NL40839C - - Google Patents
Info
- Publication number
- NL40839C NL40839C NL40839DA NL40839C NL 40839 C NL40839 C NL 40839C NL 40839D A NL40839D A NL 40839DA NL 40839 C NL40839 C NL 40839C
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—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
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/045—Mounting
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US661237A US2007747A (en) | 1933-03-17 | 1933-03-17 | Acoustic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL40839C true NL40839C (US06252093-20010626-C00008.png) |
Family
ID=24652747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL40839D NL40839C (US06252093-20010626-C00008.png) | 1933-03-17 |
Country Status (9)
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE945568C (de) * | 1937-04-30 | 1956-07-12 | Telefunken Gmbh | Lautsprecher mit zwei aus Werkstoffen verschiedener Steifigkeit und Leichtigkeit hergestellten kegelfoermigen Membranen |
| US2489862A (en) * | 1943-01-07 | 1949-11-29 | Gen Electric | Damping for dynamic loudspeakers |
| US2443177A (en) * | 1944-02-28 | 1948-06-15 | Submarine Signal Co | Submarine signaling apparatus |
| US2565069A (en) * | 1946-03-30 | 1951-08-21 | Rola Company Inc | Loud-speaker of the double diaphragm type |
| US2534040A (en) * | 1947-04-21 | 1950-12-12 | Radio Television Inst Inc | Multiple section diaphragm loud-speaker |
| US2645684A (en) * | 1948-06-30 | 1953-07-14 | Rca Corp | Noise discriminating system |
| GB667170A (en) * | 1948-10-29 | 1952-02-27 | Paul Gustavus Adolphus Helmuth | Improvements in moving coil loudspeakers |
| US2638510A (en) * | 1949-01-06 | 1953-05-12 | Caesar David Zeitouni | Duplex loud-speaker |
| US2641329A (en) * | 1950-05-29 | 1953-06-09 | Univ Loudspeakers Inc | Loud-speaker diaphragm with transversely arched stiffener means |
| BE519367A (US06252093-20010626-C00008.png) * | 1951-12-07 | |||
| DE1016754B (de) * | 1953-12-07 | 1957-10-03 | Carl Ernst Eichhorn | Spulenkombination fuer magnetische und dynamische Schwingsysteme, z.B. Lautsprecher, Mikrophone, Tonabnehmer sowie fuer die Primaerseite von Ausgangsuebertragern |
| US2832828A (en) * | 1955-09-26 | 1958-04-29 | Arthur Blumenfeld | Loudspeaker circuitry |
| US3350513A (en) * | 1964-06-22 | 1967-10-31 | Alfred H Roberts | Cone loudspeakers |
| US3814857A (en) * | 1969-11-04 | 1974-06-04 | N Thomasen | Two-way loudspeaker system with two tandem-connected high-range speakers |
| US4383134A (en) * | 1980-03-10 | 1983-05-10 | Electro Audio Dynamics, Inc. | Loudspeaker systems |
| JPS6175696U (US06252093-20010626-C00008.png) * | 1984-10-23 | 1986-05-21 | ||
| DE3603537A1 (de) * | 1986-02-05 | 1987-08-06 | Pfleid Wohnraumakustik Gmbh | Breitbandlautsprecher |
| US5103482A (en) * | 1988-07-28 | 1992-04-07 | Fabri Conti Lucas | Apparatus and method for reproducing high fidelity sound |
| US10277984B2 (en) * | 2016-06-21 | 2019-04-30 | Dongguan Li Yin Technology Limited | Multi-strand independent input-output voice coil |
-
0
- NL NL40839D patent/NL40839C/xx active
- BE BE402059D patent/BE402059A/xx unknown
-
1933
- 1933-03-17 US US661237A patent/US2007747A/en not_active Expired - Lifetime
-
1934
- 1934-03-13 FR FR770109D patent/FR770109A/fr not_active Expired
- 1934-03-15 CH CH179149D patent/CH179149A/de unknown
- 1934-03-16 DK DK50698D patent/DK50698C/da active
- 1934-03-17 AT AT143569D patent/AT143569B/de active
- 1934-03-17 DE DER90177D patent/DE680788C/de not_active Expired
- 1934-03-19 GB GB8631/34A patent/GB439561A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DK50698C (da) | 1935-09-30 |
| US2007747A (en) | 1935-07-09 |
| CH179149A (de) | 1935-08-31 |
| DE680788C (de) | 1939-09-08 |
| BE402059A (US06252093-20010626-C00008.png) | |
| GB439561A (en) | 1935-12-10 |
| FR770109A (fr) | 1934-09-08 |
| AT143569B (de) | 1935-11-25 |
