GB644426A - Improvements in or relating to sound recording and reproducing systems - Google Patents
Improvements in or relating to sound recording and reproducing systemsInfo
- Publication number
- GB644426A GB644426A GB2323747A GB2323747A GB644426A GB 644426 A GB644426 A GB 644426A GB 2323747 A GB2323747 A GB 2323747A GB 2323747 A GB2323747 A GB 2323747A GB 644426 A GB644426 A GB 644426A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- record
- dielectric
- permittivity
- sound
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
- G11B9/02—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using ferroelectric record carriers; Record carriers therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/08—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by electric charge or by variation of electric resistance or capacitance
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
644,426. Electric sound recording. BOSWELL, I. I., PLANER, G. V., and PLANER, F. E. Aug. 21, 1947, No. 23237. [Class 40 (ii)] In a sound recording or reproducing apparatus, the permittivity of successive areas of a dielectric carrier body are permanently changed by external influences in accordance with the sound to be recorded. As shown, in the recorder, Fig. 1, the electric field between electrodes 24, 15 which corresponds with the sound received by microphone 20, causes variations in the permittivity of the dielectric strip record body 10, which is moved between 14, 15 by the driven rollers 11, 12. In the reproducer, Fig. 2, the record 10 is moved between the electrodes 14, 25, in series with the source of constant voltage 26 and resistor 27. The voltage developed at the latter energizes the louclspeaker 29. In further embodiments, not shown, the devices shown in Figs. 1, 2 may be used together as a record copier and in a further embodiment, not shown, the change in permittivity along the strip is used to vary the frequency of the oscillator, the output of which is applied to a frequency discriminator. The record body may be in the form of a strip or disc of thermoplastic resinous material which supports particles of a ceramic dielectric, or alternatively the metal strip or disc may carry a varnish coating which incorporates the dielectric particles. Specification 644,432 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2323747A GB644426A (en) | 1947-08-21 | 1947-08-21 | Improvements in or relating to sound recording and reproducing systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2323747A GB644426A (en) | 1947-08-21 | 1947-08-21 | Improvements in or relating to sound recording and reproducing systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB644426A true GB644426A (en) | 1950-10-11 |
Family
ID=10192383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2323747A Expired GB644426A (en) | 1947-08-21 | 1947-08-21 | Improvements in or relating to sound recording and reproducing systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB644426A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1090259B (en) * | 1954-12-31 | 1960-10-06 | Western Electric Co | Method for ferroelectric recording and reproduction of broadband signals |
DE1231760B (en) * | 1957-05-16 | 1967-01-05 | E H Karl Kuepfmueller Dr Ing | Method for reproducing signals stored on a moving ferroelectric carrier |
DE1285002B (en) * | 1953-10-24 | 1968-12-12 | Philips Patentverwaltung | Device for magnetic recording of signals |
DE1293591B (en) * | 1954-07-15 | 1969-04-24 | Burroughs Corp | Device for recording information in the form of symbols on a moving recording medium |
FR2591014A1 (en) * | 1985-11-29 | 1987-06-05 | Thomson Csf | Information recording/reading device, its method of recording; reading and system of recording; reading implementing this device and this method |
WO2003023423A2 (en) * | 2001-09-10 | 2003-03-20 | Pioneer Corporation | Dielectric constant measuring apparatus and dielectric constant measuring method |
US7221639B2 (en) | 2002-07-09 | 2007-05-22 | Pioneer Corporation | Pickup device |
US7336590B2 (en) | 2002-09-11 | 2008-02-26 | Yasuo Cho | Dielectric reproducing apparatus, dielectric recording apparatus, and dielectric recording/reproducing apparatus |
US7385901B2 (en) | 2003-06-12 | 2008-06-10 | Yasuo Cho | Data recording/reproducing apparatus and method using needle-shaped member |
US7590040B2 (en) | 2003-08-25 | 2009-09-15 | Yasuo Cho | Signal detecting method and apparatus and information reproducing apparatus and method |
-
1947
- 1947-08-21 GB GB2323747A patent/GB644426A/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1285002B (en) * | 1953-10-24 | 1968-12-12 | Philips Patentverwaltung | Device for magnetic recording of signals |
DE1293591B (en) * | 1954-07-15 | 1969-04-24 | Burroughs Corp | Device for recording information in the form of symbols on a moving recording medium |
DE1090259B (en) * | 1954-12-31 | 1960-10-06 | Western Electric Co | Method for ferroelectric recording and reproduction of broadband signals |
DE1231760B (en) * | 1957-05-16 | 1967-01-05 | E H Karl Kuepfmueller Dr Ing | Method for reproducing signals stored on a moving ferroelectric carrier |
FR2591014A1 (en) * | 1985-11-29 | 1987-06-05 | Thomson Csf | Information recording/reading device, its method of recording; reading and system of recording; reading implementing this device and this method |
WO2003023423A3 (en) * | 2001-09-10 | 2004-04-15 | Pioneer Corp | Dielectric constant measuring apparatus and dielectric constant measuring method |
WO2003023423A2 (en) * | 2001-09-10 | 2003-03-20 | Pioneer Corporation | Dielectric constant measuring apparatus and dielectric constant measuring method |
US7218600B2 (en) | 2001-09-10 | 2007-05-15 | Pioneer Corporation | Dielectric constant measuring apparatus, dielectric constant measuring method, and information recording/reproducing apparatus |
US7221639B2 (en) | 2002-07-09 | 2007-05-22 | Pioneer Corporation | Pickup device |
US7336590B2 (en) | 2002-09-11 | 2008-02-26 | Yasuo Cho | Dielectric reproducing apparatus, dielectric recording apparatus, and dielectric recording/reproducing apparatus |
US7385901B2 (en) | 2003-06-12 | 2008-06-10 | Yasuo Cho | Data recording/reproducing apparatus and method using needle-shaped member |
US8004948B2 (en) | 2003-06-12 | 2011-08-23 | Yasuo Cho | Data recording / reproducing apparatus and method using needle-shaped member |
US7590040B2 (en) | 2003-08-25 | 2009-09-15 | Yasuo Cho | Signal detecting method and apparatus and information reproducing apparatus and method |
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