GB729840A - Improvements in magnetic electron lenses - Google Patents

Improvements in magnetic electron lenses

Info

Publication number
GB729840A
GB729840A GB49/53A GB4953A GB729840A GB 729840 A GB729840 A GB 729840A GB 49/53 A GB49/53 A GB 49/53A GB 4953 A GB4953 A GB 4953A GB 729840 A GB729840 A GB 729840A
Authority
GB
United Kingdom
Prior art keywords
jan
adjustable
electron lenses
magnetic electron
magnets
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
GB49/53A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB729840A publication Critical patent/GB729840A/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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only

Abstract

729,840. Cathode-ray tubes. ' PHILIPS ELECTRICAL INDUSTRIES, Ltd. Jan. 1, 1953 [Jan. 4, 1952], No. 49/53. Class 39 (1). An electron lens consists of permanent magnets 1, 2 which are magnetized in the axial direction or radially. The strength of the field is adjustable by an arrangement 5 which regulates the distance between the magnets, which can be made of crystals of iron oxide and barium, strontium lead and calcium. The lens is enclosed by a screen 4 of soft iron and the electron beam is adjustable by a magnetic plate arranged on one side of a magnet. Specification 708,127, [Group XXXV], is referred to.
GB49/53A 1952-01-04 1953-01-01 Improvements in magnetic electron lenses Expired GB729840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL310959X 1952-01-04

Publications (1)

Publication Number Publication Date
GB729840A true GB729840A (en) 1955-05-11

Family

ID=19783636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49/53A Expired GB729840A (en) 1952-01-04 1953-01-01 Improvements in magnetic electron lenses

Country Status (7)

Country Link
US (1) US2849636A (en)
BE (1) BE516722A (en)
CH (1) CH310959A (en)
DE (1) DE976927C (en)
FR (1) FR1069392A (en)
GB (1) GB729840A (en)
NL (2) NL166477B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354336A (en) * 1965-06-30 1967-11-21 Zenith Radio Corp Ring magnetized across thickness with two diametrically opposed and oppositely oriented groups of magnetic pole pairs

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324433A (en) * 1963-12-27 1967-06-06 Hitachi Ltd Electron lens system excited by at least one permanent magnet
US3387158A (en) * 1965-04-14 1968-06-04 Sony Corp Focus magnet assembly for cathode ray tubes
NL7812540A (en) * 1978-12-27 1980-07-01 Philips Nv CATHED BEAM TUBE.
NL8700528A (en) * 1987-03-05 1988-10-03 Philips Nv MAGNETIC FOCUSING LENS FOR A CATHODE BEAM.
US9103398B2 (en) * 2011-09-10 2015-08-11 Honda Motor Co., Ltd. Variable damping force damper
US11483919B2 (en) * 2019-03-27 2022-10-25 Huazhong University Of Science And Technology System of electron irradiation

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2102421A (en) * 1934-07-12 1937-12-14 Gen Electric Cathode ray oscillograph
FR796502A (en) * 1934-10-19 1936-04-09 Fernseh Ag Magnet now the straight ray in the braun tubes
DE682031C (en) * 1936-09-11 1939-10-06 Aeg Rotationally symmetric magnetic electron lens made of permanent magnets
DE720927C (en) * 1937-02-25 1942-05-19 Telefunken Gmbh Magnetic electron lens
DE688644C (en) * 1937-05-29 1940-02-27 Aeg r coaxial partial lenses
GB522377A (en) * 1938-12-07 1940-06-17 Ferranti Ltd Improvements in or relating to focusing systems for electron beams
DE758548C (en) * 1939-02-10 1953-05-26 Telefunken Gmbh Magnetic electron lens without image rotation
NL147275B (en) * 1948-07-01 Plessey Uk Limited ELECTRIC TORQUE SWITCH FOR PUSH-BUTTON CONTROL.
US2582788A (en) * 1949-02-01 1952-01-15 Gen Electric Magnetic suspension for horizontal shafts
US2564737A (en) * 1949-12-23 1951-08-21 Rauland Corp Cathode-ray tube
US2615738A (en) * 1950-03-18 1952-10-28 Bailey Meter Co Linkage connector
US2565533A (en) * 1950-05-19 1951-08-28 Rauland Corp Cathode-ray tube
US2714678A (en) * 1950-09-03 1955-08-02 Siemens Ag Electron microscopes
BE503996A (en) * 1950-12-12
US2722617A (en) * 1951-11-28 1955-11-01 Hartford Nat Bank & Trust Comp Magnetic circuits and devices
NL87140C (en) * 1954-03-05

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354336A (en) * 1965-06-30 1967-11-21 Zenith Radio Corp Ring magnetized across thickness with two diametrically opposed and oppositely oriented groups of magnetic pole pairs

Also Published As

Publication number Publication date
BE516722A (en)
CH310959A (en) 1955-11-15
US2849636A (en) 1958-08-26
FR1069392A (en) 1954-07-07
NL166477B (en)
NL87342C (en)
DE976927C (en) 1964-08-06

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