GB187694A - Improvements in or relating to diaphragms for sound-boxes of talking-machines and the like - Google Patents

Improvements in or relating to diaphragms for sound-boxes of talking-machines and the like

Info

Publication number
GB187694A
GB187694A GB1967021A GB1967021A GB187694A GB 187694 A GB187694 A GB 187694A GB 1967021 A GB1967021 A GB 1967021A GB 1967021 A GB1967021 A GB 1967021A GB 187694 A GB187694 A GB 187694A
Authority
GB
United Kingdom
Prior art keywords
diaphragms
talking
boxes
relating
machines
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
GB1967021A
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.)
JOHN HARLING BAILEY
MAURICE ARTHUR HARDYMAN
Original Assignee
JOHN HARLING BAILEY
MAURICE ARTHUR HARDYMAN
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 JOHN HARLING BAILEY, MAURICE ARTHUR HARDYMAN filed Critical JOHN HARLING BAILEY
Priority to GB1967021A priority Critical patent/GB187694A/en
Publication of GB187694A publication Critical patent/GB187694A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

187,694. Bailey, J. H., and Hardyman, M. A. July 21, 1921. Diaphragms, shape of.-An ebonite diaphragm with one or more concentric circular corrugations A is formed with a plain central portion, as shown.
GB1967021A 1921-07-21 1921-07-21 Improvements in or relating to diaphragms for sound-boxes of talking-machines and the like Expired GB187694A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1967021A GB187694A (en) 1921-07-21 1921-07-21 Improvements in or relating to diaphragms for sound-boxes of talking-machines and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1967021A GB187694A (en) 1921-07-21 1921-07-21 Improvements in or relating to diaphragms for sound-boxes of talking-machines and the like

Publications (1)

Publication Number Publication Date
GB187694A true GB187694A (en) 1922-10-23

Family

ID=10133223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1967021A Expired GB187694A (en) 1921-07-21 1921-07-21 Improvements in or relating to diaphragms for sound-boxes of talking-machines and the like

Country Status (1)

Country Link
GB (1) GB187694A (en)

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