JPS51115817A - Magnet plate for electro-acoustic transducing and the method of its ma nufacture - Google Patents

Magnet plate for electro-acoustic transducing and the method of its ma nufacture

Info

Publication number
JPS51115817A
JPS51115817A JP4025075A JP4025075A JPS51115817A JP S51115817 A JPS51115817 A JP S51115817A JP 4025075 A JP4025075 A JP 4025075A JP 4025075 A JP4025075 A JP 4025075A JP S51115817 A JPS51115817 A JP S51115817A
Authority
JP
Japan
Prior art keywords
nufacture
electro
magnet plate
acoustic transducing
transducing
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.)
Granted
Application number
JP4025075A
Other languages
Japanese (ja)
Other versions
JPS5442609B2 (en
Inventor
Toyosaku Matsumoto
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP4025075A priority Critical patent/JPS51115817A/en
Priority to GB1329476A priority patent/GB1524124A/en
Priority to CA249,429A priority patent/CA1090086A/en
Publication of JPS51115817A publication Critical patent/JPS51115817A/en
Publication of JPS5442609B2 publication Critical patent/JPS5442609B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Powder Metallurgy (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

PURPOSE: To uplevel the reliability of the magner plate by pressing it with adequate pressure, at the same time intensifying the strength.
COPYRIGHT: (C)1976,JPO&Japio
JP4025075A 1975-04-04 1975-04-04 Magnet plate for electro-acoustic transducing and the method of its ma nufacture Granted JPS51115817A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP4025075A JPS51115817A (en) 1975-04-04 1975-04-04 Magnet plate for electro-acoustic transducing and the method of its ma nufacture
GB1329476A GB1524124A (en) 1975-04-04 1976-04-01 Method for producing a magnetic powder
CA249,429A CA1090086A (en) 1975-04-04 1976-04-02 Method for producing a magnet plate for electroacoustic transducers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4025075A JPS51115817A (en) 1975-04-04 1975-04-04 Magnet plate for electro-acoustic transducing and the method of its ma nufacture

Publications (2)

Publication Number Publication Date
JPS51115817A true JPS51115817A (en) 1976-10-12
JPS5442609B2 JPS5442609B2 (en) 1979-12-15

Family

ID=12575442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4025075A Granted JPS51115817A (en) 1975-04-04 1975-04-04 Magnet plate for electro-acoustic transducing and the method of its ma nufacture

Country Status (3)

Country Link
JP (1) JPS51115817A (en)
CA (1) CA1090086A (en)
GB (1) GB1524124A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54145958A (en) * 1978-05-09 1979-11-14 Yokohama Kagaku Kinzoku Kk Method of producing porous magnet and mold used for executing same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2016502A6 (en) * 1989-08-31 1990-11-01 Uralita Sa Ceramic tile.
GB2315266B (en) * 1996-07-12 1999-11-17 Ibm Magnet and method for manufacturing a magnet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54145958A (en) * 1978-05-09 1979-11-14 Yokohama Kagaku Kinzoku Kk Method of producing porous magnet and mold used for executing same

Also Published As

Publication number Publication date
GB1524124A (en) 1978-09-06
JPS5442609B2 (en) 1979-12-15
CA1090086A (en) 1980-11-25

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