GB279390A - Improvements in acoustic apparatus, particularly applicable to telephone transmitters - Google Patents
Improvements in acoustic apparatus, particularly applicable to telephone transmittersInfo
- Publication number
- GB279390A GB279390A GB19382/27A GB1938227A GB279390A GB 279390 A GB279390 A GB 279390A GB 19382/27 A GB19382/27 A GB 19382/27A GB 1938227 A GB1938227 A GB 1938227A GB 279390 A GB279390 A GB 279390A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- grooves
- chamber
- fabric
- passage
- 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
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 239000004744 fabric Substances 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000013016 damping Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 239000007787 solid 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
- H04R19/00—Electrostatic transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US142790A US1722347A (en) | 1926-10-20 | 1926-10-20 | Acoustic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB279390A true GB279390A (en) | 1928-10-22 |
Family
ID=22501288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19382/27A Expired GB279390A (en) | 1926-10-20 | 1927-07-21 | Improvements in acoustic apparatus, particularly applicable to telephone transmitters |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1722347A (enrdf_load_stackoverflow) |
| BE (1) | BE345155A (enrdf_load_stackoverflow) |
| DE (1) | DE519901C (enrdf_load_stackoverflow) |
| FR (1) | FR639320A (enrdf_load_stackoverflow) |
| GB (1) | GB279390A (enrdf_load_stackoverflow) |
| NL (1) | NL22541C (enrdf_load_stackoverflow) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2500643A (en) * | 1946-12-07 | 1950-03-14 | Bell Telephone Labor Inc | Condenser transducer independent of ambient atmospheric conditions |
| JPS5121791B2 (enrdf_load_stackoverflow) * | 1972-08-04 | 1976-07-05 |
-
0
- NL NL22541D patent/NL22541C/xx active
- BE BE345155D patent/BE345155A/xx unknown
-
1926
- 1926-10-20 US US142790A patent/US1722347A/en not_active Expired - Lifetime
-
1927
- 1927-07-21 GB GB19382/27A patent/GB279390A/en not_active Expired
- 1927-07-30 DE DEE36023D patent/DE519901C/de not_active Expired
- 1927-08-11 FR FR639320D patent/FR639320A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR639320A (fr) | 1928-06-19 |
| US1722347A (en) | 1929-07-30 |
| DE519901C (de) | 1931-03-06 |
| BE345155A (enrdf_load_stackoverflow) | |
| NL22541C (enrdf_load_stackoverflow) |
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