GB515308A - Improvements in or relating to magnetic electron lenses - Google Patents

Improvements in or relating to magnetic electron lenses

Info

Publication number
GB515308A
GB515308A GB15543/38A GB1554338A GB515308A GB 515308 A GB515308 A GB 515308A GB 15543/38 A GB15543/38 A GB 15543/38A GB 1554338 A GB1554338 A GB 1554338A GB 515308 A GB515308 A GB 515308A
Authority
GB
United Kingdom
Prior art keywords
magnet
relating
electron lenses
magnetic electron
lens
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
GB15543/38A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB15543/38A priority Critical patent/GB515308A/en
Priority to US274580A priority patent/US2259531A/en
Publication of GB515308A publication Critical patent/GB515308A/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

Abstract

515,308. Cathode-ray tubes. MILLER, H., and KALLMANN, H. E. May 25, 1938, Nos. 15543 and 17360. [Class 39 (i)] In an electron lens produced by a permanent magnet M, Fig. 2, or by an electro-magnet 1, Fig. 3, a more uniform radial field gradient is. obtained by a paramagnetic member A housed within the magnet, or as in Fig. 3 by a thin shell 3 of Swedish iron preferably extending on each side of the magnet 1. The member A may be laminated or formed of dust or powder ; or a winding of iron wire may be used. The lens may be used to focus a composite electron beam or a fasciculated beam as an oscillograph. Specifications 440,560 and 472,165 are referred to.
GB15543/38A 1938-05-25 1938-05-25 Improvements in or relating to magnetic electron lenses Expired GB515308A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB15543/38A GB515308A (en) 1938-05-25 1938-05-25 Improvements in or relating to magnetic electron lenses
US274580A US2259531A (en) 1938-05-25 1939-05-19 Magnetic electron lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15543/38A GB515308A (en) 1938-05-25 1938-05-25 Improvements in or relating to magnetic electron lenses

Publications (1)

Publication Number Publication Date
GB515308A true GB515308A (en) 1939-12-01

Family

ID=10060991

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15543/38A Expired GB515308A (en) 1938-05-25 1938-05-25 Improvements in or relating to magnetic electron lenses

Country Status (2)

Country Link
US (1) US2259531A (en)
GB (1) GB515308A (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442975A (en) * 1943-08-31 1948-06-08 Rca Corp Focusing system
US2431077A (en) * 1943-08-31 1947-11-18 Rca Corp Cathode-ray tube with revolving magnets and adjustable sleeve
US2719924A (en) * 1945-12-28 1955-10-04 Oppenheimer J Robert Magnetic shims
US2581657A (en) * 1950-07-26 1952-01-08 Myron R Heppner Focusing and centering device for cathode-ray tubes
US2568668A (en) * 1950-08-18 1951-09-18 Best Mfg Co Inc Cathode-ray tube focusing device of the permanent magnet type
NL173106B (en) * 1951-12-29 Standard Oil Co Ohio CONNECTION OR CONNECTOR FOR AN ELECTROLYTIC CAPACITOR.
US2681421A (en) * 1952-03-04 1954-06-15 Gen Electric Magnetic focusing structure for electron beams
BE524061A (en) * 1952-04-08 1900-01-01
US2822500A (en) * 1952-04-08 1958-02-04 Itt Traveling wave electron discharge devices
DE1114944B (en) * 1952-06-13 1961-10-12 Siemens Ag Arrangement for the bundled guidance of an electron beam
US2825840A (en) * 1953-01-29 1958-03-04 Itt Traveling wave electron discharge devices
US2797360A (en) * 1953-03-26 1957-06-25 Int Standard Electric Corp Travelling wave amplifiers
US2844754A (en) * 1953-04-29 1958-07-22 Bell Telephone Labor Inc Electron beam focusing system
US2867745A (en) * 1953-10-07 1959-01-06 Bell Telephone Labor Inc Periodic magnetic focusing system
DE1098625B (en) * 1953-11-13 1961-02-02 Siemens Ag Magnetic bundling system for bundled guidance of one (several) electron flow (s) by means of a homogeneous magnetic field along a larger distance, especially for traveling wave tubes
NL200487A (en) * 1954-09-21
US2817038A (en) * 1954-10-15 1957-12-17 Jr John S Hickey Permanent magnet for beam tubes
US2925508A (en) * 1955-07-28 1960-02-16 Sperry Rand Corp Electron beam focusing structure
NL210816A (en) * 1955-09-22
NL214978A (en) * 1956-03-01
US2942141A (en) * 1957-06-06 1960-06-21 Bell Telephone Labor Inc Magnetic structures for traveling wave tubes
US2966609A (en) * 1957-11-22 1960-12-27 Gen Electric Magnetic structures for high frequency energy interchange apparatus
US3071709A (en) * 1960-02-10 1963-01-01 Raytheon Co Traveling wave electrical discharge device
US3134925A (en) * 1960-09-12 1964-05-26 Westinghouse Electric Corp Magnetic structure for providing smooth uniform magnetic field distribution in traveling wave tubes
US5382936A (en) * 1992-06-02 1995-01-17 The United States Of America As Represented By The Secretary Of The Army Field augmented permanent magnet structures
DE60235636D1 (en) * 2002-12-17 2010-04-22 Integrated Circuit Testing it this lens, and manufacturing method for this lens

Also Published As

Publication number Publication date
US2259531A (en) 1941-10-21

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