GB236680A - Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof - Google Patents
Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereofInfo
- Publication number
- GB236680A GB236680A GB9851/24A GB985124A GB236680A GB 236680 A GB236680 A GB 236680A GB 9851/24 A GB9851/24 A GB 9851/24A GB 985124 A GB985124 A GB 985124A GB 236680 A GB236680 A GB 236680A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- strip
- pole
- bent
- shaped
- 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
- 238000004519 manufacturing process Methods 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
- H04R13/02—Telephone receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
- H04R7/22—Clamping rim of diaphragm or cone against seating
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Multimedia (AREA)
- Magnetic Treatment Devices (AREA)
- Coils Or Transformers For Communication (AREA)
- Electromagnets (AREA)
Abstract
236,680. British Thomson-Houston Co., Ltd., and Young, A. P. April 17, 1924. Magnets for telephone and like instruments. Each pole-piece is constituted by a strip of magnetic material shaped to fit closely against opposite sides of the end of the permanent magnet and pressed thereon to ensure a firm connection. In one construction, Fig. 1, a flat strip of soft iron is bent to provide a U-shaped portion 13 fitting around the end, preferably roughened, of the magnet 13, preferably of cobalt steel, and an extension of one limb of the U is bent at right angles to provide the coil-receiving ends 12. The part 18 is preferably spaced from the magnet as shown. In another construction, Fig. 2, stampings, about 0.04 in. thick, are made with ends shaped as above and an integral connecting strip 19, and are riveted together in number sufficient to provide a suitable width of pole-piece. The whole is pressed firmly on to the ends of the magnet, whereupon the strips 19 are machined away- Specification 23938/14 is referred to.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9851/24A GB236680A (en) | 1924-04-17 | 1924-04-17 | Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof |
| US22973A US1628383A (en) | 1924-04-17 | 1925-04-14 | Telephone receiver |
| FR598053D FR598053A (en) | 1924-04-17 | 1925-04-16 | Improvements to electromagnetic devices with pole pieces, such as telephone receivers or transmitters |
| GB15094/25A GB258000A (en) | 1924-04-17 | 1925-06-10 | Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof |
| FR31850D FR31850E (en) | 1924-04-17 | 1926-04-30 | Improvements to electromagnetic devices with pole pieces, such as telephone receivers or transmitters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9851/24A GB236680A (en) | 1924-04-17 | 1924-04-17 | Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB236680A true GB236680A (en) | 1925-07-16 |
Family
ID=9879979
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9851/24A Expired GB236680A (en) | 1924-04-17 | 1924-04-17 | Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof |
| GB15094/25A Expired GB258000A (en) | 1924-04-17 | 1925-06-10 | Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15094/25A Expired GB258000A (en) | 1924-04-17 | 1925-06-10 | Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1628383A (en) |
| FR (2) | FR598053A (en) |
| GB (2) | GB236680A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2566604A (en) * | 1948-03-16 | 1951-09-04 | William C Eaves | Electrodynamic loud-speaker assembly |
| US2522266A (en) * | 1948-05-25 | 1950-09-12 | Beltone Hearing Aid Co | Magnetic receiver |
-
1924
- 1924-04-17 GB GB9851/24A patent/GB236680A/en not_active Expired
-
1925
- 1925-04-14 US US22973A patent/US1628383A/en not_active Expired - Lifetime
- 1925-04-16 FR FR598053D patent/FR598053A/en not_active Expired
- 1925-06-10 GB GB15094/25A patent/GB258000A/en not_active Expired
-
1926
- 1926-04-30 FR FR31850D patent/FR31850E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB258000A (en) | 1926-09-10 |
| US1628383A (en) | 1927-05-10 |
| FR598053A (en) | 1925-12-05 |
| FR31850E (en) | 1927-06-13 |
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