GB775250A - A magnetic system with closed magnetic circuit - Google Patents

A magnetic system with closed magnetic circuit

Info

Publication number
GB775250A
GB775250A GB22917/55A GB2291755A GB775250A GB 775250 A GB775250 A GB 775250A GB 22917/55 A GB22917/55 A GB 22917/55A GB 2291755 A GB2291755 A GB 2291755A GB 775250 A GB775250 A GB 775250A
Authority
GB
United Kingdom
Prior art keywords
magnetic
closed
aug
circuit
leakage flux
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
GB22917/55A
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.)
Tesla AS
Original Assignee
Tesla AS
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 Tesla AS filed Critical Tesla AS
Publication of GB775250A publication Critical patent/GB775250A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

.775,250. Permanent magnets. TESLA, NARODNI PODNIK. Aug. 9, 1955 [Aug. 18, 1954], No. 22917/55. Class 35. [Also in Group XXXIX] Leakage flux in a loud-speaker magnet is prevented by an additional magnet ring 4 polarized to oppose the leakage flux. The principle may be applied to electromagnets, dynamos, &c.
GB22917/55A 1954-08-18 1955-08-09 A magnetic system with closed magnetic circuit Expired GB775250A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS775250X 1954-08-18

Publications (1)

Publication Number Publication Date
GB775250A true GB775250A (en) 1957-05-22

Family

ID=5455461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22917/55A Expired GB775250A (en) 1954-08-18 1955-08-09 A magnetic system with closed magnetic circuit

Country Status (2)

Country Link
FR (1) FR1156815A (en)
GB (1) GB775250A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281600B (en) * 1958-06-25 1968-10-31 Magnetfab Bonn Gmbh Annular gap magnet system with high field strength in which a coil moves in the air gap
US4187444A (en) * 1978-01-19 1980-02-05 Varian Associates, Inc. Open-circuit magnet structure for cross-field tubes and the like
NL7908447A (en) * 1979-11-20 1981-06-16 Philips Nv MAGNETIC SYSTEM FOR AN ELECTROACOUSTIC CONVERTER.
FR2868870B1 (en) * 2004-04-08 2008-12-26 Schneider Electric Ind Sas ELECTRO-MAGNET WITH FIELD CONCENTRATION

Also Published As

Publication number Publication date
FR1156815A (en) 1958-05-21

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