FR659355A - Acoustic instrument refinements - Google Patents

Acoustic instrument refinements

Info

Publication number
FR659355A
FR659355A FR659355DA FR659355A FR 659355 A FR659355 A FR 659355A FR 659355D A FR659355D A FR 659355DA FR 659355 A FR659355 A FR 659355A
Authority
FR
France
Prior art keywords
refinements
acoustic instrument
acoustic
instrument
instrument refinements
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
Other languages
French (fr)
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR659355A publication Critical patent/FR659355A/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)
  • Adhesives Or Adhesive Processes (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
FR659355D 1927-08-30 1928-08-23 Acoustic instrument refinements Expired FR659355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22779/27A GB303189A (en) 1927-08-30 1927-08-30 Improvements in or relating to acoustic instruments

Publications (1)

Publication Number Publication Date
FR659355A true FR659355A (en) 1929-06-27

Family

ID=10184938

Family Applications (1)

Application Number Title Priority Date Filing Date
FR659355D Expired FR659355A (en) 1927-08-30 1928-08-23 Acoustic instrument refinements

Country Status (3)

Country Link
US (1) US1844014A (en)
FR (1) FR659355A (en)
GB (1) GB303189A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905259A (en) * 1957-05-31 1959-09-22 Joseph D Carrabino Tubular speaker housing

Also Published As

Publication number Publication date
US1844014A (en) 1932-02-09
GB303189A (en) 1928-12-31

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