GB708780A - Improvements in or relating to reading devices controlled by magnetic record cards - Google Patents

Improvements in or relating to reading devices controlled by magnetic record cards

Info

Publication number
GB708780A
GB708780A GB12476/52A GB1247652A GB708780A GB 708780 A GB708780 A GB 708780A GB 12476/52 A GB12476/52 A GB 12476/52A GB 1247652 A GB1247652 A GB 1247652A GB 708780 A GB708780 A GB 708780A
Authority
GB
United Kingdom
Prior art keywords
triode
reading
head
amplifier
marks
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
GB12476/52A
Other languages
English (en)
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.)
Compagnie des Machines Bull SA
Original Assignee
Compagnie des Machines Bull SA
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 Compagnie des Machines Bull SA filed Critical Compagnie des Machines Bull SA
Publication of GB708780A publication Critical patent/GB708780A/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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00804—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic sheets
    • G11B5/00808—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic sheets magnetic cards

Landscapes

  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Credit Cards Or The Like (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Digital Magnetic Recording (AREA)
GB12476/52A 1951-05-17 1952-05-16 Improvements in or relating to reading devices controlled by magnetic record cards Expired GB708780A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1037200T 1951-05-17

Publications (1)

Publication Number Publication Date
GB708780A true GB708780A (en) 1954-05-12

Family

ID=9586871

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12476/52A Expired GB708780A (en) 1951-05-17 1952-05-16 Improvements in or relating to reading devices controlled by magnetic record cards

Country Status (4)

Country Link
US (1) US2781972A (cg-RX-API-DMAC7.html)
BE (1) BE511266A (cg-RX-API-DMAC7.html)
FR (1) FR1037200A (cg-RX-API-DMAC7.html)
GB (1) GB708780A (cg-RX-API-DMAC7.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1189777B (de) * 1962-08-16 1965-03-25 Mathews B C Schlegelmaehhaecksler

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970299A (en) * 1955-05-20 1961-01-31 Burroughs Corp Electrographic recording with magnetic material
NL244390A (cg-RX-API-DMAC7.html) * 1958-10-16
NL253925A (cg-RX-API-DMAC7.html) * 1959-07-17
DE1197657B (de) * 1960-03-25 1965-07-29 Telefunken Patent Verfahren zur Ermittlung der Seitenlage von magnetisierbare Zeichen tragenden Folien und Einrichtung zur Durchfuehrung des Verfahrens
US3221431A (en) * 1961-12-29 1965-12-07 Ibm Strip drive and positioning mechanism
AU478754B2 (en) * 1974-02-14 1975-08-14 Access Control Systems (Australia) Pty. Ltd. Magnetic identification apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2084848A (en) * 1933-11-17 1937-06-22 Jr William W Lasker Statistical card
FR838421A (fr) * 1937-05-27 1939-03-06 Ibm Moyens et méthode de calcul
US2501126A (en) * 1946-10-18 1950-03-21 Indiana Steel Products Co Magnetic record medium
US2496047A (en) * 1947-06-18 1950-01-31 Rca Corp Art of recording and reproducing two-sided magnetic records
BE485289A (cg-RX-API-DMAC7.html) * 1947-10-16
US2584714A (en) * 1949-06-21 1952-02-05 Fed Products Corp Differential measuring gauge
US2643130A (en) * 1949-11-02 1953-06-23 Brush Dev Co Multilayer magnetic record member

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1189777B (de) * 1962-08-16 1965-03-25 Mathews B C Schlegelmaehhaecksler

Also Published As

Publication number Publication date
FR1037200A (fr) 1953-09-15
US2781972A (en) 1957-02-19
BE511266A (cg-RX-API-DMAC7.html)

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