FR572293A - Loud speaker - Google Patents

Loud speaker

Info

Publication number
FR572293A
FR572293A FR572293DA FR572293A FR 572293 A FR572293 A FR 572293A FR 572293D A FR572293D A FR 572293DA FR 572293 A FR572293 A FR 572293A
Authority
FR
France
Prior art keywords
loud speaker
loud
speaker
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR572293A publication Critical patent/FR572293A/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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR572293D 1922-09-13 1923-09-01 Loud speaker Expired FR572293A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US588088A US1752909A (en) 1922-09-13 1922-09-13 Loud-speaker

Publications (1)

Publication Number Publication Date
FR572293A true FR572293A (en) 1924-06-03

Family

ID=24352439

Family Applications (1)

Application Number Title Priority Date Filing Date
FR572293D Expired FR572293A (en) 1922-09-13 1923-09-01 Loud speaker

Country Status (3)

Country Link
US (1) US1752909A (en)
FR (1) FR572293A (en)
GB (1) GB204023A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951190A (en) * 1954-10-28 1960-08-30 Baermann Max Electro-mechanical transformer

Also Published As

Publication number Publication date
US1752909A (en) 1930-04-01
GB204023A (en) 1924-07-31

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