GB322514A - Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves - Google Patents
Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound wavesInfo
- Publication number
- GB322514A GB322514A GB2548028A GB2548028A GB322514A GB 322514 A GB322514 A GB 322514A GB 2548028 A GB2548028 A GB 2548028A GB 2548028 A GB2548028 A GB 2548028A GB 322514 A GB322514 A GB 322514A
- Authority
- GB
- United Kingdom
- Prior art keywords
- megaphones
- gramophones
- recording
- transmitting
- sound waves
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Abstract
322,514. Borgqvist, A. H. Sept. 5, 1928. Tone-arms. - A tonearm b has a number of spirals or convolutions s and a flared extension c which is surrounded by the throat section d of the horn. The section containing the convolutions may be removable so that it can be replaced by a section having a greater or smaller number of convolutions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2548028A GB322514A (en) | 1928-09-05 | 1928-09-05 | Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2548028A GB322514A (en) | 1928-09-05 | 1928-09-05 | Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB322514A true GB322514A (en) | 1929-12-05 |
Family
ID=10228380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2548028A Expired GB322514A (en) | 1928-09-05 | 1928-09-05 | Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB322514A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2325603A (en) * | 1997-05-24 | 1998-11-25 | Celestion Int Ltd | Acoustic horns for loudspeakers incorporate vibration damping material |
GB2329788A (en) * | 1997-09-26 | 1999-03-31 | Daewoo Electronics Co Ltd | Television speaker with vibration plate for reducing vibration of the casing |
-
1928
- 1928-09-05 GB GB2548028A patent/GB322514A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2325603A (en) * | 1997-05-24 | 1998-11-25 | Celestion Int Ltd | Acoustic horns for loudspeakers incorporate vibration damping material |
US6116373A (en) * | 1997-05-24 | 2000-09-12 | Kh Technology Corporation | Acoustic horns for loudspeakers |
GB2325603B (en) * | 1997-05-24 | 2001-08-22 | Celestion Internat Ltd | Acoustic horns for loudspeakers |
GB2329788A (en) * | 1997-09-26 | 1999-03-31 | Daewoo Electronics Co Ltd | Television speaker with vibration plate for reducing vibration of the casing |
US6205229B1 (en) | 1997-09-26 | 2001-03-20 | Daewoo Electronics Co., Ltd. | Television having a device for preventing vibration of speaker |
GB2329788B (en) * | 1997-09-26 | 2001-10-24 | Daewoo Electronics Co Ltd | Television having a device for preventing vibration of speaker |
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