GB669883A - Electro-acoustic transducers - Google Patents

Electro-acoustic transducers

Info

Publication number
GB669883A
GB669883A GB9153/50A GB915350A GB669883A GB 669883 A GB669883 A GB 669883A GB 9153/50 A GB9153/50 A GB 9153/50A GB 915350 A GB915350 A GB 915350A GB 669883 A GB669883 A GB 669883A
Authority
GB
United Kingdom
Prior art keywords
coil
magnetic circuit
electro
april
diaphragm
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
GB9153/50A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB669883A publication Critical patent/GB669883A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/10—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

669,883. Receivers. TELEFONAKTIEBOLAGET L. M. ERICSSON. April 13, 1950 [April 21, 1949], No. 9153/50. Class 40 (iv). In a moving coil electro-acoustic transducer, the diaphragm 4 is completely surrounded by the magnetic circuit which is provided with holes 17 for the transmission of acoustic energy and the coil constitutes one of the windings of a transformer having an unbroken magnetic circuit which is common with the operational magnetic circuit of the transducer. In Fig. 1 the coil 5 comprises a single short-circuited turn into which currents are induced by a coil 16 wound around a common core 1. The operational air gap is between the common core 1 and an annular permanent magnet 15 which together with an insert 6 and the capsule wall 3 forms a damping chamber connecting with the space at the back of the diaphragm through holes 7 covered by silk cloth 9.
GB9153/50A 1949-04-21 1950-04-13 Electro-acoustic transducers Expired GB669883A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE669883X 1949-04-21

Publications (1)

Publication Number Publication Date
GB669883A true GB669883A (en) 1952-04-09

Family

ID=20314582

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9153/50A Expired GB669883A (en) 1949-04-21 1950-04-13 Electro-acoustic transducers

Country Status (1)

Country Link
GB (1) GB669883A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478927A1 (en) * 1980-03-20 1981-09-25 Akg Akustische Kino Geraete ELECTRO-ACOUSTIC CONVERTER OF THE ELECTRODYNAMIC TYPE
GB2118398A (en) * 1982-04-14 1983-10-26 Boaz Elieli Moving coil electroacoustic transducers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478927A1 (en) * 1980-03-20 1981-09-25 Akg Akustische Kino Geraete ELECTRO-ACOUSTIC CONVERTER OF THE ELECTRODYNAMIC TYPE
WO1981003099A1 (en) * 1980-03-20 1981-10-29 Akg Akustische Kino Geraete Electroacoustic converter with electrodynamic action
DE3050350C1 (en) * 1980-03-20 1989-05-11 Akg Akustische U. Kino-Geraete Ges.M.B.H., Wien, At
GB2118398A (en) * 1982-04-14 1983-10-26 Boaz Elieli Moving coil electroacoustic transducers

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