GB520623A - Improvements in electric discharge tubes for the optical indication of voltages - Google Patents

Improvements in electric discharge tubes for the optical indication of voltages

Info

Publication number
GB520623A
GB520623A GB18267/39A GB1826739A GB520623A GB 520623 A GB520623 A GB 520623A GB 18267/39 A GB18267/39 A GB 18267/39A GB 1826739 A GB1826739 A GB 1826739A GB 520623 A GB520623 A GB 520623A
Authority
GB
United Kingdom
Prior art keywords
bulb
anode
voltages
electric discharge
discharge tubes
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
GB18267/39A
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.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve Co Ltd
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 Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Publication of GB520623A publication Critical patent/GB520623A/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

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

520,623. Discharge apparatus. MULLARD RADIO VALVE CO., Ltd. June 22, 1939, No. 18267. Convention date, June 25, 1938. Drawings to Specification. [Class 39 (i)] In a discharge tube comprising an anode which is adapted to give a luminous indication of an applied voltage, the top of the bulb through which the anode is viewed is of reentrant form. The bulb may be pressed or blown to shape, and the re-entrant top may be curved or flat; in another form the bulb is of metal. The luminous anode may be of the usual dish-shaped form provided with a central cathode and a control electrode which is connected to the anode of an amplifying triode located within the bulb.
GB18267/39A 1938-06-25 1939-06-22 Improvements in electric discharge tubes for the optical indication of voltages Expired GB520623A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB520623A true GB520623A (en) 1940-04-29

Family

ID=19778824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18267/39A Expired GB520623A (en) 1938-06-25 1939-06-22 Improvements in electric discharge tubes for the 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
US3188512A (en) * 1960-12-22 1965-06-08 Welch Allyn Inc Miniature lamp and method for making it

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
JPS6047696B2 (en) * 1977-10-19 1985-10-23 松下電器産業株式会社 picture tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188512A (en) * 1960-12-22 1965-06-08 Welch Allyn Inc Miniature lamp and method for making it

Also Published As

Publication number Publication date
CH210912A (en) 1940-08-15
BE435059A (en)
DE737997C (en) 1943-07-30
NL50271C (en)
FR856864A (en) 1940-08-13

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