GB1146721A - Method of forming field structure for magnetic loudspeaker - Google Patents

Method of forming field structure for magnetic loudspeaker

Info

Publication number
GB1146721A
GB1146721A GB30009/66A GB3000966A GB1146721A GB 1146721 A GB1146721 A GB 1146721A GB 30009/66 A GB30009/66 A GB 30009/66A GB 3000966 A GB3000966 A GB 3000966A GB 1146721 A GB1146721 A GB 1146721A
Authority
GB
United Kingdom
Prior art keywords
diameter
workpiece
forming
lip
housing
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
GB30009/66A
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.)
ALDO LUDOVICO COEN
Original Assignee
ALDO LUDOVICO COEN
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 ALDO LUDOVICO COEN filed Critical ALDO LUDOVICO COEN
Publication of GB1146721A publication Critical patent/GB1146721A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Forging (AREA)
GB30009/66A 1965-07-20 1966-07-04 Method of forming field structure for magnetic loudspeaker Expired GB1146721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US473396A US3367165A (en) 1965-07-20 1965-07-20 Method for forming a field structure for magnetic loudspeaker

Publications (1)

Publication Number Publication Date
GB1146721A true GB1146721A (en) 1969-03-26

Family

ID=23879351

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30009/66A Expired GB1146721A (en) 1965-07-20 1966-07-04 Method of forming field structure for magnetic loudspeaker

Country Status (3)

Country Link
US (1) US3367165A (enrdf_load_stackoverflow)
GB (1) GB1146721A (enrdf_load_stackoverflow)
NL (1) NL6610234A (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732836A (en) * 1971-09-17 1973-05-15 Gen Motors Corp Method of manufacturing drawn cup bearing races with crowned pathways
JPS5584238A (en) * 1978-12-21 1980-06-25 Sanden Corp Production of magnetic circuit part of solenoid clutch
US4452062A (en) * 1980-03-08 1984-06-05 Ishizaki Press Kogyo Co., Ltd. Method of manufacturing battery lid
US20070242849A1 (en) * 2006-04-13 2007-10-18 Galax Multimedia Co., Ltd. Loudspeaker with high power efficiency and low resonance frequency
CN104056907A (zh) * 2014-06-27 2014-09-24 梧州恒声电子科技有限公司 喇叭盆架的加工方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1142782A (en) * 1914-12-03 1915-06-08 Rockwood Sprinkler Co Set of dies.
US1427315A (en) * 1919-09-10 1922-08-29 Boston Pressed Metal Company Method of forming an article of sheet metal
US1397360A (en) * 1919-11-22 1921-11-15 Rockwood Sprinkler Co Method of making handles and the like
US2722047A (en) * 1951-05-05 1955-11-01 Walter F Cousino Production of precision bushings
US3191421A (en) * 1961-03-30 1965-06-29 Aldo L Coen Method of making loudspeaker field structure
US3138864A (en) * 1961-05-25 1964-06-30 Aldo L Coen Method of working metal

Also Published As

Publication number Publication date
NL6610234A (enrdf_load_stackoverflow) 1967-01-23
US3367165A (en) 1968-02-06

Similar Documents

Publication Publication Date Title
GB1071961A (en) Receptacle and method and apparatus for making the same
GB625011A (en) Improvements in or relating to a method and apparatus for the manufacture of hollow metal articles
GB1146721A (en) Method of forming field structure for magnetic loudspeaker
GB836706A (en) Improvements relating to the production of hollow metal bodies by pressing
CN112719061B (zh) 电控助力器壳体上内翻孔口带倒角面的小孔的成型工艺
US3191421A (en) Method of making loudspeaker field structure
GB792242A (en) Method of and apparatus for manufacturing seamless hollow parts open at one end
GB1162388A (en) A method of producing an internally screw-threaded nut from sheet metal, and an automatic machine for use in carrying out said method.
US1651111A (en) Forming metal
GB497270A (en) Improvements in or relating to a method of producing thick-walled cup-shaped hollow metal bodies
GB998666A (en) Core box vent
GB1094177A (en) Can with integral pull tab and method of making same
GB625919A (en) Improvements in and relating to the manufacture of metal shells by impact extrusion
SU1571874A1 (ru) Способ выдавливания полых ступенчатых изделий с головкой, имеющей фланец, и с хвостовиком
GB1325145A (en) Pull rings for opening receptacles
US3138864A (en) Method of working metal
US2020740A (en) Process of making bezels
GB1231177A (enrdf_load_stackoverflow)
GB1341141A (en) Production of hollow metal bodies closed at one end
GB922328A (en) Improvements in or relating to methods of producing annular and solid blanks
CN107812836A (zh) 一种音箱盆架连续冲压模具及工艺
GB767854A (en) Improvements in or relating to cold-pressing hard metals for producing cup-shaped articles
GB829049A (en) Improvements in method for forming slip rings
GB1315058A (en) Device for the drawing of metal cups
GB1185534A (en) A Method of Forming Receptacles