FR1086551A - - Google Patents
Info
- Publication number
- FR1086551A FR1086551A FR1086551DA FR1086551A FR 1086551 A FR1086551 A FR 1086551A FR 1086551D A FR1086551D A FR 1086551DA FR 1086551 A FR1086551 A FR 1086551A
- Authority
- FR
- France
- 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
- H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus
-
- 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
- H04R21/028—Microphones with a fluid as resistance material
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB21510/53A GB747023A (en) | 1953-08-04 | 1953-08-04 | Improvements in or relating to electro-acoustic transducers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1086551A true FR1086551A (en) | 1955-02-14 |
Family
ID=10164148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1086551D Expired FR1086551A (en) | 1953-08-04 | 1953-08-06 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2648726A (en) |
| FR (1) | FR1086551A (en) |
| GB (1) | GB747023A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2703822A (en) * | 1952-04-29 | 1955-03-08 | Harry C Warner | Phonograph pickup and the like |
| US2769038A (en) * | 1952-11-29 | 1956-10-30 | Orton Melvern | Phonograph pickup and the like |
| US2786898A (en) * | 1953-01-19 | 1957-03-26 | Henry J Schultz | Electric control device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB135157A (en) * | ||||
| US203018A (en) * | 1878-04-30 | Improvement in telephones or speaking-telegraphs | ||
| GB134865A (en) * | 1921-01-11 | |||
| FR661954A (en) * | 1928-08-25 | 1929-08-01 | Ejectrocapillary device functioning as microphone, telephone and detector | |
| US1972578A (en) * | 1931-08-14 | 1934-09-04 | Wallichs Adolf | Measuring instrument |
| GB385702A (en) * | 1931-11-04 | 1933-01-05 | Archibald Montgomery Low | Improvements in sound reproducing mechanism |
| US2279815A (en) * | 1940-11-14 | 1942-04-14 | Oak Mfg Co | Potentiometer |
| US2373676A (en) * | 1941-07-30 | 1945-04-17 | Kenneth J Germeshausen | Reproducer |
| US2357026A (en) * | 1943-10-30 | 1944-08-29 | Scherbatskoy Serge Alexander | Phonograph |
| US2403696A (en) * | 1944-08-14 | 1946-07-09 | Harry C Warner | Electrical sound reproducing apparatus |
| BE475067A (en) * | 1944-11-28 | |||
| US2407363A (en) * | 1945-02-17 | 1946-09-10 | Oliver W Storey | Electrical apparatus |
-
1949
- 1949-09-02 US US113753A patent/US2648726A/en not_active Expired - Lifetime
-
1953
- 1953-08-04 GB GB21510/53A patent/GB747023A/en not_active Expired
- 1953-08-06 FR FR1086551D patent/FR1086551A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2648726A (en) | 1953-08-11 |
| GB747023A (en) | 1956-03-28 |