CH446863A - Process for the production of a loudspeaker bowl from a piece of soft iron - Google Patents

Process for the production of a loudspeaker bowl from a piece of soft iron

Info

Publication number
CH446863A
CH446863A CH281367A CH281367A CH446863A CH 446863 A CH446863 A CH 446863A CH 281367 A CH281367 A CH 281367A CH 281367 A CH281367 A CH 281367A CH 446863 A CH446863 A CH 446863A
Authority
CH
Switzerland
Prior art keywords
piece
production
soft iron
loudspeaker bowl
loudspeaker
Prior art date
Application number
CH281367A
Other languages
German (de)
Inventor
Jozef Dompas Ernest
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of CH446863A publication Critical patent/CH446863A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/20—Making uncoated products by backward extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/14—Making other products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • 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
    • H04R2209/024—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; 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

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Forging (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
CH281367A 1966-03-01 1967-02-27 Process for the production of a loudspeaker bowl from a piece of soft iron CH446863A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6602605A NL6602605A (en) 1966-03-01 1966-03-01

Publications (1)

Publication Number Publication Date
CH446863A true CH446863A (en) 1967-11-15

Family

ID=19795863

Family Applications (1)

Application Number Title Priority Date Filing Date
CH281367A CH446863A (en) 1966-03-01 1967-02-27 Process for the production of a loudspeaker bowl from a piece of soft iron

Country Status (8)

Country Link
AT (1) AT274532B (en)
BE (1) BE694726A (en)
CH (1) CH446863A (en)
DE (1) DE1275612B (en)
ES (1) ES337320A1 (en)
FR (1) FR1512899A (en)
GB (1) GB1177804A (en)
NL (1) NL6602605A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106583485B (en) * 2016-12-22 2018-03-02 南昌工程学院 The manufacturing process of Big Diameter Flange cylinder

Also Published As

Publication number Publication date
GB1177804A (en) 1970-01-14
FR1512899A (en) 1968-02-09
DE1275612B (en) 1968-08-22
AT274532B (en) 1969-09-25
BE694726A (en) 1967-08-28
NL6602605A (en) 1967-09-04
ES337320A1 (en) 1968-06-01

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