[go: up one dir, main page]

GB493297A - Improvements in or relating to tuning indicators for wireless receivers - Google Patents

Improvements in or relating to tuning indicators for wireless receivers

Info

Publication number
GB493297A
GB493297A GB9624/37A GB962437A GB493297A GB 493297 A GB493297 A GB 493297A GB 9624/37 A GB9624/37 A GB 9624/37A GB 962437 A GB962437 A GB 962437A GB 493297 A GB493297 A GB 493297A
Authority
GB
United Kingdom
Prior art keywords
light
source
station
slits
april
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
GB9624/37A
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.)
Electrical and Musical Industries Ltd
Original Assignee
Electrical and Musical Industries 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 Electrical and Musical Industries Ltd filed Critical Electrical and Musical Industries Ltd
Publication of GB493297A publication Critical patent/GB493297A/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
    • H03J1/042—Means insuring a precise reading of the dial, e.g. special scale, local illumination possibly temporary, luminous point moving with the pointer

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Selective Calling Equipment (AREA)

Abstract

493,297. Adjusting wireless apparatus. ELECTRIC & MUSICAL INDUSTRIES, Ltd. April 5, 1937, No. 9624. Convention date, April 4, 1936. [Class 37] Each station name is illuminated separately and successively by an optical projection system, the source of light being movable with the tuning mechanism and focusing in slits symmetric with the station positions and arranged in a mask located between the source of light and reading scale. The station names are spaced vertically and laterally in areas a<1> on a scale plate a, the mask b being provided with slits g for focusing the light rays and illuminating each name area separately. Fig. 4 shows different forms of optical units comprising a light source d, reflector h and lens e, the particular unit employed being mechanically connected for movement with the tuning drive.
GB9624/37A 1936-04-04 1937-04-05 Improvements in or relating to tuning indicators for wireless receivers Expired GB493297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE493297X 1936-04-04

Publications (1)

Publication Number Publication Date
GB493297A true GB493297A (en) 1938-10-05

Family

ID=6544539

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9624/37A Expired GB493297A (en) 1936-04-04 1937-04-05 Improvements in or relating to tuning indicators for wireless receivers

Country Status (1)

Country Link
GB (1) GB493297A (en)

Similar Documents

Publication Publication Date Title
GB1138774A (en) Optical programming apparatus
GB493297A (en) Improvements in or relating to tuning indicators for wireless receivers
US2027663A (en) Ophthalmoscope
US3225648A (en) Apparatus for projecting transparencies and opacities
US1955085A (en) Tuning indicator
US2112111A (en) Indicia projection for radios
GB190911112A (en) Improvements in and relating to Illuminated Signs and Indicators.
GB453810A (en) Apparatus for the production of screened images for preparing photomechanical printing surfaces
GB401511A (en) Improvements in methods and apparatus for the photographic reproduction of letterpress printing formes
GB282053A (en) Apparatus for illuminated advertisement
GB475121A (en) Improvements in or relating to tuning scales for radio or the like receivers
US1913977A (en) Radio indicator
GB537151A (en) Improvements in or relating to the mounting of magnifying glasses
GB473503A (en) Improvements in projection indicators in broadcast apparatus
GB526404A (en) Improvements in and relating to optical projection apparatus
GB492871A (en) Improvements in devices for imaging an object illuminated in incident light
GB490464A (en) Improvements in or relating exposure meters for photographic enlargements
GB430679A (en) Improvements in or relating to tuning arrangements for radio receivers
GB477096A (en) Improvements in tuning scales for radio receivers
GB252217A (en) Improvements in luminous indicators, particularly for use in connection with railwaytraffic
GB367867A (en) Device for the projection of transparencies
ES58896U (en) Apparatus for the observation and assembly of film film (Machine-translation by Google Translate, not legally binding)
GB485766A (en) Improvements in or relating to optical projection apparatus suitable for facilitating the reproduction of plans and the like
GB552875A (en) Measuring microscope
GB533955A (en) Improvements in or relating to optical testing or measuring apparatus