GB1455557A - Records and the reproduction of information therefrom - Google Patents

Records and the reproduction of information therefrom

Info

Publication number
GB1455557A
GB1455557A GB4768172A GB4768172A GB1455557A GB 1455557 A GB1455557 A GB 1455557A GB 4768172 A GB4768172 A GB 4768172A GB 4768172 A GB4768172 A GB 4768172A GB 1455557 A GB1455557 A GB 1455557A
Authority
GB
United Kingdom
Prior art keywords
reproduction
records
information therefrom
track
variations
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
GB4768172A
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.)
EMI Ltd
Original Assignee
EMI Ltd
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 EMI Ltd filed Critical EMI Ltd
Priority to GB4768172A priority Critical patent/GB1455557A/en
Publication of GB1455557A publication Critical patent/GB1455557A/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
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
    • G11B9/061—Record carriers characterised by their structure or form or by the selection of the material; Apparatus or processes specially adapted for the manufacture of record carriers

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1455557 Automatic control of position EMI Ltd 14 Jan 1974 [17 Oct 1972] 47681/72 Heading G3R [Also in Division G5] Information is recorded along a track in the form of variations in the thickness of a dielectric layer 1 or 6 between a flat electrically-insulating surface and an electrically-conductive layer 2, 4, 7 or 8. Playback is effected by sensing the variations in capacitance by means of a pair of electrodes 10, 11 on either side of a dielectric skid 9, the signals from the two electrodes controlling a servosystem to centre the skid over the track.
GB4768172A 1972-10-17 1972-10-17 Records and the reproduction of information therefrom Expired GB1455557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4768172A GB1455557A (en) 1972-10-17 1972-10-17 Records and the reproduction of information therefrom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4768172A GB1455557A (en) 1972-10-17 1972-10-17 Records and the reproduction of information therefrom

Publications (1)

Publication Number Publication Date
GB1455557A true GB1455557A (en) 1976-11-17

Family

ID=10445896

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4768172A Expired GB1455557A (en) 1972-10-17 1972-10-17 Records and the reproduction of information therefrom

Country Status (1)

Country Link
GB (1) GB1455557A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384317A1 (en) * 1977-02-09 1978-10-13 Victor Company Of Japan RECORDING DEVICE, ESPECIALLY OF INFORMATION SIGNALS, ON ROTATING MEDIA
EP0148036A2 (en) * 1983-12-30 1985-07-10 Victor Company Of Japan, Limited Electrostatic capacitance type information signal recording medium and manufacturing method thereof
EP0957333A1 (en) * 1998-04-23 1999-11-17 Seiko Instruments Inc. Correlation sample for scanning probe microscope and method of processing the correlation sample
US6405583B1 (en) 1999-04-21 2002-06-18 Seiko Instruments Inc. Correlation sample for scanning probe microscope and method of processing the correlation sample

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384317A1 (en) * 1977-02-09 1978-10-13 Victor Company Of Japan RECORDING DEVICE, ESPECIALLY OF INFORMATION SIGNALS, ON ROTATING MEDIA
EP0148036A2 (en) * 1983-12-30 1985-07-10 Victor Company Of Japan, Limited Electrostatic capacitance type information signal recording medium and manufacturing method thereof
EP0148036A3 (en) * 1983-12-30 1987-11-11 Victor Company Of Japan, Limited Electrostatic capacitance type information signal recording medium and manufacturing method thereof
EP0957333A1 (en) * 1998-04-23 1999-11-17 Seiko Instruments Inc. Correlation sample for scanning probe microscope and method of processing the correlation sample
US6405583B1 (en) 1999-04-21 2002-06-18 Seiko Instruments Inc. Correlation sample for scanning probe microscope and method of processing the correlation sample

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee