NL17195C - - Google Patents
Info
- Publication number
- NL17195C NL17195C NL17195DA NL17195C NL 17195 C NL17195 C NL 17195C NL 17195D A NL17195D A NL 17195DA NL 17195 C NL17195 C NL 17195C
- 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
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
- H04R13/02—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)
- Soft Magnetic Materials (AREA)
- Hard Magnetic Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17546/25A GB248245A (en) | 1925-07-08 | 1925-07-08 | Improvements in telephone receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL17195C true NL17195C (en:Method) |
Family
ID=10097071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL17195D NL17195C (en:Method) | 1925-07-08 |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US1642777A (en:Method) |
| FR (1) | FR604660A (en:Method) |
| GB (1) | GB248245A (en:Method) |
| NL (1) | NL17195C (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4443667A (en) * | 1982-01-11 | 1984-04-17 | Bell Telephone Laboratories, Incorporated | Electromagnetic transducer |
| USD539790S1 (en) * | 2006-03-02 | 2007-04-03 | Cheng Uei Precision Industry Co., Ltd. | Microphone can shell |
-
0
- NL NL17195D patent/NL17195C/xx active
-
1924
- 1924-10-30 US US746791A patent/US1642777A/en not_active Expired - Lifetime
- 1924-11-04 US US747718A patent/US1642778A/en not_active Expired - Lifetime
-
1925
- 1925-07-08 GB GB17546/25A patent/GB248245A/en not_active Expired
- 1925-09-17 FR FR604660D patent/FR604660A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1642778A (en) | 1927-09-20 |
| FR604660A (fr) | 1926-05-11 |
| US1642777A (en) | 1927-09-20 |
| GB248245A (en) | 1926-03-04 |