FR770109A - Appareil acoustique - Google Patents

Appareil acoustique

Info

Publication number
FR770109A
FR770109A FR770109DA FR770109A FR 770109 A FR770109 A FR 770109A FR 770109D A FR770109D A FR 770109DA FR 770109 A FR770109 A FR 770109A
Authority
FR
France
Prior art keywords
acoustic device
acoustic
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
English (en)
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Application granted granted Critical
Publication of FR770109A publication Critical patent/FR770109A/fr
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
    • H04R9/06—Loudspeakers
    • 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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • H04R9/045—Mounting

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Circuit For Audible Band Transducer (AREA)
FR770109D 1933-03-17 1934-03-13 Appareil acoustique Expired FR770109A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US661237A US2007747A (en) 1933-03-17 1933-03-17 Acoustic apparatus

Publications (1)

Publication Number Publication Date
FR770109A true FR770109A (fr) 1934-09-08

Family

ID=24652747

Family Applications (1)

Application Number Title Priority Date Filing Date
FR770109D Expired FR770109A (fr) 1933-03-17 1934-03-13 Appareil acoustique

Country Status (9)

Country Link
US (1) US2007747A (fr)
AT (1) AT143569B (fr)
BE (1) BE402059A (fr)
CH (1) CH179149A (fr)
DE (1) DE680788C (fr)
DK (1) DK50698C (fr)
FR (1) FR770109A (fr)
GB (1) GB439561A (fr)
NL (1) NL40839C (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945568C (de) * 1937-04-30 1956-07-12 Telefunken Gmbh Lautsprecher mit zwei aus Werkstoffen verschiedener Steifigkeit und Leichtigkeit hergestellten kegelfoermigen Membranen
US2489862A (en) * 1943-01-07 1949-11-29 Gen Electric Damping for dynamic loudspeakers
US2443177A (en) * 1944-02-28 1948-06-15 Submarine Signal Co Submarine signaling apparatus
US2565069A (en) * 1946-03-30 1951-08-21 Rola Company Inc Loud-speaker of the double diaphragm type
US2534040A (en) * 1947-04-21 1950-12-12 Radio Television Inst Inc Multiple section diaphragm loud-speaker
US2645684A (en) * 1948-06-30 1953-07-14 Rca Corp Noise discriminating system
GB667170A (en) * 1948-10-29 1952-02-27 Paul Gustavus Adolphus Helmuth Improvements in moving coil loudspeakers
US2638510A (en) * 1949-01-06 1953-05-12 Caesar David Zeitouni Duplex loud-speaker
US2641329A (en) * 1950-05-29 1953-06-09 Univ Loudspeakers Inc Loud-speaker diaphragm with transversely arched stiffener means
BE519367A (fr) * 1951-12-07
DE1016754B (de) * 1953-12-07 1957-10-03 Carl Ernst Eichhorn Spulenkombination fuer magnetische und dynamische Schwingsysteme, z.B. Lautsprecher, Mikrophone, Tonabnehmer sowie fuer die Primaerseite von Ausgangsuebertragern
US2832828A (en) * 1955-09-26 1958-04-29 Arthur Blumenfeld Loudspeaker circuitry
US3350513A (en) * 1964-06-22 1967-10-31 Alfred H Roberts Cone loudspeakers
US3814857A (en) * 1969-11-04 1974-06-04 N Thomasen Two-way loudspeaker system with two tandem-connected high-range speakers
US4383134A (en) * 1980-03-10 1983-05-10 Electro Audio Dynamics, Inc. Loudspeaker systems
JPS6175696U (fr) * 1984-10-23 1986-05-21
DE3603537A1 (de) * 1986-02-05 1987-08-06 Pfleid Wohnraumakustik Gmbh Breitbandlautsprecher
US5103482A (en) * 1988-07-28 1992-04-07 Fabri Conti Lucas Apparatus and method for reproducing high fidelity sound
US10277984B2 (en) * 2016-06-21 2019-04-30 Dongguan Li Yin Technology Limited Multi-strand independent input-output voice coil

Also Published As

Publication number Publication date
DK50698C (da) 1935-09-30
US2007747A (en) 1935-07-09
BE402059A (fr)
AT143569B (de) 1935-11-25
GB439561A (en) 1935-12-10
NL40839C (fr)
DE680788C (de) 1939-09-08
CH179149A (de) 1935-08-31

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