GB289176A - Improvements in or relating to sound-boxes for use on gramophones - Google Patents
Improvements in or relating to sound-boxes for use on gramophonesInfo
- Publication number
- GB289176A GB289176A GB238127A GB238127A GB289176A GB 289176 A GB289176 A GB 289176A GB 238127 A GB238127 A GB 238127A GB 238127 A GB238127 A GB 238127A GB 289176 A GB289176 A GB 289176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- gramophones
- boxes
- relating
- box
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Abstract
289,176. Hibbard, C. G. Oct. 21, 1927. Diaphragms. - The diaphragm of a gramophone sound-box is formed with a central zone convex outwardly passing into a concentric zone a' concave outwardly then into a concentric zone convex outwardly which joins at a square corner with a flat annular portion a, and the apertured backplate of the sound-box is countersunk at d.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB238127A GB289176A (en) | 1927-10-21 | 1927-10-21 | Improvements in or relating to sound-boxes for use on gramophones |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB238127A GB289176A (en) | 1927-10-21 | 1927-10-21 | Improvements in or relating to sound-boxes for use on gramophones |
Publications (1)
Publication Number | Publication Date |
---|---|
GB289176A true GB289176A (en) | 1928-04-26 |
Family
ID=9738540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB238127A Expired GB289176A (en) | 1927-10-21 | 1927-10-21 | Improvements in or relating to sound-boxes for use on gramophones |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB289176A (en) |
-
1927
- 1927-10-21 GB GB238127A patent/GB289176A/en not_active Expired
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