FR1019894A - Permanent magnet for speaker - Google Patents

Permanent magnet for speaker

Info

Publication number
FR1019894A
FR1019894A FR1019894DA FR1019894A FR 1019894 A FR1019894 A FR 1019894A FR 1019894D A FR1019894D A FR 1019894DA FR 1019894 A FR1019894 A FR 1019894A
Authority
FR
France
Prior art keywords
speaker
permanent magnet
permanent
magnet
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.)
ROLA Co
Original Assignee
ROLA 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 ROLA Co filed Critical ROLA Co
Application granted granted Critical
Publication of FR1019894A publication Critical patent/FR1019894A/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
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR1019894D 1950-06-01 1950-06-09 Permanent magnet for speaker Expired FR1019894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13777/50A GB672465A (en) 1950-06-01 1950-06-01 Permanent magnet structure for a loudspeaker

Publications (1)

Publication Number Publication Date
FR1019894A true FR1019894A (en) 1953-01-27

Family

ID=10029174

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1019894D Expired FR1019894A (en) 1950-06-01 1950-06-09 Permanent magnet for speaker

Country Status (3)

Country Link
US (2) US2517727A (en)
FR (1) FR1019894A (en)
GB (1) GB672465A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974204A (en) * 1954-07-06 1961-03-07 Kane Corp Du Transducer
US2964597A (en) * 1954-12-10 1960-12-13 Rca Corp Loudspeaker magnetic field structure
USRE26030E (en) * 1956-02-28 1966-05-24 Dynamic transducer
US4327257A (en) * 1979-09-10 1982-04-27 Schwartz Leslie H Alignment device for electro-acoustical transducers
US6963652B1 (en) 2003-04-18 2005-11-08 James M Colombo Low frequency generator
FR2865608B1 (en) * 2004-01-23 2007-02-09 Robert Rigondeau ELECTOACOUSTIC TRANSDUCER AND SPEAKER COMPRISING IT
US20070242849A1 (en) * 2006-04-13 2007-10-18 Galax Multimedia Co., Ltd. Loudspeaker with high power efficiency and low resonance frequency
US7675202B1 (en) 2007-07-18 2010-03-09 Benjamin Huang Isotropic ring magnet linear voice coil motor
US9699565B2 (en) * 2014-12-07 2017-07-04 Cardas Audio Ltd. Loudspeaker using contour field hard magnet poles and yoke construction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB297183A (en) * 1927-07-21 1928-09-20 British Thomson Houston Co Ltd Improvements relating to devices for the interconversion of electrical and mechanical vibrations, such as loud-speakers
US1955248A (en) * 1928-04-18 1934-04-17 Messick Charies Magnetic movement
US1918164A (en) * 1929-09-10 1933-07-11 William L Woolf Acoustic device
BE414989A (en) * 1935-04-13
US2458158A (en) * 1942-11-25 1949-01-04 Permoflux Corp Magnetically shielded electrodynamic sound reproducer

Also Published As

Publication number Publication date
GB672465A (en) 1952-05-21
USRE23856E (en) 1954-07-27
US2517727A (en) 1950-08-08

Similar Documents

Publication Publication Date Title
FR1007498A (en) Composition for magnetic cores
FR1099244A (en) Compositions for permanent waves
FR1019894A (en) Permanent magnet for speaker
FR1075776A (en) Foundry core
FR1023486A (en) Magnetic tie holder
FR1024291A (en) Advanced loudspeaker horn
AT174515B (en) Magnetic clamping device
FR1013025A (en) Magnetic switch
FR1029480A (en) Advanced permanent magnet holder
FR1035489A (en) Permanent magnet alloy
AT170682B (en) Lifting magnet
FR1027046A (en) Animated subjects for magnetization
AT172574B (en) AC magnet
FR980590A (en) Double permanent magnet
FR1061276A (en) Alloy for permanent magnets
AT186077B (en) Permanent magnetic filter
FR1080515A (en) Permanent anisotropic magnet
FR1061712A (en) Device for magnetic reproduction
AT170010B (en) Magnetic sound carrier
FR60467E (en) Magnetic switch
FR993144A (en) Magnetic modulator
FR1042816A (en) Phonograph
AT169455B (en) Speaker arrangement
FI23290A (en) Procedure for making permanent magnets
DK84865C (en) Permanent magnet.