NL17820C - - Google Patents
Info
- Publication number
- NL17820C NL17820C NL17820DA NL17820C NL 17820 C NL17820 C NL 17820C NL 17820D A NL17820D A NL 17820DA NL 17820 C NL17820 C NL 17820C
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
- H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL260230X | 1925-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL17820C true NL17820C (enrdf_load_stackoverflow) |
Family
ID=19781471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL17820D NL17820C (enrdf_load_stackoverflow) | 1925-10-21 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1859758A (enrdf_load_stackoverflow) |
| BE (1) | BE335671A (enrdf_load_stackoverflow) |
| FR (1) | FR619732A (enrdf_load_stackoverflow) |
| GB (1) | GB260230A (enrdf_load_stackoverflow) |
| NL (1) | NL17820C (enrdf_load_stackoverflow) |
-
0
- NL NL17820D patent/NL17820C/xx active
- BE BE335671D patent/BE335671A/xx unknown
-
1926
- 1926-07-31 FR FR619732D patent/FR619732A/fr not_active Expired
- 1926-10-02 GB GB24406/26A patent/GB260230A/en not_active Expired
- 1926-10-20 US US142847A patent/US1859758A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR619732A (fr) | 1927-04-07 |
| BE335671A (enrdf_load_stackoverflow) | |
| US1859758A (en) | 1932-05-24 |
| GB260230A (en) | 1927-04-28 |