FR856864A - Electric discharge tube for optical indication of voltages - Google Patents

Electric discharge tube for optical indication of voltages

Info

Publication number
FR856864A
FR856864A FR856864DA FR856864A FR 856864 A FR856864 A FR 856864A FR 856864D A FR856864D A FR 856864DA FR 856864 A FR856864 A FR 856864A
Authority
FR
France
Prior art keywords
voltages
discharge tube
electric discharge
optical indication
indication
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR856864A publication Critical patent/FR856864A/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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/861—Vessels or containers characterised by the form or the structure thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/14—Magic-eye or analogous tuning indicators
FR856864D 1938-06-25 1939-06-24 Electric discharge tube for optical indication of voltages Expired FR856864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL210912X 1938-06-25

Publications (1)

Publication Number Publication Date
FR856864A true FR856864A (en) 1940-08-13

Family

ID=19778824

Family Applications (1)

Application Number Title Priority Date Filing Date
FR856864D Expired FR856864A (en) 1938-06-25 1939-06-24 Electric discharge tube for optical indication of voltages

Country Status (6)

Country Link
BE (1) BE435059A (en)
CH (1) CH210912A (en)
DE (1) DE737997C (en)
FR (1) FR856864A (en)
GB (1) GB520623A (en)
NL (1) NL50271C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406887A1 (en) * 1977-10-19 1979-05-18 Matsushita Electric Ind Co Ltd CRT giving reduced distraction due to reflections - has screen with concave outer surface with radius of curvature selected according to viewing distance

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625612A (en) * 1951-06-22 1953-01-13 Joseph M Rheins Telephone holder or support
DE949187C (en) * 1952-12-12 1956-09-13 Siemens Ag Electron tubes with luminescent screen, in particular tuning indicator tubes
US3188512A (en) * 1960-12-22 1965-06-08 Welch Allyn Inc Miniature lamp and method for making it

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406887A1 (en) * 1977-10-19 1979-05-18 Matsushita Electric Ind Co Ltd CRT giving reduced distraction due to reflections - has screen with concave outer surface with radius of curvature selected according to viewing distance

Also Published As

Publication number Publication date
BE435059A (en)
GB520623A (en) 1940-04-29
DE737997C (en) 1943-07-30
NL50271C (en)
CH210912A (en) 1940-08-15

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