a shallow circular dish, with its flange 9 corrugated and held in a rectangular slot in each mica. The anode is a tapering nickel cylinder 23 bent to form a rim 27 and a flange 26 which is welded to a similar flange 15 on the housing 13. The mica sheets are held in position against the anode 23 by a spring 19 welded to the bottom of the housing 13 and bearing against the ends 16 of the sheets. A triangular mica sheet 28 aligned with the flange 15, 26 is secured to the cathode end of the housing 13, holes being formed for the supporting rods. The modulator is degassed by heating by electron bombardment, utilizing the large area of the cathode. A second emissive coating may be provided on the underside of the cathode and combined with further electrodes held in the mica sheets to form an auxiliary thermionic valve, and one or more additional electrodes may be supported alongside the modulator 8 and anode 23. These auxiliary electrodes may be degassed by electron bombardment, the cathode having a surplus of emissive material for the purpose. Dimensions are given in the Specification.
GB2647453A 1953-09-25 1953-09-25 Improvements in or relating to electron gun assemblies for electric discharge devices Expired GB753507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2647453A GB753507A (en) 1953-09-25 1953-09-25 Improvements in or relating to electron gun assemblies for electric discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2647453A GB753507A (en) 1953-09-25 1953-09-25 Improvements in or relating to electron gun assemblies for electric discharge devices

Publications (1)

Publication Number Publication Date
GB753507A true GB753507A (en) 1956-07-25

Family

ID=10244212

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2647453A Expired GB753507A (en) 1953-09-25 1953-09-25 Improvements in or relating to electron gun assemblies for electric discharge devices

Country Status (1)

Country Link
GB (1) GB753507A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905848A (en) * 1957-10-18 1959-09-22 Philco Corp Cathode ray tube gun structure
FR2464556A1 (en) * 1979-08-29 1981-03-06 Rca Corp MULTI-BEAM ELECTRON CANON FOR CATHODE RAY TUBE
CN114622803A (en) * 2022-01-20 2022-06-14 杭州安可智控科技有限公司 Gate-controlled magnetic suspension driving device and manufacturing method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905848A (en) * 1957-10-18 1959-09-22 Philco Corp Cathode ray tube gun structure
FR2464556A1 (en) * 1979-08-29 1981-03-06 Rca Corp MULTI-BEAM ELECTRON CANON FOR CATHODE RAY TUBE
CN114622803A (en) * 2022-01-20 2022-06-14 杭州安可智控科技有限公司 Gate-controlled magnetic suspension driving device and manufacturing method thereof
CN114622803B (en) * 2022-01-20 2024-05-24 杭州安可智控科技有限公司 Door control magnetic suspension driving device and manufacturing method

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