FR647892A - Electro-magnetic sound reproducer - Google Patents

Electro-magnetic sound reproducer

Info

Publication number
FR647892A
FR647892A FR647892DA FR647892A FR 647892 A FR647892 A FR 647892A FR 647892D A FR647892D A FR 647892DA FR 647892 A FR647892 A FR 647892A
Authority
FR
France
Prior art keywords
electro
sound reproducer
magnetic sound
magnetic
reproducer
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.)
Federal Telegraph Co
Original Assignee
Federal Telegraph Co
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 Federal Telegraph Co filed Critical Federal Telegraph Co
Application granted granted Critical
Publication of FR647892A publication Critical patent/FR647892A/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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • 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
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/041—Centering
    • 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
    • H04R9/06—Loudspeakers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR647892D 1927-01-18 1928-01-17 Electro-magnetic sound reproducer Expired FR647892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US161824A US1637119A (en) 1927-01-18 1927-01-18 Electromagnetic sound reproducer

Publications (1)

Publication Number Publication Date
FR647892A true FR647892A (en) 1928-12-03

Family

ID=22582902

Family Applications (1)

Application Number Title Priority Date Filing Date
FR647892D Expired FR647892A (en) 1927-01-18 1928-01-17 Electro-magnetic sound reproducer

Country Status (6)

Country Link
US (2) US1637119A (en)
BE (1) BE348263A (en)
DE (1) DE517895C (en)
FR (1) FR647892A (en)
GB (1) GB276900A (en)
NL (1) NL23822C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5527702A (en) * 1978-08-18 1980-02-28 Sony Corp Vibrator for speaker

Also Published As

Publication number Publication date
DE517895C (en) 1931-02-07
BE348263A (en)
US1637119A (en) 1927-07-26
USRE17086E (en) 1928-09-18
GB276900A (en) 1927-09-08
NL23822C (en)

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