GB1510870A - Carbon microphone capsules - Google Patents
Carbon microphone capsulesInfo
- Publication number
- GB1510870A GB1510870A GB29598/75A GB2959875A GB1510870A GB 1510870 A GB1510870 A GB 1510870A GB 29598/75 A GB29598/75 A GB 29598/75A GB 2959875 A GB2959875 A GB 2959875A GB 1510870 A GB1510870 A GB 1510870A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbon
- carbon microphone
- microphone capsules
- moisture
- sleeve
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
-
- 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
- H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
1510870 Carbon microphones SIEMENS AG 15 July 1975 [19 Aug 1974(2)] 29598/75 Heading H4J In a carbon microphone of the type disclosed in Specification 957,384 wherein part of the chamber containing the carbon granules is closed by an air permeable pit 10, and a folded sleeve 11 is provided which is impermeable to moisture, the edge of the foil 10 is arranged to be surrounded by moisture impermeable material 11, 12. The material 12 may be formed integrally with the sleeve 11 or may be formed as a separate ring of material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742439688 DE2439688C2 (en) | 1974-08-19 | 1974-08-19 | MOISTURE PROTECTIVE CHARCOAL MICROPHONE CAPSULE |
DE19742439720 DE2439720C2 (en) | 1974-08-19 | 1974-08-19 | MOISTURE PROTECTED CHARCOAL MICROPHONE CAPSULE |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1510870A true GB1510870A (en) | 1978-05-17 |
Family
ID=25767572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29598/75A Expired GB1510870A (en) | 1974-08-19 | 1975-07-15 | Carbon microphone capsules |
Country Status (9)
Country | Link |
---|---|
AR (1) | AR203525A1 (en) |
AT (1) | AT338896B (en) |
BR (1) | BR7505266A (en) |
CH (1) | CH591197A5 (en) |
FI (1) | FI752160A (en) |
FR (1) | FR2282766A1 (en) |
GB (1) | GB1510870A (en) |
IT (1) | IT1040482B (en) |
SE (1) | SE409538B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108574917B (en) * | 2018-05-28 | 2021-03-02 | 歌尔股份有限公司 | Electronic device |
-
1975
- 1975-07-15 GB GB29598/75A patent/GB1510870A/en not_active Expired
- 1975-07-16 AT AT550075A patent/AT338896B/en not_active IP Right Cessation
- 1975-07-24 AR AR259741A patent/AR203525A1/en active
- 1975-07-28 FI FI752160A patent/FI752160A/fi not_active Application Discontinuation
- 1975-08-05 IT IT26110/75A patent/IT1040482B/en active
- 1975-08-14 FR FR7525412A patent/FR2282766A1/en not_active Withdrawn
- 1975-08-14 CH CH1059075A patent/CH591197A5/xx not_active IP Right Cessation
- 1975-08-18 BR BR7505266*D patent/BR7505266A/en unknown
- 1975-08-19 SE SE7509277A patent/SE409538B/en unknown
Also Published As
Publication number | Publication date |
---|---|
SE409538B (en) | 1979-08-20 |
FR2282766A1 (en) | 1976-03-19 |
IT1040482B (en) | 1979-12-20 |
FI752160A (en) | 1976-02-20 |
ATA550075A (en) | 1977-01-15 |
AT338896B (en) | 1977-09-26 |
AR203525A1 (en) | 1975-09-15 |
SE7509277L (en) | 1976-02-20 |
CH591197A5 (en) | 1977-09-15 |
BR7505266A (en) | 1976-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |