BE439377A - - Google Patents

Info

Publication number
BE439377A
BE439377A BE439377DA BE439377A BE 439377 A BE439377 A BE 439377A BE 439377D A BE439377D A BE 439377DA BE 439377 A BE439377 A BE 439377A
Authority
BE
Belgium
Prior art keywords
diaphragm
magnetic
magnet
emi
pole pieces
Prior art date
Application number
Other languages
English (en)
French (fr)
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.)
Publication of BE439377A publication Critical patent/BE439377A/fr

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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
BE439377D 1939-05-19 BE439377A (pm)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US274485A US2249158A (en) 1939-05-19 1939-05-19 Electroacoustic transducer

Publications (1)

Publication Number Publication Date
BE439377A true BE439377A (pm)

Family

ID=23048388

Family Applications (1)

Application Number Title Priority Date Filing Date
BE439377D BE439377A (pm) 1939-05-19

Country Status (5)

Country Link
US (1) US2249158A (pm)
BE (1) BE439377A (pm)
CH (1) CH233992A (pm)
FR (1) FR865593A (pm)
NL (1) NL73059C (pm)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449557A (en) * 1944-02-04 1948-09-21 Sonotone Corp Electromagnetic earphone receiver
US2492255A (en) * 1944-12-26 1949-12-27 John O Angehrn Sealed-coil type vibratory magnet loudspeaker
US2493734A (en) * 1945-05-23 1950-01-03 Sonotone Corp Magnetic insert earphone insertable in the ear of the user
BE476263A (pm) * 1946-06-21
US2515414A (en) * 1947-09-08 1950-07-18 Indiana Steel Products Co Telephone receiver
US2522266A (en) * 1948-05-25 1950-09-12 Beltone Hearing Aid Co Magnetic receiver
US2830240A (en) * 1954-09-23 1958-04-08 Hoffman Electronics Corp Electromagnetically controlled capacitors or the like
BE548920A (pm) * 1955-08-19
JPS57153400U (pm) * 1981-03-20 1982-09-27
US4852444A (en) * 1986-12-04 1989-08-01 Hoover Alan A Electro-mechanical transducer which couples positive acoustic feedback into an electric amplified guitar body for the purpose of sustaining played notes

Also Published As

Publication number Publication date
US2249158A (en) 1941-07-15
NL73059C (pm)
CH233992A (fr) 1944-08-31
FR865593A (fr) 1941-05-27

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