GB243431A - Improvements in and connected with telephonic receivers - Google Patents
Improvements in and connected with telephonic receiversInfo
- Publication number
- GB243431A GB243431A GB20168/24A GB2016824A GB243431A GB 243431 A GB243431 A GB 243431A GB 20168/24 A GB20168/24 A GB 20168/24A GB 2016824 A GB2016824 A GB 2016824A GB 243431 A GB243431 A GB 243431A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pieces
- yoke
- pole
- spool
- pole pieces
- 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
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
- H04R13/02—Telephone receivers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electromagnets (AREA)
Abstract
243,431. Midgley, A. H. Aug. 26, 1924. Magnetic instruments.-A telephone receiver, more particularly of the loud-speaker type, has its laminated pole pieces c secured against the inner ends of yoke pieces n, n<1>, secured by bolts o, o<1> between bar magnets m, by means of wedgemembers 5, 6 drawn together by a screw 7 and coacting with wedge surfaces 3, 4 on the lower ends of the pole piece. If desired-, the outer surfaces of the pole pieces may also be provided with similar wedge surfaces, the inner edges of the yoke pieces being shaped to correspond. The pole pieces c can be adjusted with respect to the diaphragm b by the means described in Specification 243,432, which consists in pivotally mounting the magnet structure at one end about the bolt o and providing the yoke piece n<1> at the other end with a prolongation s adapted to be acted on by an adjusting screw w against the action of a spring t. The laminae forming each pole piece c may be bound around the bottom and sides by a non-magnetic strip 8, Fig. 4, which is shouldered at 9 to support the spool of the coil 2 and has its ends bent over at 10 to engage the upper end of the spool.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB20168/24A GB243431A (en) | 1924-08-26 | 1924-08-26 | Improvements in and connected with telephonic receivers |
| US52431A US1602696A (en) | 1924-08-26 | 1925-08-25 | Telephonic receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB20168/24A GB243431A (en) | 1924-08-26 | 1924-08-26 | Improvements in and connected with telephonic receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB243431A true GB243431A (en) | 1925-11-26 |
Family
ID=10141499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20168/24A Expired GB243431A (en) | 1924-08-26 | 1924-08-26 | Improvements in and connected with telephonic receivers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1602696A (en) |
| GB (1) | GB243431A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2505519A (en) * | 1945-03-08 | 1950-04-25 | Us Executive Secretary Of The | Pressure-compensated telephone unit |
| US2567365A (en) * | 1948-08-04 | 1951-09-11 | Bell Telephone Labor Inc | Polarized operator for telephone receivers |
-
1924
- 1924-08-26 GB GB20168/24A patent/GB243431A/en not_active Expired
-
1925
- 1925-08-25 US US52431A patent/US1602696A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1602696A (en) | 1926-10-12 |
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