GB316203A - Improvements in or relating to sound recording and reproducing instruments - Google Patents

Improvements in or relating to sound recording and reproducing instruments

Info

Publication number
GB316203A
GB316203A GB36049/28A GB3604928A GB316203A GB 316203 A GB316203 A GB 316203A GB 36049/28 A GB36049/28 A GB 36049/28A GB 3604928 A GB3604928 A GB 3604928A GB 316203 A GB316203 A GB 316203A
Authority
GB
United Kingdom
Prior art keywords
relating
sound recording
absorbent medium
reproducing instruments
diaphragm
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
GB36049/28A
Other languages
English (en)
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 GB316203A publication Critical patent/GB316203A/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)
  • Diaphragms For Electromechanical Transducers (AREA)
GB36049/28A 1928-07-25 1928-12-06 Improvements in or relating to sound recording and reproducing instruments Expired GB316203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL316203X 1928-07-25

Publications (1)

Publication Number Publication Date
GB316203A true GB316203A (en) 1929-08-22

Family

ID=19783812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36049/28A Expired GB316203A (en) 1928-07-25 1928-12-06 Improvements in or relating to sound recording and reproducing instruments

Country Status (3)

Country Link
BE (1) BE360817A (enrdf_load_stackoverflow)
FR (1) FR675435A (enrdf_load_stackoverflow)
GB (1) GB316203A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE360817A (enrdf_load_stackoverflow)
FR675435A (fr) 1930-02-10

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