FR849541A - Improvements to the beam concentration control of electronic secondary emission lamps - Google Patents

Improvements to the beam concentration control of electronic secondary emission lamps

Info

Publication number
FR849541A
FR849541A FR849541DA FR849541A FR 849541 A FR849541 A FR 849541A FR 849541D A FR849541D A FR 849541DA FR 849541 A FR849541 A FR 849541A
Authority
FR
France
Prior art keywords
concentration control
secondary emission
beam concentration
emission lamps
electronic secondary
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
Other languages
French (fr)
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Application granted granted Critical
Publication of FR849541A publication Critical patent/FR849541A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
    • H01J31/04—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with only one or two output electrodes with only two electrically independant groups or electrodes
FR849541D 1938-01-28 1939-01-27 Improvements to the beam concentration control of electronic secondary emission lamps Expired FR849541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE524417X 1938-01-28

Publications (1)

Publication Number Publication Date
FR849541A true FR849541A (en) 1939-11-25

Family

ID=6552276

Family Applications (1)

Application Number Title Priority Date Filing Date
FR849541D Expired FR849541A (en) 1938-01-28 1939-01-27 Improvements to the beam concentration control of electronic secondary emission lamps

Country Status (3)

Country Link
US (1) US2266639A (en)
FR (1) FR849541A (en)
GB (1) GB524417A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477667A (en) * 1943-08-19 1949-08-02 Nora A Woodin Electron tube
BE479372A (en) * 1947-01-08
US2635206A (en) * 1949-01-06 1953-04-14 Bell Telephone Labor Inc Generation of microwaves
US3229213A (en) * 1962-07-20 1966-01-11 James W Schwartz Bistable electron device comprising axially spaced dynodes
US5401951A (en) * 1993-05-28 1995-03-28 Loral Infrared & Imaging Systems, Inc. Method and apparatus for overload protection for a photomultiplier tube

Also Published As

Publication number Publication date
GB524417A (en) 1940-08-06
US2266639A (en) 1941-12-16

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