NL111179C - - Google Patents
Info
- Publication number
- NL111179C NL111179C NL111179DA NL111179C NL 111179 C NL111179 C NL 111179C NL 111179D A NL111179D A NL 111179DA NL 111179 C NL111179 C NL 111179C
- 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
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US680163A US2993556A (en) | 1957-08-26 | 1957-08-26 | Simulated stereophonic loud-speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL111179C true NL111179C (pm) |
Family
ID=24729947
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL230791D NL230791A (pm) | 1957-08-26 | ||
| NL111179D NL111179C (pm) | 1957-08-26 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL230791D NL230791A (pm) | 1957-08-26 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2993556A (pm) |
| DE (1) | DE1100699B (pm) |
| GB (1) | GB842234A (pm) |
| NL (2) | NL111179C (pm) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379276A (en) * | 1966-12-02 | 1968-04-23 | Adam D. Goettl | Speaker installation means |
| US4083426A (en) * | 1974-10-17 | 1978-04-11 | Peugh H Mark | Loud speaker apparatus |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1984550A (en) * | 1928-08-29 | 1934-12-18 | Western Electric Co | Loud speaker |
| US1930577A (en) * | 1931-09-15 | 1933-10-17 | Magnavox Co | Loud speaker mounting |
| GB447749A (en) * | 1934-10-17 | 1936-05-18 | Paul Gustavus Adolphus Helmuth | Improvements in means for converting electrical energy into sound |
| FR842376A (fr) * | 1938-02-11 | 1939-06-12 | Cie Radio Cinema | Disposition combinée de haut-parleurs pour salles de cinéma sonore et analogues |
| US2602860A (en) * | 1947-11-18 | 1952-07-08 | Doubt Leon Stewart | Loud-speaker structure |
| AT165502B (de) * | 1948-09-25 | 1950-03-10 | Henry Radio Heinrich & Co | Lautsprecherkombination |
| DE915460C (de) * | 1948-10-03 | 1954-07-22 | Alexander Schaaf | Lautsprecherkombination mit gleichmaessigem Schallfeld |
| US2824617A (en) * | 1952-09-15 | 1958-02-25 | Philips Corp | Sound reproducing device |
| US2915588A (en) * | 1956-08-06 | 1959-12-01 | Amar G Bose | Pressure wave generation |
-
0
- NL NL230791D patent/NL230791A/xx unknown
- NL NL111179D patent/NL111179C/xx active
-
1957
- 1957-08-26 US US680163A patent/US2993556A/en not_active Expired - Lifetime
-
1958
- 1958-08-05 GB GB25056/58A patent/GB842234A/en not_active Expired
- 1958-08-23 DE DEW23963A patent/DE1100699B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1100699B (de) | 1961-03-02 |
| US2993556A (en) | 1961-07-25 |
| NL230791A (pm) | |
| GB842234A (en) | 1960-07-20 |