FR1019736A - Telephone transmitter - Google Patents
Telephone transmitterInfo
- Publication number
- FR1019736A FR1019736A FR1019736DA FR1019736A FR 1019736 A FR1019736 A FR 1019736A FR 1019736D A FR1019736D A FR 1019736DA FR 1019736 A FR1019736 A FR 1019736A
- Authority
- FR
- France
- Prior art keywords
- telephone transmitter
- telephone
- transmitter
- 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
- H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV2863A DE844307C (en) | 1950-11-19 | 1950-11-19 | Coal core microphone |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1019736A true FR1019736A (en) | 1953-01-26 |
Family
ID=7570197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1019736D Expired FR1019736A (en) | 1950-11-19 | 1950-05-31 | Telephone transmitter |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH287033A (en) |
DE (1) | DE844307C (en) |
FR (1) | FR1019736A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1003264B (en) * | 1954-07-08 | 1957-02-28 | Annemarie Sell Geb Patrzek | Carbon core microphone |
-
1950
- 1950-05-31 FR FR1019736D patent/FR1019736A/en not_active Expired
- 1950-06-16 CH CH287033D patent/CH287033A/en unknown
- 1950-11-19 DE DEV2863A patent/DE844307C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE844307C (en) | 1952-07-17 |
CH287033A (en) | 1952-11-15 |
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