FR660977A - mechanically operated sound transmitter - Google Patents
mechanically operated sound transmitterInfo
- Publication number
- FR660977A FR660977A FR660977DA FR660977A FR 660977 A FR660977 A FR 660977A FR 660977D A FR660977D A FR 660977DA FR 660977 A FR660977 A FR 660977A
- Authority
- FR
- France
- Prior art keywords
- mechanically operated
- sound transmitter
- operated sound
- transmitter
- mechanically
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR660977T | 1928-01-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR660977A true FR660977A (en) | 1929-07-19 |
Family
ID=9010599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR660977D Expired FR660977A (en) | 1928-01-13 | 1928-01-13 | mechanically operated sound transmitter |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR660977A (en) |
-
1928
- 1928-01-13 FR FR660977D patent/FR660977A/en not_active Expired
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