GB813754A - Magnetic storage device - Google Patents

Magnetic storage device

Info

Publication number
GB813754A
GB813754A GB2000756A GB2000756A GB813754A GB 813754 A GB813754 A GB 813754A GB 2000756 A GB2000756 A GB 2000756A GB 2000756 A GB2000756 A GB 2000756A GB 813754 A GB813754 A GB 813754A
Authority
GB
United Kingdom
Prior art keywords
head
medium
reading
record
magnetization
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
GB2000756A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB813754A publication Critical patent/GB813754A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/35—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only having vibrating elements
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

813,754. Magnetic recording and reproducing apparatus. STANDARD TELEPHONES & CABLES Ltd. June 28, 1956 [June 29, 1955], No. 20007/56. Class 40 (2). In a method of reading intelligence from a magnetic record, an oscillatory motion is caused to occur between record medium and the reading head or heads in a direction substantially normal to the record medium. The method is of particular use in digital computors in which it is merely necessary to detect one of two states, i.e. magnetization or non-magnetization of the medium, irrespective of the velocity of the medium past the reading head/s. Thus when the medium is in a magnetized state, the relative oscillation induces an E.M.F. in the head, but when unmagnetized no E.M.F. is generated. Fig. 3 shows an embodiment in which a head 1 is mounted on a moving coil system associated with the pole 3 of a magnet system. The head is provided with a number of coils 2 so that the head can perform a number of functions of read, record and erase. When reading is being effected, alternating current is supplied to the movable coil. Fig. 4 shows a system in which a number of heads 10 are mounted on a plate 9 coupled to a base plate 7 by a piezo-electric element 8, which is caused to oscillate at its own characteristic frequency by means of an applied voltage. Fig. 6 (not shown) illustrates an apparatus employing a plurality of such units.
GB2000756A 1955-06-29 1956-06-28 Magnetic storage device Expired GB813754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST10067A DE1121382B (en) 1955-06-29 1955-06-29 Magnetic storage

Publications (1)

Publication Number Publication Date
GB813754A true GB813754A (en) 1959-05-21

Family

ID=7454974

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2000756A Expired GB813754A (en) 1955-06-29 1956-06-28 Magnetic storage device

Country Status (3)

Country Link
DE (1) DE1121382B (en)
FR (1) FR70606E (en)
GB (1) GB813754A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625607A (en) * 1948-05-27 1953-01-13 Eckert Mauchly Comp Corp Pulse recording apparatus
US2686100A (en) * 1948-05-27 1954-08-10 Remington Rand Inc Pulse recording apparatus

Also Published As

Publication number Publication date
FR70606E (en) 1959-06-05
DE1121382B (en) 1962-01-04

Similar Documents

Publication Publication Date Title
US3751693A (en) Moving coil motor with no stray flux
US2962560A (en) Method of demagnetizing a magnetic record
US2423339A (en) Reproducing head for magnetic telegraphones
GB711854A (en) Improvements in magnetic information storage apparatus
GB814942A (en) Improvements in or relating to magnetic systems and devices
GB1528539A (en) Electromagnetic actuator
GB928481A (en) Improvements in and relating to position control systems
GB752415A (en) Improvements in or relating to devices for reading magnetically recorded coded information
US2898408A (en) Magnetic drum eraser
US2424295A (en) Rotatable magnetic reproducing means
GB964973A (en) Improvements in or relating to magnetic transducers
US2680156A (en) Magnetic head for perpendicular recording
GB1121624A (en) Improvements in and relating to magetic heads
US2546829A (en) Magnetic recorder and reproducer
GB976488A (en) Phonograph pickup cartridge and replaceable stylus therefor
GB871680A (en) Method and apparatus for magnetic recording
US2658950A (en) Reproducer for magnetically recorded signals
GB813754A (en) Magnetic storage device
GB1473453A (en) Write-erase apparatus for a rotating head magnetic signal recorder
US2830130A (en) Means for reproducing magnetic recordings
US3148329A (en) Quantity measuring apparatus using a pulse recorder
US2476599A (en) Magazine type magnetic recording apparatus
US3350511A (en) Speed indicator and control system
US2928078A (en) Magnetic transducer
US3855629A (en) Combined magnetic head for recording and playback having adjustable end faces