GB729611A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB729611A
GB729611A GB7823/53A GB782353A GB729611A GB 729611 A GB729611 A GB 729611A GB 7823/53 A GB7823/53 A GB 7823/53A GB 782353 A GB782353 A GB 782353A GB 729611 A GB729611 A GB 729611A
Authority
GB
United Kingdom
Prior art keywords
sleeve
focusing electrode
envelope
ferromagnetic
electron
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
GB7823/53A
Inventor
Arnold Hugh William Beck
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 GB729611A publication Critical patent/GB729611A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/027—Construction of the gun or parts thereof

Abstract

729,611. Electron-beam apparatus. STANDARD TELEPHONES & CABLES, Ltd. March 20, 1953, No. 7823/53. Class 39 (1). An electron gun for the production of a high current density beam which is to be magnetically focused as for Brillouin type flow, comprises a cathode 2, a focusing electrode 4 and a. ferromagnetic disc anode pole-piece 7 within a ferromagnetic sleeve 12. An inner sleeve 8, preferably of ferromagnetic material, has two portions of different internal diameter to provide a shoulder 9 for locating the cathode and focusing electrode. An annular washer 10 of insulating material such as mica seats against the shoulder 9 and against a flange 5 on the focusing electrode. In an electron discharge tube the electrode assembly is pressed against the annular end 13 of the sleeve 12 by the rods 18 secured between a lower flange 6 of the focusing electrode 4 and the terminal pins 17. The sleeve 12 forms part of the envelope, and is preferably of an iron-nickelcobalt alloy or of a 50: 50 nickel-iron alloy for sealing to glass portions 15, 19 of the envelope. The envelope may be entirely of metal. Specification 674,758 is referred to.
GB7823/53A 1953-03-20 1953-03-20 Improvements in or relating to electron discharge devices Expired GB729611A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB319035X 1953-03-20

Publications (1)

Publication Number Publication Date
GB729611A true GB729611A (en) 1955-05-11

Family

ID=10330106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7823/53A Expired GB729611A (en) 1953-03-20 1953-03-20 Improvements in or relating to electron discharge devices

Country Status (6)

Country Link
US (1) US2764708A (en)
BE (1) BE527412A (en)
CH (1) CH319035A (en)
DE (1) DE1005199B (en)
FR (1) FR1095762A (en)
GB (1) GB729611A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961562A (en) * 1958-05-05 1960-11-22 Gen Electric Oscillation suppression in high voltage electron guns
DE1165763B (en) * 1960-02-06 1964-03-19 Telefunken Patent Cathode ray tubes with two deflection means arranged in different planes perpendicular to the tube axis
US3217200A (en) * 1962-01-23 1965-11-09 Gen Electric Internal magnetic lens for electron beams
NL296882A (en) * 1962-08-20
US3204141A (en) * 1962-08-20 1965-08-31 Kentucky Electronics Inc Electron gun

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE680284C (en) * 1932-03-17 1939-08-25 Bodo Von Borries Dr Ing Magnetic converging lens with a short field length
BE440695A (en) * 1940-03-29
US2386790A (en) * 1944-11-29 1945-10-16 Sylvania Electric Prod Electron gun and the like
US2476060A (en) * 1945-01-11 1949-07-12 Cossor Ltd A C Electron gun structure
US2436265A (en) * 1945-07-27 1948-02-17 Du Mont Allen B Lab Inc Cathode-ray tube
BE513449A (en) * 1951-08-11

Also Published As

Publication number Publication date
CH319035A (en) 1957-01-31
US2764708A (en) 1956-09-25
FR1095762A (en) 1955-06-06
DE1005199B (en) 1957-03-28
BE527412A (en)

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