GB872194A - Improvements in or relating to magnet systems - Google Patents

Improvements in or relating to magnet systems

Info

Publication number
GB872194A
GB872194A GB1030560A GB1030560A GB872194A GB 872194 A GB872194 A GB 872194A GB 1030560 A GB1030560 A GB 1030560A GB 1030560 A GB1030560 A GB 1030560A GB 872194 A GB872194 A GB 872194A
Authority
GB
United Kingdom
Prior art keywords
magnet
main magnet
housing
march
speaker
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
GB1030560A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB872194A publication Critical patent/GB872194A/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
    • 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

Abstract

872,194. Permanent magnets. PHILIPS ELECTRICAL INDUSTRIES Ltd. March 23, 1960 [March 26, 1959], No. 10305/60. Class 35. [Also in Group XXXIX] To reduce leakage flux in a permanent magnet assembly for a loud-speaker an auxiliary magnet 5, either annular or disc-shaped, and polarized oppositely to the main magnet 3, is arranged close to the end-plate 2 but separated from it by an air gap 6. Its effect may be increased by the addition of a ferromagnetic housing 7. The auxiliary magnet and the housing may be added after the main magnet parts have been assembled with the speaker and magnetized. The main magnet may be surrounded by a synthetic resin to present a smooth, cylindrical surface to the housing 7. Both magnets are preferably of ceramic material, the main magnet at least being anisotropic.
GB1030560A 1959-03-26 1960-03-23 Improvements in or relating to magnet systems Expired GB872194A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL237584 1959-03-26

Publications (1)

Publication Number Publication Date
GB872194A true GB872194A (en) 1961-07-05

Family

ID=19751637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1030560A Expired GB872194A (en) 1959-03-26 1960-03-23 Improvements in or relating to magnet systems

Country Status (7)

Country Link
BE (1) BE588998A (en)
CH (1) CH387104A (en)
DE (1) DE1851679U (en)
ES (1) ES256749A1 (en)
FR (1) FR1251911A (en)
GB (1) GB872194A (en)
NL (1) NL237584A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407371A (en) * 1965-06-04 1968-10-22 Gen Motors Corp Loudspeaker magnet structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407371A (en) * 1965-06-04 1968-10-22 Gen Motors Corp Loudspeaker magnet structure

Also Published As

Publication number Publication date
FR1251911A (en) 1961-01-20
NL237584A (en)
ES256749A1 (en) 1960-06-01
CH387104A (en) 1965-01-31
DE1851679U (en) 1962-05-17
BE588998A (en) 1960-09-26

Similar Documents

Publication Publication Date Title
GB927545A (en) Improvements in magnet systems
GB708136A (en) Improvements in or relating to magnetic circuits comprising a highly-permeable part and a substantially flat thin permanent magnet
GB860439A (en) Improvements in or relating to magnetic arrangements
ES429936A1 (en) Permanent magnet holding system
GB1009753A (en) Magnetic suspension for a rotor shaft
GB1360606A (en) Magnetic systems
GB931807A (en) Improvements in or relating to electro-mechanical transducers using the hall effect
GB1409789A (en) Magnet assembly
GB1460744A (en) Loud speakers of the moving coil type
GB872194A (en) Improvements in or relating to magnet systems
ES256230A1 (en) Axial air-gap electrical machine
GB766857A (en) Improvements in or relating to magnetic electron lenses
GB1164307A (en) Magnets.
GB804638A (en) Improvements relating to filtering apparatus
GB852714A (en) Improvements in or relating to magnetic gripping devices
GB888632A (en) Improvements in or relating to arrangements for the storage and transmission of signals
GB1296614A (en)
ES329359A1 (en) Adhesive relay with vibrating armor contacts. (Machine-translation by Google Translate, not legally binding)
GB775250A (en) A magnetic system with closed magnetic circuit
GB841894A (en) Improvements in or relating to arresters for iron particles
GB893838A (en) Improvements relating to loudspeakers
GB876291A (en) Improvements in or relating to permanent magnets
GB858977A (en) Improvements in or relating to magnetic structures including a permanent magnet
GB767309A (en) Improvements in or relating to moving coil type loudspeakers
GB1360953A (en) Magnetic anchoring device for use in the graphic arts