GB351723A - Improvements in or relating to permanent magnets for electrodynamic loud-speakers - Google Patents

Improvements in or relating to permanent magnets for electrodynamic loud-speakers

Info

Publication number
GB351723A
GB351723A GB17943/30A GB1794330A GB351723A GB 351723 A GB351723 A GB 351723A GB 17943/30 A GB17943/30 A GB 17943/30A GB 1794330 A GB1794330 A GB 1794330A GB 351723 A GB351723 A GB 351723A
Authority
GB
United Kingdom
Prior art keywords
aperture
apertures
core
magnet
shaped
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
GB17943/30A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB351723A publication Critical patent/GB351723A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0273—Magnetic circuits with PM for magnetic field generation
    • H01F7/0289—Transducers, loudspeakers, moving coil arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
GB17943/30A 1929-06-22 1930-06-11 Improvements in or relating to permanent magnets for electrodynamic loud-speakers Expired GB351723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL351723X 1929-06-22

Publications (1)

Publication Number Publication Date
GB351723A true GB351723A (en) 1931-07-02

Family

ID=19785063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17943/30A Expired GB351723A (en) 1929-06-22 1930-06-11 Improvements in or relating to permanent magnets for electrodynamic loud-speakers

Country Status (4)

Country Link
BE (1) BE370722A (enrdf_load_stackoverflow)
FR (1) FR696323A (enrdf_load_stackoverflow)
GB (1) GB351723A (enrdf_load_stackoverflow)
NL (1) NL32105C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547565A (en) * 1946-09-26 1951-04-03 Wright Zimmerman Inc Speaker having a tubular pot

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547565A (en) * 1946-09-26 1951-04-03 Wright Zimmerman Inc Speaker having a tubular pot

Also Published As

Publication number Publication date
NL32105C (enrdf_load_stackoverflow)
FR696323A (fr) 1930-12-29
BE370722A (enrdf_load_stackoverflow)

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