FR2287822A1 - Transducteur acoustique a amplificateur electromecanique avec source d'energie integree - Google Patents
Transducteur acoustique a amplificateur electromecanique avec source d'energie integreeInfo
- Publication number
- FR2287822A1 FR2287822A1 FR7523477A FR7523477A FR2287822A1 FR 2287822 A1 FR2287822 A1 FR 2287822A1 FR 7523477 A FR7523477 A FR 7523477A FR 7523477 A FR7523477 A FR 7523477A FR 2287822 A1 FR2287822 A1 FR 2287822A1
- Authority
- FR
- France
- Prior art keywords
- energy source
- acoustic transducer
- integrated energy
- electromechanical amplifier
- electromechanical
- 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.)
- Granted
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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F13/00—Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US512190A US3909558A (en) | 1974-10-07 | 1974-10-07 | Electromechanical amplifier sound transducer with combined power source |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2287822A1 true FR2287822A1 (fr) | 1976-05-07 |
FR2287822B1 FR2287822B1 (fr) | 1979-05-11 |
Family
ID=24038069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7523477A Granted FR2287822A1 (fr) | 1974-10-07 | 1975-07-28 | Transducteur acoustique a amplificateur electromecanique avec source d'energie integree |
Country Status (5)
Country | Link |
---|---|
US (1) | US3909558A (fr) |
JP (1) | JPS5147416A (fr) |
DE (1) | DE2533890A1 (fr) |
FR (1) | FR2287822A1 (fr) |
IT (1) | IT1051133B (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3968332A (en) * | 1975-06-05 | 1976-07-06 | Lawrence Peska Associates, Inc. | Toy carbon microphone |
USD246369S (en) * | 1975-10-08 | 1977-11-15 | O'brien Deceased Gerard J | Tap transducer intercom |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE44937C (de) * | V. M. BERTHOLD in Cambridgeport, Massach.,V. St. A | Neuerung an Batterie-Telephonen |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US298286A (en) * | 1884-05-06 | Telephonic transmitter | ||
US3136854A (en) * | 1962-04-16 | 1964-06-09 | Clark A Willick | Underwater telephone |
-
1974
- 1974-10-07 US US512190A patent/US3909558A/en not_active Expired - Lifetime
-
1975
- 1975-07-14 JP JP50086101A patent/JPS5147416A/ja active Pending
- 1975-07-28 FR FR7523477A patent/FR2287822A1/fr active Granted
- 1975-07-29 DE DE19752533890 patent/DE2533890A1/de active Pending
- 1975-10-07 IT IT83658/75A patent/IT1051133B/it active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE44937C (de) * | V. M. BERTHOLD in Cambridgeport, Massach.,V. St. A | Neuerung an Batterie-Telephonen |
Also Published As
Publication number | Publication date |
---|---|
DE2533890A1 (de) | 1976-04-08 |
FR2287822B1 (fr) | 1979-05-11 |
JPS5147416A (fr) | 1976-04-23 |
US3909558A (en) | 1975-09-30 |
IT1051133B (it) | 1981-04-21 |
AU8256175A (en) | 1977-01-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |