FR833384A - Loudspeaker diaphragm made of solidified foamy synthetic resins - Google Patents

Loudspeaker diaphragm made of solidified foamy synthetic resins

Info

Publication number
FR833384A
FR833384A FR833384DA FR833384A FR 833384 A FR833384 A FR 833384A FR 833384D A FR833384D A FR 833384DA FR 833384 A FR833384 A FR 833384A
Authority
FR
France
Prior art keywords
solidified
synthetic resins
loudspeaker diaphragm
diaphragm made
foamy
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Application granted granted Critical
Publication of FR833384A publication Critical patent/FR833384A/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)
FR833384D 1937-02-15 1938-02-08 Loudspeaker diaphragm made of solidified foamy synthetic resins Expired FR833384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE510707X 1937-02-15

Publications (1)

Publication Number Publication Date
FR833384A true FR833384A (en) 1938-10-20

Family

ID=6547523

Family Applications (1)

Application Number Title Priority Date Filing Date
FR833384D Expired FR833384A (en) 1937-02-15 1938-02-08 Loudspeaker diaphragm made of solidified foamy synthetic resins

Country Status (3)

Country Link
FR (1) FR833384A (en)
GB (1) GB510707A (en)
NL (1) NL50893C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE965995C (en) * 1950-11-25 1957-07-04 Dr Emil Podszus Speaker cone
DE972185C (en) * 1950-10-18 1959-06-04 Emil Dr Podszus Membrane with foam structure for loudspeakers
DE1098542B (en) * 1954-09-18 1961-02-02 Dr Emil Podszus Loudspeaker made up of several elements
DE976429C (en) * 1950-06-08 1963-09-19 Emil Dr Podszus Foam membrane for loudspeakers and process for their manufacture
DE977538C (en) * 1943-03-16 1966-12-15 Emil Dr Podszus Process for the production of loudspeaker diaphragms with a foam structure

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763333A (en) * 1951-10-03 1956-09-18 Petts Josephine Mason Sound transmission and reproduction
US2981360A (en) * 1954-02-18 1961-04-25 Bayer Ag Sound-absorbing systems
US2959242A (en) * 1954-12-21 1960-11-08 Bayer Ag Sound-absorbing system
US2905260A (en) * 1955-02-24 1959-09-22 Muter Company Loud speaker diaphragm
US2881850A (en) * 1955-07-25 1959-04-14 Bonn Leonard Infinite baffle comprising a spherical shell of foamed plastic
US2840177A (en) * 1955-07-28 1958-06-24 Alexander I Abrahams Loudspeaker diaphragm support
US3082838A (en) * 1959-11-03 1963-03-26 Walter S Gajdosik Toy communication device
US3111187A (en) * 1959-11-23 1963-11-19 H J Leak & Company Ltd Diaphragm for electro acoustic transducer
US3164221A (en) * 1961-06-06 1965-01-05 Rosen Alfred H Low frequency loudspeaker system
DE1256261B (en) * 1962-01-15 1967-12-14 Akustische Oscillating plate for creating an artificial reverberation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977538C (en) * 1943-03-16 1966-12-15 Emil Dr Podszus Process for the production of loudspeaker diaphragms with a foam structure
DE976429C (en) * 1950-06-08 1963-09-19 Emil Dr Podszus Foam membrane for loudspeakers and process for their manufacture
DE972185C (en) * 1950-10-18 1959-06-04 Emil Dr Podszus Membrane with foam structure for loudspeakers
DE965995C (en) * 1950-11-25 1957-07-04 Dr Emil Podszus Speaker cone
DE1098542B (en) * 1954-09-18 1961-02-02 Dr Emil Podszus Loudspeaker made up of several elements

Also Published As

Publication number Publication date
GB510707A (en) 1939-08-04
NL50893C (en) 1900-01-01

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