NL71197C - - Google Patents
Info
- Publication number
- NL71197C NL71197C NL71197DA NL71197C NL 71197 C NL71197 C NL 71197C NL 71197D A NL71197D A NL 71197DA NL 71197 C NL71197 C NL 71197C
- Authority
- NL
- Netherlands
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US755397A US2506624A (en) | 1947-06-18 | 1947-06-18 | Electroacoustic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL71197C true NL71197C (US07534539-20090519-C00280.png) |
Family
ID=25038963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL71197D NL71197C (US07534539-20090519-C00280.png) | 1947-06-18 |
Country Status (6)
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2535757A (en) * | 1946-06-25 | 1950-12-26 | John J Root | Peripherally driven electroacoustical transducer |
| US2567365A (en) * | 1948-08-04 | 1951-09-11 | Bell Telephone Labor Inc | Polarized operator for telephone receivers |
| US2717096A (en) * | 1953-01-23 | 1955-09-06 | Minnis W Henderson | Magnet gas tank cap |
| US4075437A (en) * | 1976-07-16 | 1978-02-21 | Bell Telephone Laboratories, Incorporated | Composition, processing and devices including magnetic alloy |
| US4174983A (en) * | 1978-07-13 | 1979-11-20 | Bell Telephone Laboratories, Incorporated | Fe-Cr-Co magnetic alloy processing |
| US4258234A (en) * | 1979-08-24 | 1981-03-24 | Bell Telephone Laboratories, Incorporated | Electroacoustic device |
| US4311537A (en) * | 1980-04-22 | 1982-01-19 | Bell Telephone Laboratories, Incorporated | Low-cobalt Fe-Cr-Co permanent magnet alloy processing |
| US4443667A (en) * | 1982-01-11 | 1984-04-17 | Bell Telephone Laboratories, Incorporated | Electromagnetic transducer |
| NL8602719A (nl) * | 1986-10-29 | 1988-05-16 | Philips Nv | Trillingsmotor. |
| DE3819771A1 (de) * | 1987-12-18 | 1989-07-06 | Karl Scheffer Klute Gmbh & Co | Handluftpumpe fuer zweiradreifen |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1228639A (en) * | 1914-03-27 | 1917-06-05 | Erik Christian Bayer | Sound-producing device. |
| US1579605A (en) * | 1925-10-17 | 1926-04-06 | Gavin Percy | Radio amplifying receiver |
| US1895071A (en) * | 1928-09-25 | 1933-01-24 | Herman J Fanger | Dynamic loud speaker unit |
| BE386404A (US07534539-20090519-C00280.png) * | 1931-02-12 | |||
| US2170571A (en) * | 1936-08-12 | 1939-08-22 | Bell Telephone Labor Inc | Acoustic device |
| US2249160A (en) * | 1939-05-19 | 1941-07-15 | Bell Telephone Labor Inc | Acoustic device |
| US2395166A (en) * | 1942-12-24 | 1946-02-19 | Astatic Corp | Transducer |
-
0
- BE BE481098D patent/BE481098A/xx unknown
- FR FR963471D patent/FR963471A/fr not_active Expired
- NL NL71197D patent/NL71197C/xx active
-
1947
- 1947-06-18 US US755397A patent/US2506624A/en not_active Expired - Lifetime
-
1948
- 1948-06-17 GB GB16314/48A patent/GB653923A/en not_active Expired
- 1948-12-31 DE DEP28875D patent/DE813164C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR963471A (US07534539-20090519-C00280.png) | 1950-07-11 |
| DE813164C (de) | 1951-09-10 |
| US2506624A (en) | 1950-05-09 |
| BE481098A (US07534539-20090519-C00280.png) | |
| GB653923A (en) | 1951-05-30 |
