FR848180A - Cathode ray apparatus - Google Patents

Cathode ray apparatus

Info

Publication number
FR848180A
FR848180A FR848180DA FR848180A FR 848180 A FR848180 A FR 848180A FR 848180D A FR848180D A FR 848180DA FR 848180 A FR848180 A FR 848180A
Authority
FR
France
Prior art keywords
cathode ray
ray apparatus
cathode
ray
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
Other languages
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR848180A publication Critical patent/FR848180A/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
    • H01J29/66—Magnetic lenses using electromagnetic means only
FR848180D 1938-11-18 1938-12-30 Cathode ray apparatus Expired FR848180A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB42338A GB521439A (en) 1938-11-18 1938-11-18 Focussing magnets for cathode ray tubes

Publications (1)

Publication Number Publication Date
FR848180A true FR848180A (en) 1939-10-24

Family

ID=9704087

Family Applications (1)

Application Number Title Priority Date Filing Date
FR848180D Expired FR848180A (en) 1938-11-18 1938-12-30 Cathode ray apparatus

Country Status (3)

Country Link
FR (1) FR848180A (en)
GB (1) GB521439A (en)
NL (1) NL54993C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2533687A (en) * 1949-05-27 1950-12-12 Quam Nichols Company Magnetic focusing device
US2533689A (en) * 1950-06-28 1950-12-12 Quam Nichols Company Magnetic focusing device
US2533688A (en) * 1950-01-31 1950-12-12 Quam Nichols Company Focusing device
US2592185A (en) * 1950-12-09 1952-04-08 Quam Nichols Company Focusing device
US2606301A (en) * 1949-02-24 1952-08-05 Pye Ltd Magnetic focusing device for cathode-ray tubes
DE893100C (en) * 1941-03-27 1953-10-12 Siemens Reiniger Werke Ag Electric discharge tubes, in particular X-ray tubes
DE943548C (en) * 1944-05-31 1956-05-24 Siemens Ag Electron microscope with two permanently magnetically excited imaging lenses

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594099A (en) * 1950-04-22 1952-04-22 Ite Circuit Breaker Ltd Focusing coil for cathode-ray tubes
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
US2580606A (en) * 1951-03-21 1952-01-01 Best Mfg Company Inc Cathode-ray tube focusing device
GB0912332D0 (en) * 2009-07-16 2009-08-26 Vg Systems Ltd Magnetic lens,method for focussing charged particles and charged particle energy analyser
EP2827357A1 (en) 2013-07-18 2015-01-21 Fei Company Magnetic lens for focusing a beam of charged particles

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE893100C (en) * 1941-03-27 1953-10-12 Siemens Reiniger Werke Ag Electric discharge tubes, in particular X-ray tubes
DE943548C (en) * 1944-05-31 1956-05-24 Siemens Ag Electron microscope with two permanently magnetically excited imaging lenses
US2606301A (en) * 1949-02-24 1952-08-05 Pye Ltd Magnetic focusing device for cathode-ray tubes
US2533687A (en) * 1949-05-27 1950-12-12 Quam Nichols Company Magnetic focusing device
US2533688A (en) * 1950-01-31 1950-12-12 Quam Nichols Company Focusing device
US2533689A (en) * 1950-06-28 1950-12-12 Quam Nichols Company Magnetic focusing device
US2592185A (en) * 1950-12-09 1952-04-08 Quam Nichols Company Focusing device

Also Published As

Publication number Publication date
NL54993C (en) 1943-08-16
GB521439A (en) 1940-05-22

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