GB880674A - Magnetic focusing assembly - Google Patents

Magnetic focusing assembly

Info

Publication number
GB880674A
GB880674A GB9423/60A GB942360A GB880674A GB 880674 A GB880674 A GB 880674A GB 9423/60 A GB9423/60 A GB 9423/60A GB 942360 A GB942360 A GB 942360A GB 880674 A GB880674 A GB 880674A
Authority
GB
United Kingdom
Prior art keywords
march
magnets
gap
flux
assembly
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
GB9423/60A
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 Precision Inc
Original Assignee
General Precision Inc
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 Precision Inc filed Critical General Precision Inc
Publication of GB880674A publication Critical patent/GB880674A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • H01J23/0873—Magnetic focusing arrangements with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing

Abstract

880,674. Permanent magnets. GENERAL PRECISION Inc. March 17, 1960 [March 24, 1959], No. 9423/60. Class 35. A focusing magnet assembly comprises one or more axially magnetized annular ferrite magnets 10 flanked by ferromagnetic polepieces 12, 13 which have inclined surfaces 18a so that a gap between them increases with distance from the axis of the assembly to reduce leakage flux across that gap. The main flux is designed to pass from surfaces 16 axially along an electron tube (not shown) which the assembly surrounds. A series of alternate magnets and polepieces may be mounted along a tube to produce a continuous unidirectional axial flux.
GB9423/60A 1959-03-24 1960-03-17 Magnetic focusing assembly Expired GB880674A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US801536A US3106659A (en) 1959-03-24 1959-03-24 Microwave tube construction

Publications (1)

Publication Number Publication Date
GB880674A true GB880674A (en) 1961-10-25

Family

ID=25181376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9423/60A Expired GB880674A (en) 1959-03-24 1960-03-17 Magnetic focusing assembly

Country Status (2)

Country Link
US (1) US3106659A (en)
GB (1) GB880674A (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847607A (en) * 1953-04-29 1958-08-12 Bell Telephone Labor Inc Magnetic focusing system
NL187895B (en) * 1953-06-17 Feldmuehle Ag DEVICE FOR DEININKING FIBER SUSPENSIONS.
NL200862A (en) * 1954-10-04
NL201701A (en) * 1954-11-12
GB785110A (en) * 1955-06-28 1957-10-23 Standard Telephones Cables Ltd Electron tube magnetic focusing device
NL99653C (en) * 1956-03-01
US2875273A (en) * 1956-04-25 1959-02-24 Hazeltine Research Inc Color-television projector
US2945153A (en) * 1956-08-31 1960-07-12 Rca Corp Electron beam tube
NL100798C (en) * 1958-03-12
US2957102A (en) * 1958-10-02 1960-10-18 Hughes Aircraft Co Self-aligning traveling wave tube and method

Also Published As

Publication number Publication date
US3106659A (en) 1963-10-08

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