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GB309389A - Improvements in and relating to gramophone reproducing sound boxes - Google Patents

Improvements in and relating to gramophone reproducing sound boxes

Info

Publication number
GB309389A
GB309389A GB23228A GB23228A GB309389A GB 309389 A GB309389 A GB 309389A GB 23228 A GB23228 A GB 23228A GB 23228 A GB23228 A GB 23228A GB 309389 A GB309389 A GB 309389A
Authority
GB
United Kingdom
Prior art keywords
sound
gramophone
relating
box
reproducing sound
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
GB23228A
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
Priority to GB23228A priority Critical patent/GB309389A/en
Publication of GB309389A publication Critical patent/GB309389A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Control Devices (AREA)

Abstract

309,389. Wilson, J. Jan. 4, 1928. Sound-box casings; multiplediaphragm sound-boxes. - One or more cone-shaped free-edge diaphragms a are mounted in a closed sound box b, so that the sound from the closed side of the box will pass round the free edge of the cone or cones and unite with the sound on the other side on its way to the tone arm. When two diaphragms are used, they face in opposite directions and the tool arm c is situated between them.
GB23228A 1928-01-04 1928-01-04 Improvements in and relating to gramophone reproducing sound boxes Expired GB309389A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB23228A GB309389A (en) 1928-01-04 1928-01-04 Improvements in and relating to gramophone reproducing sound boxes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23228A GB309389A (en) 1928-01-04 1928-01-04 Improvements in and relating to gramophone reproducing sound boxes

Publications (1)

Publication Number Publication Date
GB309389A true GB309389A (en) 1929-04-04

Family

ID=9700733

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23228A Expired GB309389A (en) 1928-01-04 1928-01-04 Improvements in and relating to gramophone reproducing sound boxes

Country Status (1)

Country Link
GB (1) GB309389A (en)

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