GB347852A - Improvements in or relating to diaphragms for gramophone sound-boxes - Google Patents
Improvements in or relating to diaphragms for gramophone sound-boxesInfo
- Publication number
- GB347852A GB347852A GB1115730A GB1115730A GB347852A GB 347852 A GB347852 A GB 347852A GB 1115730 A GB1115730 A GB 1115730A GB 1115730 A GB1115730 A GB 1115730A GB 347852 A GB347852 A GB 347852A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragms
- boxes
- class
- forming
- positions adjacent
- 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
Abstract
347,852. Diaphragms. LIMIT ENGINEERING CO., Ltd., and COLLINS, A. L., 17, Albion Street, King's Cross, London. April 8, 1930, No. 11157. [Class 40 (iv).] Relates to aluminium or other thin sheet metal diaphragms for gramophone sound-boxes of the kind in which the central portion 1 of the diaphragm is rendered substantially rigid by forming it with concentric corrugations 2 and by securing thereto a similarly formed reinforcing disc 5 and consists in forming the relatively flexible outer portion 3 with spaced ribs or grooves 4 which extend radially or otherwise outwardly from positions adjacent the inner edge of the flexible portion to positions adjacent the outer edge thereof, each rib or groove being formed with oppositely directed concentric or tangential continuations 4a, 4b at the respective inner and outer ends. The point of attachment 6 of the stylus bar may be eccentrically arranged as described in Specification 311,025, [Class 40 (iv), Telephones &c.].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1115730A GB347852A (en) | 1930-04-08 | 1930-04-08 | Improvements in or relating to diaphragms for gramophone sound-boxes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1115730A GB347852A (en) | 1930-04-08 | 1930-04-08 | Improvements in or relating to diaphragms for gramophone sound-boxes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB347852A true GB347852A (en) | 1931-05-07 |
Family
ID=9981061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1115730A Expired GB347852A (en) | 1930-04-08 | 1930-04-08 | Improvements in or relating to diaphragms for gramophone sound-boxes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB347852A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2348336A (en) * | 1999-03-24 | 2000-09-27 | Edwin William Form | A suspension for diaphragm actuators |
-
1930
- 1930-04-08 GB GB1115730A patent/GB347852A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2348336A (en) * | 1999-03-24 | 2000-09-27 | Edwin William Form | A suspension for diaphragm actuators |
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