GB654071A - Improvements in sound recording and/or reproducing devices - Google Patents
Improvements in sound recording and/or reproducing devicesInfo
- Publication number
- GB654071A GB654071A GB2435847A GB2435847A GB654071A GB 654071 A GB654071 A GB 654071A GB 2435847 A GB2435847 A GB 2435847A GB 2435847 A GB2435847 A GB 2435847A GB 654071 A GB654071 A GB 654071A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- sound
- armature
- reproducing devices
- sound recording
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/16—Mounting or connecting stylus to transducer with or without damping means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
654,071. Sound reproducing devices. ROE, D. O., and BIRMINGHAM SOUND REPRODUCERS, Ltd. Sept. 3, 1947, No. 24358. [Class 40 (iv)] In a sound recording or reproducing device the mode of vibration of the vibrating elements is influenced by two members of different stiffness (in a ratio of from 3: 1 to 10: 1), and damping applied through the member of greater stiffness, so that a substantially flat output characteristic is obtained without the loss of sensitivity inherent in instruments designed to be resonant outside the audio range. In the electromagnetic pick-up, Fig. 2, an armature 31 is torsionally mounted on shafts 32 and 33, the former of which has a square end 34 sweated into a spacing-piece 29, whilst the latter is centred by a pivot 40 and frictionally restrained by pressure on a lanolin-impregnated felt pad 36 through a plate 35. In a further embodiment, Fig. 7, the end of the shaft 33 is fixed to a member 37 and the plate 35 presses the felt damping pad 36 against a plate 351 attached to the armature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2435847A GB654071A (en) | 1947-09-03 | 1947-09-03 | Improvements in sound recording and/or reproducing devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2435847A GB654071A (en) | 1947-09-03 | 1947-09-03 | Improvements in sound recording and/or reproducing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB654071A true GB654071A (en) | 1951-06-06 |
Family
ID=10210465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2435847A Expired GB654071A (en) | 1947-09-03 | 1947-09-03 | Improvements in sound recording and/or reproducing devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB654071A (en) |
-
1947
- 1947-09-03 GB GB2435847A patent/GB654071A/en not_active Expired
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