GB257651A - Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations - Google Patents
Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillationsInfo
- Publication number
- GB257651A GB257651A GB1374525A GB1374525A GB257651A GB 257651 A GB257651 A GB 257651A GB 1374525 A GB1374525 A GB 1374525A GB 1374525 A GB1374525 A GB 1374525A GB 257651 A GB257651 A GB 257651A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- gramophones
- records
- converting
- corresponding electric
- 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
- 230000010355 oscillation Effects 0.000 title 1
- 239000000696 magnetic material Substances 0.000 abstract 2
- 229910000831 Steel Inorganic materials 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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
257,651. British Thomson-Houston Co., Ltd., Butcher, J. H., and Wills, F. P. May 26, 1925. Magnetic instruments. - An electromagnetic transmitter operated by a gramophone or like needle is arranged as a complete unit detachably carried by the tone-arm. In the reproducer shown in Fig. 1, a flat annual magnet 11, which may consist of radial arms, is surrounded by a tube 12 of magnetic material. This tube is clamped against or integral with a flange 13 on a smaller cylindrical core 14 of magnetic material. Within the gap between the members 11, 14 is located an annular coil 19, which is mounted on a former 18 attached to a rod 17. The rod is connected to a stylus-bar 16, mounted as usual, a perforated diaphragm 24 being preferably provided for centering the coil. A steel tube 22 forms a pole piece for the magnet, and also supports an adapter 23 for connection to the usual tone-arm. A disclaimer is inserted to Specification 254,403.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1374525A GB257651A (en) | 1925-05-26 | 1925-05-26 | Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1374525A GB257651A (en) | 1925-05-26 | 1925-05-26 | Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB257651A true GB257651A (en) | 1926-08-26 |
Family
ID=10028604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1374525A Expired GB257651A (en) | 1925-05-26 | 1925-05-26 | Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB257651A (en) |
-
1925
- 1925-05-26 GB GB1374525A patent/GB257651A/en not_active Expired
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