GB357770A - Improved scale-lighting device for radio receiving apparatus - Google Patents

Improved scale-lighting device for radio receiving apparatus

Info

Publication number
GB357770A
GB357770A GB28294/30A GB2829430A GB357770A GB 357770 A GB357770 A GB 357770A GB 28294/30 A GB28294/30 A GB 28294/30A GB 2829430 A GB2829430 A GB 2829430A GB 357770 A GB357770 A GB 357770A
Authority
GB
United Kingdom
Prior art keywords
radio receiving
receiving apparatus
lighting device
improved scale
scale
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
GB28294/30A
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
Publication of GB357770A publication Critical patent/GB357770A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/02—Indicating arrangements
    • H03J1/04—Indicating arrangements with optical indicating means
    • H03J1/044—Illumination of the tuning dial; On and off switching of the illumination; Circuits related with illumination

Landscapes

  • Circuits Of Receivers In General (AREA)

Abstract

357,770. Adjusting wireless apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Sept. 22, 1930, No. 28294. Convention date, Oct. 3, 1929. [Class 37.] The lamp for lighting the scales of radio receiving apparatus comprises an electric discharge tube which also supplies determined voltages for working the apparatus. A diode rectifier 1 supplying voltage tappings 5, 6, 7 may be employed for illuminating the scale 4. Alternatively a neon &c. tube with resistance taps for grid bias supply may be provided.
GB28294/30A 1929-10-03 1930-09-22 Improved scale-lighting device for radio receiving apparatus Expired GB357770A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL357770X 1929-10-03

Publications (1)

Publication Number Publication Date
GB357770A true GB357770A (en) 1931-10-01

Family

ID=19785289

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28294/30A Expired GB357770A (en) 1929-10-03 1930-09-22 Improved scale-lighting device for radio receiving apparatus

Country Status (3)

Country Link
BE (1) BE373768A (en)
FR (1) FR702770A (en)
GB (1) GB357770A (en)

Also Published As

Publication number Publication date
FR702770A (en) 1931-04-16
BE373768A (en)

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