NL90444C - - Google Patents
Info
- Publication number
- NL90444C NL90444C NL90444DA NL90444C NL 90444 C NL90444 C NL 90444C NL 90444D A NL90444D A NL 90444DA NL 90444 C NL90444 C NL 90444C
- 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
- H04R11/06—Telephone receivers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK22910A DE1052458B (en) | 1954-07-21 | 1954-07-21 | For installation in a earpiece for telephones specific electromagnetic four-pole system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL90444C true NL90444C (en) |
Family
ID=7216583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL90444D NL90444C (en) | 1954-07-21 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1052458B (en) |
| NL (1) | NL90444C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3076062A (en) * | 1959-10-30 | 1963-01-29 | Dyna Magnetic Devices Inc | Hearing-aid sound transducer |
| US3005880A (en) * | 1960-05-06 | 1961-10-24 | Elvin D Simshauser | Non-linear transducer armature |
| NL282929A (en) * | 1961-09-06 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH148183A (en) * | 1929-11-25 | 1931-07-15 | Ideal Werke Ag | Middle leaf springs of elastically clamped armature on ferromagnetic loudspeaker drive systems. |
| US2163161A (en) * | 1937-05-20 | 1939-06-20 | Control Instr Co Inc | Magnetic unit |
| GB529107A (en) * | 1938-05-12 | 1940-11-14 | Telefunken Gmbh | Improvements in or relating to magnets |
| CH218774A (en) * | 1939-09-05 | 1941-12-31 | Fides Gmbh | Magnetic microphone. |
| CH261156A (en) * | 1947-02-20 | 1949-04-30 | Siemens Ag Albis | Electroacoustic converter. |
| GB643518A (en) * | 1947-08-19 | 1950-09-20 | Wheeler Insulated Wire Company | Improvements in or relating to transducers |
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0
- NL NL90444D patent/NL90444C/xx active
-
1954
- 1954-07-21 DE DEK22910A patent/DE1052458B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1052458B (en) | 1959-03-12 |