FR2477824B1 - - Google Patents

Info

Publication number
FR2477824B1
FR2477824B1 FR8005143A FR8005143A FR2477824B1 FR 2477824 B1 FR2477824 B1 FR 2477824B1 FR 8005143 A FR8005143 A FR 8005143A FR 8005143 A FR8005143 A FR 8005143A FR 2477824 B1 FR2477824 B1 FR 2477824B1
Authority
FR
France
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
FR8005143A
Other languages
French (fr)
Other versions
FR2477824A1 (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.)
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 FR8005143A priority Critical patent/FR2477824A1/fr
Priority to US06/234,020 priority patent/US4348342A/en
Priority to JP3143481A priority patent/JPS56143796A/ja
Publication of FR2477824A1 publication Critical patent/FR2477824A1/fr
Application granted granted Critical
Publication of FR2477824B1 publication Critical patent/FR2477824B1/fr
Granted 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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Molding Of Porous Articles (AREA)
FR8005143A 1980-03-07 1980-03-07 Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse Granted FR2477824A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8005143A FR2477824A1 (fr) 1980-03-07 1980-03-07 Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse
US06/234,020 US4348342A (en) 1980-03-07 1981-02-12 Method for making electrodynamic loudspeakers having a planar diaphragm of expanded polystyrene
JP3143481A JPS56143796A (en) 1980-03-07 1981-03-06 Method of manufacturing diaphragm for dynamic speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8005143A FR2477824A1 (fr) 1980-03-07 1980-03-07 Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse

Publications (2)

Publication Number Publication Date
FR2477824A1 FR2477824A1 (fr) 1981-09-11
FR2477824B1 true FR2477824B1 (OSRAM) 1984-02-17

Family

ID=9239425

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8005143A Granted FR2477824A1 (fr) 1980-03-07 1980-03-07 Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse

Country Status (3)

Country Link
US (1) US4348342A (OSRAM)
JP (1) JPS56143796A (OSRAM)
FR (1) FR2477824A1 (OSRAM)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604663A (en) * 1950-01-06 1952-07-29 Talalay Joseph Anton Method of making a cellular rubber article
GB884322A (en) 1959-06-15 1961-12-13 Scholl Mfg Co Ltd Improvements in and relating to fashioning plastic foam
FR1269138A (fr) 1960-06-23 1961-08-11 Perfectionnements apportés aux haut-parleurs, aux microphones, et aux dispositifs analogues, de type électrodynamique
US3351719A (en) * 1964-02-05 1967-11-07 Electronic Res Associates Inc Loudspeaker assembly
US3863908A (en) * 1965-04-15 1975-02-04 Saint Gobain Cellular, resinous products and methods and apparatus for making them
FR1555781A (OSRAM) * 1967-12-06 1969-01-31
FR2036087A5 (OSRAM) * 1969-03-04 1970-12-24 Gogny Georges
US3889032A (en) * 1972-05-10 1975-06-10 Lester Max Koelsch Foamed plastic sheet material and system for its manufacture

Also Published As

Publication number Publication date
US4348342A (en) 1982-09-07
JPS56143796A (en) 1981-11-09
FR2477824A1 (fr) 1981-09-11

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Legal Events

Date Code Title Description
ST Notification of lapse