GB665230A - Improvements relating to cathode ray tubes - Google Patents

Improvements relating to cathode ray tubes

Info

Publication number
GB665230A
GB665230A GB17917/49A GB1791749A GB665230A GB 665230 A GB665230 A GB 665230A GB 17917/49 A GB17917/49 A GB 17917/49A GB 1791749 A GB1791749 A GB 1791749A GB 665230 A GB665230 A GB 665230A
Authority
GB
United Kingdom
Prior art keywords
ring
focusing assembly
ray tubes
magnetic focusing
cathode
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
GB17917/49A
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.)
Ferguson Radio Corp Ltd
Original Assignee
Ferguson Radio Corp 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 Ferguson Radio Corp Ltd filed Critical Ferguson Radio Corp Ltd
Priority to GB17917/49A priority Critical patent/GB665230A/en
Priority to US172322A priority patent/US2579941A/en
Publication of GB665230A publication Critical patent/GB665230A/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
    • H01J29/54—Arrangements for centring ray or beam

Abstract

665,230. Cathode-ray tubes. FERGUSON RADIO CORPORATION, Ltd., and LOCKYER, J. S. July 5, 1950 [July 6, 1949], No. 17917/49. Class 39 (i). Centering of an image on a cathode-ray tube screen is effected by a magnetic ring 21 adjustable in two directions at right angles relative to the axis of an adjacent and fixed magnetic focusing assembly 11 by a single control member 25. The member 25 operates a leadscrew 24 to traverse the ring across an intermediate supporting member 15 and also transversely adjusts the supporting member 15 and ring about a fixed pivot 14 on the magnetic focusing assembly. A bracket 18 resiliently clamps the intermediate member 15 after adjustment against a mounting ring secured to the magnetic focusing assembly.
GB17917/49A 1949-07-06 1949-07-06 Improvements relating to cathode ray tubes Expired GB665230A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB17917/49A GB665230A (en) 1949-07-06 1949-07-06 Improvements relating to cathode ray tubes
US172322A US2579941A (en) 1949-07-06 1950-07-06 Cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17917/49A GB665230A (en) 1949-07-06 1949-07-06 Improvements relating to cathode ray tubes

Publications (1)

Publication Number Publication Date
GB665230A true GB665230A (en) 1952-01-16

Family

ID=10103518

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17917/49A Expired GB665230A (en) 1949-07-06 1949-07-06 Improvements relating to cathode ray tubes

Country Status (2)

Country Link
US (1) US2579941A (en)
GB (1) GB665230A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL165991B (en) * 1950-12-15 Stork Conrad Bv DEVICE FOR GUIDING THIS BODY WHEN LOWERING A BODY HANGING FROM CABS.

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB504802A (en) * 1937-11-01 1939-05-01 Frederick Hermes Nicoll Improvements in or relating to permanent magnet devices for producing axially symmetrical magnetic fields
US2234720A (en) * 1939-08-10 1941-03-11 Gen Electric Electron discharge apparatus
US2416687A (en) * 1944-03-30 1947-03-04 Bell Telephone Labor Inc Magnetic focussing device
US2418487A (en) * 1944-03-31 1947-04-08 Bell Telephone Labor Inc Cathode ray magnetic focusing device
US2443973A (en) * 1945-01-05 1948-06-22 Avco Mfg Corp Control device for cathode-ray focusing coils
US2456399A (en) * 1945-10-24 1948-12-14 Gen Electric Cathode-ray apparatus
NL70293C (en) * 1945-10-31
US2501516A (en) * 1947-12-31 1950-03-21 Gen Electric Deflecting and focusing device for cathode-ray apparatus
US2521061A (en) * 1948-03-18 1950-09-05 Motorola Inc Combined focus and centering control 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

Also Published As

Publication number Publication date
US2579941A (en) 1951-12-25

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