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FR680596A - Process for manufacturing membranes that can be used for all physical or other devices - Google Patents

Process for manufacturing membranes that can be used for all physical or other devices

Info

Publication number
FR680596A
FR680596A FR680596DA FR680596A FR 680596 A FR680596 A FR 680596A FR 680596D A FR680596D A FR 680596DA FR 680596 A FR680596 A FR 680596A
Authority
FR
France
Prior art keywords
physical
devices
manufacturing membranes
membranes
manufacturing
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)
Inventor
Constantin Chilowsky
Paul Breton
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 filed Critical
Application granted granted Critical
Publication of FR680596A publication Critical patent/FR680596A/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
    • 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
    • H04R19/00—Electrostatic transducers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
FR680596D 1928-12-28 1928-12-28 Process for manufacturing membranes that can be used for all physical or other devices Expired FR680596A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR529978X 1928-12-28

Publications (1)

Publication Number Publication Date
FR680596A true FR680596A (en) 1930-05-02

Family

ID=8923011

Family Applications (2)

Application Number Title Priority Date Filing Date
FR680596D Expired FR680596A (en) 1928-12-28 1928-12-28 Process for manufacturing membranes that can be used for all physical or other devices
FR38244D Expired FR38244E (en) 1928-12-28 1929-10-14 Process for manufacturing membranes that can be used for all physical or other devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR38244D Expired FR38244E (en) 1928-12-28 1929-10-14 Process for manufacturing membranes that can be used for all physical or other devices

Country Status (3)

Country Link
US (1) US1945933A (en)
DE (1) DE529978C (en)
FR (2) FR680596A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744286C (en) * 1937-03-02 1944-01-13 Siemens Ag Membrane produced from pulp by dipping or pouring for electroacoustic devices
US2510262A (en) * 1944-09-08 1950-06-06 Univ Minnesota Process of making ionic membranes
US2570273A (en) * 1948-09-20 1951-10-09 Paul L Pryor Method of making optical pellicles
US3445321A (en) * 1967-05-01 1969-05-20 Gen Electric Thin,reinforced permselective films
US4279855A (en) * 1973-05-02 1981-07-21 General Electric Company Method for the casting of ultrathin polymer membranes
US4297820A (en) * 1977-12-05 1981-11-03 Covington Brothers Technologies Composite structural panel with multilayered reflective core
US4226067A (en) * 1977-12-05 1980-10-07 Covington Brothers Building Systems, Inc. Structural panel
US4336676A (en) * 1977-12-05 1982-06-29 Covington Brothers, Inc. Composite structural panel with offset core
US4160882A (en) * 1978-03-13 1979-07-10 Driver Michael L Double diaphragm electrostatic transducer each diaphragm comprising two plastic sheets having different charge carrying characteristics

Also Published As

Publication number Publication date
DE529978C (en) 1931-07-20
FR38244E (en) 1931-04-24
US1945933A (en) 1934-02-06

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