GB417850A - Braun tube - Google Patents

Braun tube

Info

Publication number
GB417850A
GB417850A GB7117/33A GB711733A GB417850A GB 417850 A GB417850 A GB 417850A GB 7117/33 A GB7117/33 A GB 7117/33A GB 711733 A GB711733 A GB 711733A GB 417850 A GB417850 A GB 417850A
Authority
GB
United Kingdom
Prior art keywords
cathode
march
cylinder
electron
control grid
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
GB7117/33A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB417850A publication Critical patent/GB417850A/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
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
    • 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • 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
    • H01J29/485—Construction of the gun or of parts thereof
    • 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
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • 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
    • H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation

Abstract

417,850. Cathode ray tubes. RADIOAKT.-GES.,D. S. LOEWE, 10, Wiesenweg, Steglitz, and SCHLESINGER, K., 39, Friedrichstrasse, Friedrichshagen, both in Berlin. March 9, 1933, Nos. 7117/33, 18362/34, 18363/34, and 18364/34. Convention dates, March 10, 1932, March 18, 1932, March 24, 1932, and April 4, 1932. [Class 39 (i).] A Braun tube, which may be gas-filled, comprises an indirectly-heated cathode 16, Fig. 3, and a control grid 26, which consists of a perforated diaphragm and is arranged at a distance not greater than 2 mms. from the cathode, both electrodes being located within a Wehnelt cylinder 3. A screening and concentrating grid 21 may be arranged near the control grid and is provided with a cylindrical member which surrounds the control grid. In a modification, the control grid consists of a cylinder 1, Fig. 4, provided with a tubular abutment 7 or with a meshed grid fitted in the opening for the ray. An indirectly-heated cathode consists of an electron-emitting metal or oxide coating 6 on a coating 5 on an insulating tube 3 which is secured within the cylinder by means of an insulating plate 2. A heater 4 is energized from a battery 9. The cylinder may have a positive potential of 10 to 60 volts with respect to the cathode, which may be furnished with a plane convex or concave electron-emitting surface. The invention is applicable to the construction of Braun tube described in Specification 420,667. An electron optical system comprising an anode, having a tubular abutment, and a plate-shaped electrode, and a getter or a hydride to maintain the gas pressure may be provided as described in Specification 417,713. The Specification as open to inspection under Sect. 91 states also that the tube may be provided with insulating or metallic members for screening the cathode ray from the highvoltage leads as described in Specification 420,876. The cathode may be located within a container, closed with the exception of an opening for the ray, and is provided with an electron-emitting coating by the generation of metallic vapour from a substance located within the container as described in Specification 417,714. An auxiliary electrode in the form of an internal coating may be provided. This subject-matter does not appear in the Specification as accepted.
GB7117/33A 1932-03-18 1933-03-09 Braun tube Expired GB417850A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL80776D DE768131C (en) 1932-03-18 1932-03-18 Braun's tube, in which all electrodes are held using holders attached to the pinch foot
DEK154930D DE726884C (en) 1932-03-18 1932-03-24 Cathode ray tubes with several separately controllable beam bundles

Publications (1)

Publication Number Publication Date
GB417850A true GB417850A (en) 1934-10-09

Family

ID=7253160

Family Applications (4)

Application Number Title Priority Date Filing Date
GB18360/34A Expired GB417713A (en) 1932-03-18 1933-03-09 Improvements in and relating to cathode ray-tubes
GB7117/33A Expired GB417850A (en) 1932-03-18 1933-03-09 Braun tube
GB18359/34A Expired GB420876A (en) 1932-03-18 1933-03-09 Braun tube
GB18361/34A Expired GB417714A (en) 1932-03-18 1933-03-09 Braun tube

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB18360/34A Expired GB417713A (en) 1932-03-18 1933-03-09 Improvements in and relating to cathode ray-tubes

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB18359/34A Expired GB420876A (en) 1932-03-18 1933-03-09 Braun tube
GB18361/34A Expired GB417714A (en) 1932-03-18 1933-03-09 Braun tube

Country Status (5)

Country Link
US (2) US2049781A (en)
BE (1) BE394911A (en)
DE (2) DE768131C (en)
FR (1) FR753487A (en)
GB (4) GB417713A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763222C (en) * 1938-08-23 1954-10-04 Siemens & Halske A G Indirectly heated glow cathode for electron beam tubes
US2482151A (en) * 1944-08-18 1949-09-20 Philips Lab Inc Cathode-ray projection tube
US2570165A (en) * 1949-08-16 1951-10-02 Rca Corp Limited-area cathode
US2755413A (en) * 1951-02-23 1956-07-17 Edgar R Wagner Gas filled projector tubes for television
DE1100826B (en) * 1955-05-27 1961-03-02 Telefunken Gmbh Electrode arrangement for the common focusing of electron beams of a multiple cathode ray tube running in one plane
US2963608A (en) * 1957-08-07 1960-12-06 Sylvania Electric Prod Cathode ray tube structure
US3143681A (en) * 1959-12-07 1964-08-04 Gen Electric Spiral electrostatic electron lens
DE1156521B (en) * 1961-09-05 1963-10-31 Heraeus Gmbh W C Electron beam gun for heating metals
US3240973A (en) * 1962-03-01 1966-03-15 Rca Corp Electrostatic saddle field collimating system
DE1789136C3 (en) * 1967-01-14 1982-09-23 Sony Corp., Tokyo cathode ray tube

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565855A (en) * 1920-11-26 1925-12-15 Western Electric Co Vacuum tube
US1632080A (en) * 1921-12-27 1927-06-14 Western Electric Co Electric discharge device
DE488933C (en) * 1925-08-09 1930-01-09 Siemens Schuckertwerke Akt Ges Brown tube with glow cathode and noble gas filling
DE507879C (en) * 1927-01-01 1930-09-20 Hans Mueri Dr Dishwasher
FR699478A (en) * 1929-10-25 1931-02-16 Improvements to cathode ray tubes

Also Published As

Publication number Publication date
FR753487A (en) 1933-10-16
US2141414A (en) 1938-12-27
GB420876A (en) 1934-12-10
BE394911A (en) 1933-04-29
GB417713A (en) 1934-10-09
GB417714A (en) 1934-10-09
DE726884C (en) 1942-10-22
DE768131C (en) 1956-03-15
US2049781A (en) 1936-08-04

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