GB399296A - Improvements in or relating to the manufacture of loud speakers - Google Patents
Improvements in or relating to the manufacture of loud speakersInfo
- Publication number
- GB399296A GB399296A GB20116/32A GB2011632A GB399296A GB 399296 A GB399296 A GB 399296A GB 20116/32 A GB20116/32 A GB 20116/32A GB 2011632 A GB2011632 A GB 2011632A GB 399296 A GB399296 A GB 399296A
- Authority
- GB
- United Kingdom
- Prior art keywords
- openings
- coil
- former
- winding
- loud
- 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
-
- 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
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
399,296. Loud-speakers. ROLA CO., Cleveland, Ohio, U.S.A.-(Assignees of Engholm, B. A.; 12065, Edgewater Drive, Lakewood, Ohio, U.S.A.) July 15, 1932, No. 20116. Convention date, Sept. 29, 1931. [Class 40 (iv).] The coil-carrying former of a moving coil loud-speaker is formed by bending a rectangular strip of paper 20, Fig. 2, into the shape of a cylinder, the tab 21 registering with the notch 22. The cylinder is then placed in a mould 25, Fig. 3, having grooves 26, 27 and a plunger 45 having a soft rubber head 46 is forced into the mould so as to produce a rib 31 and bead 30, Fig. 4, in the former the space 32 between which forms a groove in which the coil is wound. The strip 20 is provided with pairs of openings 23, 24 so arranged that the openings 23 are located on the opposite side of the rib 31 to the openings 24, as shown in Fig. 4. In winding the coil, one end of the wire is passed through one set of perforations 23, 24 so as to hold it against movement during the winding operation, the opposite end of the wire being passed through the other set of openings when the winding is completed. The end portion 38 of the former is secured in a metallic ring 35 on the centring spider 16, Fig. 1, together with tabs on the inner end of the core 10 by a metal ring 40, 41, the whole being cemented together. United States Specification 1,891,404 is referred to.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US457552A US1891404A (en) | 1930-05-30 | 1930-05-30 | Loud speaker |
| US565724A US1872261A (en) | 1930-05-30 | 1931-09-29 | Method of making loud speakers |
| US628579A US1918092A (en) | 1930-05-30 | 1932-08-12 | Loud speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB399296A true GB399296A (en) | 1933-10-05 |
Family
ID=27412706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20116/32A Expired GB399296A (en) | 1930-05-30 | 1932-07-15 | Improvements in or relating to the manufacture of loud speakers |
Country Status (2)
| Country | Link |
|---|---|
| US (3) | US1891404A (en) |
| GB (1) | GB399296A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2591881A (en) * | 1947-02-28 | 1952-04-08 | Barton T Setchell | Method of making radio speakers |
| US2524836A (en) * | 1947-04-02 | 1950-10-10 | Rola Company Inc | Permanent magnet electrodynamic loud-speaker |
| US2699472A (en) * | 1950-07-21 | 1955-01-11 | Rca Corp | Coaxial, dual unit, electrodynamic loud-speaker |
| US2674659A (en) * | 1951-11-02 | 1954-04-06 | Bell Telephone Labor Inc | Magnetic head and method of making same |
| DE69530685T2 (en) | 1994-03-29 | 2004-04-22 | Harman International Industries, Inc., Northridge | METHOD FOR PRODUCING A SPEAKER DAMPER |
| KR100491644B1 (en) * | 2003-03-13 | 2005-05-27 | 에스텍 주식회사 | Speaker |
| US7155028B2 (en) * | 2004-11-24 | 2006-12-26 | Sonodyne Taiwan Co., Ltd. | Voice coil mounting structure |
| CN204795584U (en) * | 2015-06-25 | 2015-11-18 | 国光电器股份有限公司 | Pin configuration of speaker |
-
1930
- 1930-05-30 US US457552A patent/US1891404A/en not_active Expired - Lifetime
-
1931
- 1931-09-29 US US565724A patent/US1872261A/en not_active Expired - Lifetime
-
1932
- 1932-07-15 GB GB20116/32A patent/GB399296A/en not_active Expired
- 1932-08-12 US US628579A patent/US1918092A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1891404A (en) | 1932-12-20 |
| US1872261A (en) | 1932-08-16 |
| US1918092A (en) | 1933-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB399296A (en) | Improvements in or relating to the manufacture of loud speakers | |
| US1956826A (en) | Method of making alpha voice coil | |
| US2470408A (en) | Frame for dynamoelectric machines | |
| US1633583A (en) | Electric bell | |
| US1404934A (en) | Spool flange | |
| JPS5836144A (en) | Core for shading coil induction motor | |
| JPS5934095Y2 (en) | Trance | |
| GB275161A (en) | Improvements in and relating to loud speakers | |
| GB567030A (en) | Improvements in and relating to insulated coils and methods of making same | |
| GB550467A (en) | Improvements in or relating to tire bead reinforcements and method of making same | |
| GB624137A (en) | Improvements in and relating to magnetic cores | |
| US2097778A (en) | Film reel construction | |
| US2239725A (en) | Spool | |
| GB543004A (en) | Improvements relating to the production of induction apparatus with rolled strip cores | |
| JPS5823255U (en) | Take-up reel for magnetic thin strip manufactured by molten metal quenching method | |
| GB621704A (en) | Improvements in and relating to magnetic cores | |
| JPS5820371Y2 (en) | Multi-stage print head | |
| GB749427A (en) | Method of producing piston rings | |
| JPS6035207Y2 (en) | coil device | |
| JPS5847814Y2 (en) | rotor | |
| GB802253A (en) | Improvements in tire bead construction | |
| GB429624A (en) | Improvements in moving coil loudspeakers | |
| GB406951A (en) | Improvements in and relating to cores for dynamo electric machines and methods of making the same | |
| GB687610A (en) | Improvements in or relating to machines for making magnetic cores for electrical transformers | |
| GB381803A (en) | Improvements in or relating to the actuating members of electrodynamic loudspeakers,microphones and the like and the method of manufacturing such members |