CH204649A - Electro-acoustic apparatus with a lightweight membrane. - Google Patents

Electro-acoustic apparatus with a lightweight membrane.

Info

Publication number
CH204649A
CH204649A CH204649DA CH204649A CH 204649 A CH204649 A CH 204649A CH 204649D A CH204649D A CH 204649DA CH 204649 A CH204649 A CH 204649A
Authority
CH
Switzerland
Prior art keywords
electro
acoustic apparatus
lightweight membrane
lightweight
membrane
Prior art date
Application number
Other languages
German (de)
Inventor
Haftung Neue Tel Beschraenkter
Original Assignee
Neue Telefon Gmbh
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 Neue Telefon Gmbh filed Critical Neue Telefon Gmbh
Publication of CH204649A publication Critical patent/CH204649A/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
CH204649D 1937-03-10 1938-02-17 Electro-acoustic apparatus with a lightweight membrane. CH204649A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE426663X 1937-03-10

Publications (1)

Publication Number Publication Date
CH204649A true CH204649A (en) 1939-05-15

Family

ID=5782987

Family Applications (1)

Application Number Title Priority Date Filing Date
CH204649D CH204649A (en) 1937-03-10 1938-02-17 Electro-acoustic apparatus with a lightweight membrane.

Country Status (4)

Country Link
AT (1) AT157075B (en)
BE (1) BE426663A (en)
CH (1) CH204649A (en)
FR (1) FR834435A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1129538B (en) * 1959-11-14 1962-05-17 Akg Akustische Kino Geraete Moving coil microphone

Also Published As

Publication number Publication date
BE426663A (en) 1938-03-31
FR834435A (en) 1938-11-21
AT157075B (en) 1939-09-25

Similar Documents

Publication Publication Date Title
CH318177A (en) Electrodialysis machine with assisted membranes
CH204649A (en) Electro-acoustic apparatus with a lightweight membrane.
CH206031A (en) Facility with opposing metallic bodies placed under tension.
CH206312A (en) Amplifier circuit with negative feedback.
DK51686C (en) Acoustic Apparatus.
CH210925A (en) Pressure telegraph apparatus.
DK54789C (en) Acoustic Apparatus.
GR6672B (en) LIGHTWEIGHT MAKING DEVICE.
CH208092A (en) Negative feedback amplifier.
AT194375B (en) Electrodialysis machine with assisted membranes
DK59295C (en) Remote Camera or similar Apparatus.
DK54244C (en) Acoustic Apparatus.
DK51855C (en) Acoustic Apparatus.
CH196101A (en) Desk signal apparatus.
DK48815C (en) Photographic Apparatus.
DK51614C (en) Sound reproducing apparatus.
DK52903C (en) Electrodynamic Apparatus.
DK56184C (en) Acoustic Signal Apparatus.
CH203819A (en) Amplifier device with negative feedback.
DK59227C (en) Magnetostrictive Device, especially magnetostrictive Microphone.
DK58436C (en) Apparatus for the production of sound records.
ES1255Y (en) Duplicator apparatus.
AT158033B (en) Cinematographic combination process.
ES145615A1 (en) A compensated catapult.
AT156065B (en) Speaker.