GB438631A - Improvements in and relating to radio receivers - Google Patents

Improvements in and relating to radio receivers

Info

Publication number
GB438631A
GB438631A GB34473/34A GB3447334A GB438631A GB 438631 A GB438631 A GB 438631A GB 34473/34 A GB34473/34 A GB 34473/34A GB 3447334 A GB3447334 A GB 3447334A GB 438631 A GB438631 A GB 438631A
Authority
GB
United Kingdom
Prior art keywords
dial
sheet
waveband
pointer
tuning
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
GB34473/34A
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 GB438631A publication Critical patent/GB438631A/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
    • 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
    • H03J1/041—Pointers, markers, or the like, for tuning dials; Folding dials

Landscapes

  • Audible And Visible Signals (AREA)
  • Structure Of Receivers (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

438,631. Wireless receiving-apparatus. DREYFUS, J., 12, Square Alboni, Paris. Nov. 30, 1934, Nos. 34473 and 34474. Convention dates, April 16 and June 8. [Class 40 (v)] [See also Group XXXVI] The tuning dial of a radio receiver is arranged in front of the mouth of the loudspeaker 3, a dial lamp 5 being mounted centrally as shown The aperture in the cabinet 1 is closed by a sheet 4 of organdie or other fabric suitable for receiving printing, while a further sheet 6 of silk crÛpe renders the dial marking invisible except when the light 5 is switched on. The indicator 15 is close to and preferably behind the dial sheet 4 so that its shadow is cast on the dial; the drive is from a pulley 21 on the tuning condenser spindle and the motion is adjusted by shaping the pulleys so that the dial markings are at nearly regular intervals. The pointer may have apertures 15a corresponding to circumferential divisions a<1>, a<2>, a<3>, one for each waveband. Or the pointer may carry a neon tube the illuminated length of which varies according to the waveband in use. The inner surface of the loudspeaker diaphragm 13 may be silvered to act as a reflector.
GB34473/34A 1934-04-16 1934-11-30 Improvements in and relating to radio receivers Expired GB438631A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR438631X 1934-04-16
FR471733X 1935-03-16

Publications (1)

Publication Number Publication Date
GB438631A true GB438631A (en) 1935-11-20

Family

ID=60326998

Family Applications (2)

Application Number Title Priority Date Filing Date
GB34473/34A Expired GB438631A (en) 1934-04-16 1934-11-30 Improvements in and relating to radio receivers
GB33922/35A Expired GB471733A (en) 1934-04-16 1935-12-06 Tuning dial for radio receiving apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB33922/35A Expired GB471733A (en) 1934-04-16 1935-12-06 Tuning dial for radio receiving apparatus

Country Status (1)

Country Link
GB (2) GB438631A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523103A (en) * 1946-08-08 1950-09-19 Zenith Radio Corp Combined dial-speaker arrangement for radio receivers

Also Published As

Publication number Publication date
GB471733A (en) 1937-09-06

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