GB644426A - Improvements in or relating to sound recording and reproducing systems - Google Patents

Improvements in or relating to sound recording and reproducing systems

Info

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
Application number
GB2323747A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB2323747A priority Critical patent/GB644426A/en
Publication of GB644426A publication Critical patent/GB644426A/en
Expired legal-status Critical Current

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.
GB2323747A 1947-08-21 1947-08-21 Improvements in or relating to sound recording and reproducing systems Expired GB644426A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (13)

* Cited by examiner, † Cited by third party
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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