GB493882A - Cathode ray tube - Google Patents

Cathode ray tube

Info

Publication number
GB493882A
GB493882A GB1103837A GB1103837A GB493882A GB 493882 A GB493882 A GB 493882A GB 1103837 A GB1103837 A GB 1103837A GB 1103837 A GB1103837 A GB 1103837A GB 493882 A GB493882 A GB 493882A
Authority
GB
United Kingdom
Prior art keywords
cathode
disc
respect
anode
potential
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
GB1103837A
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
Priority to US676078A priority Critical patent/US2081942A/en
Application filed by Individual filed Critical Individual
Priority to GB1103837A priority patent/GB493882A/en
Publication of GB493882A publication Critical patent/GB493882A/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
    • 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
    • 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
    • H01J29/48—Electron guns
    • H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes

Abstract

493,882. Cathode-ray tubes. LUBCKE, H. R. April 17, 1937, No. 11038. [Class 39 (i)] The grid 13 of a cathode-ray tube is in the form of a truncated cone with its apex towards the cathode. The cathode is in the form of two coaxial cylinders 5, 6 connected by a conical surface 7, being supplied with heating current through leads 9, 11 ; it is so proportioned that the resistances from the junction of the surfaces 6, 7 to either lead is the same, and the interior of the cylinder 6 is coated with emissive substances, the rear end of the cylinder being either open, or closed and similarly coated. The grid 13 is shaped as shown and is at an average potential negative with respect to the cathode. A tubular anode 17, surrounded by a disc 16 is followed by an annular disc 18, at a negative potential with respect to the anode. The deflecting plates are arranged to diverge and the first pair 22, 23 are only sufficiently broad to prevent disturbance by their edge effects. Fig. 2 shows a modification in which the disc 18 is replaced by a tube and disc 51 and a conical electrode 49, the electrodes 13, 49 being connected together and the electrode 51 being at half the potential of the anode 15 with respect to the cathode.
GB1103837A 1933-06-16 1937-04-17 Cathode ray tube Expired GB493882A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US676078A US2081942A (en) 1933-06-16 1933-06-16 Cathode ray tube
GB1103837A GB493882A (en) 1937-04-17 1937-04-17 Cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1103837A GB493882A (en) 1937-04-17 1937-04-17 Cathode ray tube

Publications (1)

Publication Number Publication Date
GB493882A true GB493882A (en) 1938-10-17

Family

ID=9978886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1103837A Expired GB493882A (en) 1933-06-16 1937-04-17 Cathode ray tube

Country Status (1)

Country Link
GB (1) GB493882A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2205162A1 (en) * 1971-02-05 1972-08-10 Hitachi Ltd Electron gun

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2205162A1 (en) * 1971-02-05 1972-08-10 Hitachi Ltd Electron gun

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