GB491573A - Control diaphragm for electron rays, especially for television purposes - Google Patents

Control diaphragm for electron rays, especially for television purposes

Info

Publication number
GB491573A
GB491573A GB32506/36A GB3250636A GB491573A GB 491573 A GB491573 A GB 491573A GB 32506/36 A GB32506/36 A GB 32506/36A GB 3250636 A GB3250636 A GB 3250636A GB 491573 A GB491573 A GB 491573A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
cathode
aperture
thick
electron rays
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
GB32506/36A
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.)
WALTER HEINMANN
Original Assignee
WALTER HEINMANN
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 WALTER HEINMANN filed Critical WALTER HEINMANN
Publication of GB491573A publication Critical patent/GB491573A/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
    • H01J29/48—Electron guns
    • H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

491,573. Cathode ray tubes. HEIMANN, W. Nov. 27, 1936, No. 32506. Void. Convention date, Dec. 2, 1935. [Class 39 (i)] A diaphragm in front of the cathode of a cathode-ray tube serves both to control the beam current and to be reproduced on the fluorescent screen, and has an aperture of diameter 0À5 mm. and a thickness of 0À25 mm. Preferably, the ratio of the thickness to the aperture diameter is equal to or less than 0À5. In a modification, a thin diaphragm 0À1 mm. thick is placed over the aperture in the thick diaphragm B. Alternatively, a recess may be made in the thick diaphragm on the cathode side.
GB32506/36A 1935-12-02 1936-11-27 Control diaphragm for electron rays, especially for television purposes Expired GB491573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE491573X 1935-12-02

Publications (1)

Publication Number Publication Date
GB491573A true GB491573A (en) 1938-09-05

Family

ID=6544290

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32506/36A Expired GB491573A (en) 1935-12-02 1936-11-27 Control diaphragm for electron rays, especially for television purposes

Country Status (1)

Country Link
GB (1) GB491573A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437062A1 (en) * 1978-09-25 1980-04-18 Rca Corp IMPROVEMENTS ON ELECTRONIC GUNS, ESPECIALLY FOR TELEVISION RECEIVERS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437062A1 (en) * 1978-09-25 1980-04-18 Rca Corp IMPROVEMENTS ON ELECTRONIC GUNS, ESPECIALLY FOR TELEVISION RECEIVERS

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