NL40839C - - Google Patents

Info

Publication number
NL40839C
NL40839C NL40839DA NL40839C NL 40839 C NL40839 C NL 40839C NL 40839D A NL40839D A NL 40839DA NL 40839 C NL40839 C NL 40839C
Authority
NL
Netherlands
Application number
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 NL40839C publication Critical patent/NL40839C/xx

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)
NL40839D 1933-03-17 NL40839C (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
NL40839C true NL40839C (fr)

Family

ID=24652747

Family Applications (1)

Application Number Title Priority Date Filing Date
NL40839D NL40839C (fr) 1933-03-17

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
DE680788C (de) 1939-09-08
DK50698C (da) 1935-09-30
BE402059A (fr)
US2007747A (en) 1935-07-09
GB439561A (en) 1935-12-10
CH179149A (de) 1935-08-31
FR770109A (fr) 1934-09-08
AT143569B (de) 1935-11-25

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