GB378681A - Improvements in or relating to cathode ray tubes, especially for television purposes - Google Patents

Improvements in or relating to cathode ray tubes, especially for television purposes

Info

Publication number
GB378681A
GB378681A GB26505/31A GB2650531A GB378681A GB 378681 A GB378681 A GB 378681A GB 26505/31 A GB26505/31 A GB 26505/31A GB 2650531 A GB2650531 A GB 2650531A GB 378681 A GB378681 A GB 378681A
Authority
GB
United Kingdom
Prior art keywords
cathode
tube
casing
mercury
heating
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
GB26505/31A
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
Application filed by Individual filed Critical Individual
Publication of GB378681A publication Critical patent/GB378681A/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
    • H01J29/94—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

378,681. Cathode-ray tubes DOERING, U. W., 45, G³ntzelstrasse, Wilmersdorf, Berlin. Sept. 22, 1931, No. 26505. Convention date, Sept. 24, 1930. [Class 39 (i).] A cathode-ray tube, especially for television purposes, has a mercury-vapour filling, which is developed from a mercury supply by heating the tube. In the arrangement shown in Fig. 1, the tube 1 is surrounded by a coil 2 which can be heated to any desired temperature by supplying current through a variable resistance 6. The tube is preferably provided with a metallic screening cover 3, preferably of iron or other magnetic material, to protect it from electromagnetic or electrostatic effects from the heating current. The screen 3 may be in the form of a wire netting ; if a uniform screen is used it is preferably subdivided by slots. In a modified arrangement, Fig. 2, a separate heating coil 7 is placed in one casing 4 containing the cathode-ray tube, and the casing is filled with iron shavings or iron powder to serve as a screen. In another arrangement, the heating effect necessary for the vaporization of the mercury is obtained by mounting the amplifying or rectifying tubes in the same casing as the cathode-ray tube, the casing being provided with valves for the adjustment of temperature. Reference has been directed by the Comptroller to Specification 206,081, [Class 39 (i), Electric lamps, Arc &c.].
GB26505/31A 1930-09-24 1931-09-22 Improvements in or relating to cathode ray tubes, especially for television purposes Expired GB378681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE378681X 1930-09-24

Publications (1)

Publication Number Publication Date
GB378681A true GB378681A (en) 1932-08-18

Family

ID=6344573

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26505/31A Expired GB378681A (en) 1930-09-24 1931-09-22 Improvements in or relating to cathode ray tubes, especially for television purposes

Country Status (1)

Country Link
GB (1) GB378681A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749069C (en) * 1939-01-20 1944-11-16 Braun tubes, especially for television receivers, with an implosion protection that rests on the tube wall at least almost seamlessly
US2497078A (en) * 1945-03-15 1950-02-14 James E Gall Tube mount
US2545524A (en) * 1945-08-29 1951-03-20 Rca Corp Schmidt television projection system
DE765083C (en) * 1937-11-04 1953-06-22 Manfred Baron Von Ardenne Electron microscope or scanning electron microscope
US2790105A (en) * 1951-11-01 1957-04-23 Bell Telephone Labor Inc Traveling wave tubes
US4556821A (en) * 1984-03-15 1985-12-03 Rca Corporation Color image display system having an improved external magnetic shield

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE765083C (en) * 1937-11-04 1953-06-22 Manfred Baron Von Ardenne Electron microscope or scanning electron microscope
DE749069C (en) * 1939-01-20 1944-11-16 Braun tubes, especially for television receivers, with an implosion protection that rests on the tube wall at least almost seamlessly
US2497078A (en) * 1945-03-15 1950-02-14 James E Gall Tube mount
US2545524A (en) * 1945-08-29 1951-03-20 Rca Corp Schmidt television projection system
US2790105A (en) * 1951-11-01 1957-04-23 Bell Telephone Labor Inc Traveling wave tubes
US4556821A (en) * 1984-03-15 1985-12-03 Rca Corporation Color image display system having an improved external magnetic shield

Similar Documents

Publication Publication Date Title
US1980534A (en) Gas arc lamp
GB378681A (en) Improvements in or relating to cathode ray tubes, especially for television purposes
GB521850A (en) Improvements in and relating to thermionic electrodes for electric discharge devices
USRE18798E (en) Discharge tube
US2062663A (en) Shielded electron discharge device
US1816619A (en) Gaseous conduction device
US2677061A (en) Ion source
GB607079A (en) Improved arrangement for supplying a sawtooth current to the deflecting coils of a cathode-ray tube
US1989132A (en) High voltage rectifier
US1689338A (en) Electron-discharge device
GB562178A (en) Improvements in and relating to electric discharge devices
US1408989A (en) X-ray apparatus
US1872567A (en) Discharge tube
US1881910A (en) Thermionic tube
US1720005A (en) Method of mounting misch metal in radiotrons
US1917997A (en) Electric discharge device
US1588231A (en) Electron-discharge apparatus
US1739498A (en) Stabilized vacuum-tube lighting system
GB480208A (en) Improvements in or relating to electric discharge devices
US2309874A (en) Electric discharge systems
GB688570A (en) Improved means for heating granular material for the purpose of drying it or otherwise
US2103093A (en) Gaseous electric discharge lamp device
GB543920A (en) Improvements in cathodes for cathode ray tubes
US1635794A (en) Transformer
US2443324A (en) Electronic tube