GB448973A - Improvements in or relating to sound reproducing systems - Google Patents
Improvements in or relating to sound reproducing systemsInfo
- Publication number
- GB448973A GB448973A GB24038/35A GB2403835A GB448973A GB 448973 A GB448973 A GB 448973A GB 24038/35 A GB24038/35 A GB 24038/35A GB 2403835 A GB2403835 A GB 2403835A GB 448973 A GB448973 A GB 448973A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformers
- pick
- cut
- coils
- opposing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
- H04R9/16—Gramophone pick-ups using a stylus; Recorders using a stylus signals recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
-
- 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
- H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Stereophonic System (AREA)
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
- Magnetic Heads (AREA)
Abstract
448,973. Reproducing music. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A. Aug. 28, 1935, No. 24038. Convention date, Sept. 5, 1934. [Class 40 (iv)] In a system for reproducing fron a record having two traces, e.g hill and dale anc lateral, cut in the same groove anc using a pick - up such as describec in Specificatior 448,975 having spaced coils each responding to the two traces, arrangements are provided for separating the combined reproductions. The system may be applied to binaural reproduction, or to the reproduction of two un-related recordings or a solo and its accompaniment. As shown, each coil 16, 17 is connected to a pair of parallel valves 27, 28 or 29, 30 which have separate output transformers 31 ... 34, the secondaries of 31, 33 being in aiding and of 32, 34 in opposing relationship. For the hill and dale cut, the stylus moves vertically and the currents in the pick-up coils are in phase so that loud-speaker 36 connected to the aiding transformers 31, 33 reproduces, whereas loudspeaker 38 connected to the opposing transformers 32, 34 does not. For the lateral cut, the pick-up oscillates about a horizontal axis and the currents in the coils are in opposite phase so that loud-speaker 38 connected to the opposing transformers reproduces and 36 does not.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US742761A US2105916A (en) | 1934-09-05 | 1934-09-05 | Sound reproducing system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB448973A true GB448973A (en) | 1936-06-18 |
Family
ID=24986098
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24038/35A Expired GB448973A (en) | 1934-09-05 | 1935-08-28 | Improvements in or relating to sound reproducing systems |
GB24039/35A Expired GB448974A (en) | 1934-09-05 | 1935-08-28 | Improvements in or relating to sound reproducing systems |
GB24118/35A Expired GB448975A (en) | 1934-09-05 | 1935-08-29 | Improvements in or relating to phonograph reproducers |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24039/35A Expired GB448974A (en) | 1934-09-05 | 1935-08-28 | Improvements in or relating to sound reproducing systems |
GB24118/35A Expired GB448975A (en) | 1934-09-05 | 1935-08-29 | Improvements in or relating to phonograph reproducers |
Country Status (4)
Country | Link |
---|---|
US (1) | US2105916A (en) |
DE (1) | DE675787C (en) |
FR (1) | FR794451A (en) |
GB (3) | GB448973A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1031536B (en) * | 1956-03-16 | 1958-06-04 | Teldec Telefunken Decca | Mechanical-electrical converter for the generation or scanning of a grooved sound track |
DE1135675B (en) * | 1958-01-18 | 1962-08-30 | Neumann Georg | Electrodynamic pickup or cutting box for scanning or cutting a groove-shaped sound track |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2700068A (en) * | 1948-11-16 | 1955-01-18 | Muller Egon Nicolas | Pulse multiplex system |
DE1065188B (en) * | 1955-09-23 | |||
US3053943A (en) * | 1957-07-12 | 1962-09-11 | Columbia Broadcasting Syst Inc | Phonograph record cutter |
DE1073762B (en) * | 1957-07-15 | 1960-01-21 | Deutsche Grammophon Gesellschaft mit beschränkter Haftung, Hamburg | Pickup based on the piezoelectric principle for simultaneous scanning of side and subscript writing |
NL231921A (en) * | 1957-10-08 | |||
NL224776A (en) * | 1957-12-10 | |||
DE1138560B (en) * | 1958-03-05 | 1962-10-25 | Fonofilm Ind As | Cutting box for recording two signals in a groove of a sound carrier |
US3013125A (en) * | 1958-05-16 | 1961-12-12 | Columbia Broadcasting Syst Inc | Stereophonic recording |
NL105975C (en) * | 1958-05-27 | |||
DE1102429B (en) * | 1959-01-10 | 1961-03-16 | Karl Braun | Method, circuit arrangement and pickup head for switching off or reducing crosstalk interference |
US3049040A (en) * | 1959-01-26 | 1962-08-14 | Donald J Leslie | Apparatus for minimizing beat effects |
GB950587A (en) * | 1959-06-13 | 1964-02-26 | Emi Ltd | Improvements in or relating to gramophone pick-ups |
US4160268A (en) * | 1977-03-31 | 1979-07-03 | Victor Company Of Japan, Ltd. | Signal pickup device with tracking control and jitter compensation for a video disc |
-
1934
- 1934-09-05 US US742761A patent/US2105916A/en not_active Expired - Lifetime
-
1935
- 1935-08-28 GB GB24038/35A patent/GB448973A/en not_active Expired
- 1935-08-28 GB GB24039/35A patent/GB448974A/en not_active Expired
- 1935-08-29 GB GB24118/35A patent/GB448975A/en not_active Expired
- 1935-08-29 FR FR794451D patent/FR794451A/en not_active Expired
- 1935-08-31 DE DEE47310D patent/DE675787C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1031536B (en) * | 1956-03-16 | 1958-06-04 | Teldec Telefunken Decca | Mechanical-electrical converter for the generation or scanning of a grooved sound track |
DE1135675B (en) * | 1958-01-18 | 1962-08-30 | Neumann Georg | Electrodynamic pickup or cutting box for scanning or cutting a groove-shaped sound track |
Also Published As
Publication number | Publication date |
---|---|
US2105916A (en) | 1938-01-18 |
DE675787C (en) | 1939-05-17 |
GB448974A (en) | 1936-06-18 |
FR794451A (en) | 1936-02-18 |
GB448975A (en) | 1936-06-18 |
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