GB1377670A - Disc memory units - Google Patents

Disc memory units

Info

Publication number
GB1377670A
GB1377670A GB2939172A GB2939172A GB1377670A GB 1377670 A GB1377670 A GB 1377670A GB 2939172 A GB2939172 A GB 2939172A GB 2939172 A GB2939172 A GB 2939172A GB 1377670 A GB1377670 A GB 1377670A
Authority
GB
United Kingdom
Prior art keywords
component
carriage
core
disc memory
june
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
GB2939172A
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.)
Bull SA
Original Assignee
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 Bull SA filed Critical Bull SA
Publication of GB1377670A publication Critical patent/GB1377670A/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
    • G11B5/48—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
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • 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
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion

Landscapes

  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Moving Of Heads (AREA)

Abstract

1377670 Moving magnetic heads SOC INDUSTRIELLE HONEYWELL BULL 22 June 1972 [24 June 1971] 29391/72 Heading G5R [Also in Division F2] In a disc memory unit, the magnetic heads are carried by a sliding carriage 1 which is driven by an electric motor 4 of the "voice-coil" type and carries one component 12 of an air dashpot of which the other component 11 is attached to the stationary permanent magnet core 7 of the motor 4. The dashport component 12 may indude a magnetic section (26), Fig. 3 (not shown), attracted to the core 7. As shown, a magnetic shaft 20 secured to the carriage 1 co-operates with a coil 21 in a central bore 22 of the core 7 to generate a signal indicative of the velocity of the carriage 1.
GB2939172A 1971-06-24 1972-06-22 Disc memory units Expired GB1377670A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR717123131A FR2142769B1 (en) 1971-06-24 1971-06-24

Publications (1)

Publication Number Publication Date
GB1377670A true GB1377670A (en) 1974-12-18

Family

ID=9079271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2939172A Expired GB1377670A (en) 1971-06-24 1972-06-22 Disc memory units

Country Status (9)

Country Link
US (1) US3827081A (en)
BE (1) BE785236A (en)
CA (1) CA965182A (en)
CH (1) CH560444A5 (en)
DE (1) DE2230946A1 (en)
FR (1) FR2142769B1 (en)
GB (1) GB1377670A (en)
IT (1) IT956807B (en)
NL (1) NL7207923A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030132A (en) * 1975-03-27 1977-06-14 Memorex Corporation Dual mode velocity servo control for a linear actuator motor
US4131924A (en) * 1977-10-03 1978-12-26 Burroughs Corporation Flexure mounted magnetic head positioner for high-speed translation
US4827162A (en) * 1987-03-02 1989-05-02 Unisys Corp. Controlled drag for magnet actuator
DE69434454T2 (en) * 1993-12-15 2006-03-30 Seagate Removable Storage Solutions Llc. Voice coil controlled positioner for large and fine positioning of a magnetic head in a multi track device
US20030218390A1 (en) * 2002-05-22 2003-11-27 Story Huang Voice-coil motor for picking up chips

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432581A (en) * 1943-07-26 1947-12-16 Milo F Miller Electrical switching apparatus
US2481398A (en) * 1945-06-29 1949-09-06 Armour Res Found Selector system for magnetic wire reproducers
GB1056888A (en) * 1964-10-08 1967-02-01 Flight Refueling Ltd Improvements in or relating to electro-magnetic actuators

Also Published As

Publication number Publication date
DE2230946A1 (en) 1972-12-28
IT956807B (en) 1973-10-10
BE785236A (en) 1972-10-16
NL7207923A (en) 1972-12-28
US3827081A (en) 1974-07-30
CA965182A (en) 1975-03-25
FR2142769A1 (en) 1973-02-02
FR2142769B1 (en) 1973-06-29
SU438206A3 (en) 1974-07-30
CH560444A5 (en) 1975-03-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees