FR1601336A - - Google Patents

Info

Publication number
FR1601336A
FR1601336A FR1601336DA FR1601336A FR 1601336 A FR1601336 A FR 1601336A FR 1601336D A FR1601336D A FR 1601336DA FR 1601336 A FR1601336 A FR 1601336A
Authority
FR
France
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
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 filed Critical
Application granted granted Critical
Publication of FR1601336A publication Critical patent/FR1601336A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1215—Formatting, e.g. arrangement of data block or words on the record carriers on cards
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G06K7/084—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing magnetic material by relative movement detecting flux changes without altering its magnetised state
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1816—Testing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
FR1601336D 1968-01-15 1968-11-29 Expired FR1601336A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69773568A 1968-01-15 1968-01-15

Publications (1)

Publication Number Publication Date
FR1601336A true FR1601336A (fr) 1970-08-17

Family

ID=24802323

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1601336D Expired FR1601336A (fr) 1968-01-15 1968-11-29

Country Status (11)

Country Link
US (1) US3530448A (fr)
AT (1) AT298834B (fr)
BE (1) BE725197A (fr)
CH (1) CH493060A (fr)
DK (1) DK131213B (fr)
ES (1) ES361916A1 (fr)
FI (1) FI51015C (fr)
FR (1) FR1601336A (fr)
GB (1) GB1210587A (fr)
NL (1) NL160961C (fr)
SE (1) SE358761B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452148A1 (fr) * 1979-03-21 1980-10-17 Automatisme Cie Gle Procede d'enregistrement magnetique

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898432A (en) * 1973-06-20 1975-08-05 Ibm Read/write machine for magnetic stripped document card
US3946206A (en) * 1974-08-21 1976-03-23 R. D. Products, Inc. Magnetic-type information card and method and apparatus for encoding and reading
US4017857A (en) * 1975-03-03 1977-04-12 Evans Jr Howard M Computer time clock
US4110803A (en) * 1977-01-28 1978-08-29 Xerox Corporation Magnetic head assembly adjustable relative to roll, pitch and azimuth
US4159799A (en) * 1977-12-14 1979-07-03 Bell Telephone Laboratories, Incorporated Cassette unit and fixture for loading the unit with a planar member
DE3241400A1 (de) * 1982-11-09 1984-05-10 Nixdorf Computer Ag, 4790 Paderborn Verfahren und einrichtung zur fortlaufenden aufzeichnung von informationssignalen vorbestimmter laenge auf eine magnetspeicherspur
GB2136618A (en) * 1983-02-14 1984-09-19 Bryan Frederick Nicholls Data recording and storage arrangement
GB2264580A (en) * 1992-02-27 1993-09-01 Siemens Measurements Ltd Metering apparatus including a token reader

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL236625A (fr) * 1958-03-03
US3136465A (en) * 1961-12-20 1964-06-09 Potter Instrument Co Inc Tape back-space device
US3395405A (en) * 1965-06-01 1968-07-30 Ibm Transducing apparatus requiring no interrecord gaps on a record carrier
US3444541A (en) * 1965-06-21 1969-05-13 Ibm Tape inter-block gap size control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452148A1 (fr) * 1979-03-21 1980-10-17 Automatisme Cie Gle Procede d'enregistrement magnetique

Also Published As

Publication number Publication date
DK131213B (da) 1975-06-09
NL160961B (nl) 1979-07-16
CH493060A (de) 1970-06-30
FI51015B (fr) 1976-05-31
DE1900902A1 (de) 1969-08-07
NL160961C (nl) 1979-12-17
BE725197A (fr) 1969-05-16
ES361916A1 (es) 1970-11-01
DK131213C (fr) 1975-11-10
SE358761B (fr) 1973-08-06
NL6900172A (fr) 1969-07-17
AT298834B (de) 1972-05-25
US3530448A (en) 1970-09-22
FI51015C (fi) 1976-09-10
DE1900902B2 (de) 1975-06-05
GB1210587A (en) 1970-10-28

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Legal Events

Date Code Title Description
ST Notification of lapse