GB1177804A - Improvements in or relating to methods of manufacturing Loudspeaker Pots from a piece of Soft Iron - Google Patents
Improvements in or relating to methods of manufacturing Loudspeaker Pots from a piece of Soft IronInfo
- Publication number
- GB1177804A GB1177804A GB898367A GB898367A GB1177804A GB 1177804 A GB1177804 A GB 1177804A GB 898367 A GB898367 A GB 898367A GB 898367 A GB898367 A GB 898367A GB 1177804 A GB1177804 A GB 1177804A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pots
- stage
- soft iron
- open end
- relating
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, 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 OR PROFILES, 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)
Abstract
1,177,804. Making loud-speaker pots. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 24 Feb., 1967 [1 March, 1966], No. 8983/67. Headings B3A and B3H. A loud-speaker pot 1 is made from a workpiece of soft iron entirely by pressing operations. In the first stage a solid workpiece is pierced and backwardly extruded, Fig. 1 (not shown). In a second stage, Fig. 2 (not shown), the open end of the cup-shaped workpiece is reduced in diameter. In a third stage, Fig. 3 (not shown), the open end is upset to provide a thick flange 12 and in the final stage the open end is shaped by punch 3 and ejector 9 and the closed bottom is flattened and calibrated.
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 |
---|---|
GB1177804A true GB1177804A (en) | 1970-01-14 |
Family
ID=19795863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB898367A Expired GB1177804A (en) | 1966-03-01 | 1967-02-24 | Improvements in or relating to methods of manufacturing Loudspeaker Pots 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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106583485A (en) * | 2016-12-22 | 2017-04-26 | 南昌工程学院 | Forming method for large-diameter flange air cylinder |
-
1966
- 1966-03-01 NL NL6602605A patent/NL6602605A/xx unknown
-
1967
- 1967-02-24 GB GB898367A patent/GB1177804A/en not_active Expired
- 1967-02-25 DE DE1967N0030066 patent/DE1275612B/en active Pending
- 1967-02-27 AT AT189667A patent/AT274532B/en active
- 1967-02-27 BE BE694726D patent/BE694726A/xx unknown
- 1967-02-27 CH CH281367A patent/CH446863A/en unknown
- 1967-02-27 ES ES337320A patent/ES337320A1/en not_active Expired
- 1967-03-01 FR FR97005A patent/FR1512899A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106583485A (en) * | 2016-12-22 | 2017-04-26 | 南昌工程学院 | Forming method for large-diameter flange air cylinder |
Also Published As
Publication number | Publication date |
---|---|
ES337320A1 (en) | 1968-06-01 |
FR1512899A (en) | 1968-02-09 |
AT274532B (en) | 1969-09-25 |
BE694726A (en) | 1967-08-28 |
DE1275612B (en) | 1968-08-22 |
NL6602605A (en) | 1967-09-04 |
CH446863A (en) | 1967-11-15 |
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