GB1446950A - Device for the processing of magnetically recorded data - Google Patents

Device for the processing of magnetically recorded data

Info

Publication number
GB1446950A
GB1446950A GB4503673A GB4503673A GB1446950A GB 1446950 A GB1446950 A GB 1446950A GB 4503673 A GB4503673 A GB 4503673A GB 4503673 A GB4503673 A GB 4503673A GB 1446950 A GB1446950 A GB 1446950A
Authority
GB
United Kingdom
Prior art keywords
disc
processing
recorded data
sept
magnetically recorded
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
GB4503673A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1446950A publication Critical patent/GB1446950A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/107—Grooves for generating pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/045—Sliding-contact bearings for exclusively rotary movement for axial load only with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep bearings
    • 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

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Magnetic Record Carriers (AREA)
  • Sliding-Contact Bearings (AREA)
  • Moving Of Heads (AREA)

Abstract

1446950 Magnetic disc recording and playback PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 26 Sept 1973 [29 Sept 1972] 45036/73 Heading G5R A magnetic disc 1 rotates close to a plate 4 carrying one or more magnetic heads 5, 5<SP>1</SP> and having in its surface facing the disc 1 two groove patterns I, II which respectively produce opposite fluid pressures in the gap between the plate 4 and the disc 1, the resultant thrust on each being zero at a chosen gap height h 1 . As described, the grooves 6 of pattern I are of depth h 1 and the grooves 7 of pattern II have a depth of at least 5h 1 .
GB4503673A 1972-09-29 1973-09-26 Device for the processing of magnetically recorded data Expired GB1446950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7213193A NL7213193A (en) 1972-09-29 1972-09-29

Publications (1)

Publication Number Publication Date
GB1446950A true GB1446950A (en) 1976-08-18

Family

ID=19817035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4503673A Expired GB1446950A (en) 1972-09-29 1973-09-26 Device for the processing of magnetically recorded data

Country Status (9)

Country Link
JP (1) JPS4973113A (en)
CA (1) CA997861A (en)
CH (1) CH563646A5 (en)
DE (1) DE2345407C2 (en)
FR (1) FR2201514B3 (en)
GB (1) GB1446950A (en)
IT (1) IT994384B (en)
NL (1) NL7213193A (en)
SE (1) SE395195B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5795074A (en) * 1996-10-08 1998-08-18 Seagate Technology, Inc. Grooved hydrodynamic thrust bearing
DE102009009505A1 (en) * 2009-02-18 2010-09-16 Minebea Co., Ltd. Conical bearing surface for fluid dynamic bearing system for spindle motor of storage disk drive, has area with smaller diameter and area with larger diameter, where inner bearing grooves are arranged in distributed manner in area

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2323133B (en) * 1996-01-08 1999-11-03 Seagate Technology Grooved hydrodynamic thrust bearing
CN110594288B (en) * 2019-09-29 2024-03-08 中国矿业大学 Magnetic control flexible tile thrust sliding bearing based on nano magnetic liquid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4913012A (en) * 1972-05-17 1974-02-05

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5795074A (en) * 1996-10-08 1998-08-18 Seagate Technology, Inc. Grooved hydrodynamic thrust bearing
DE102009009505A1 (en) * 2009-02-18 2010-09-16 Minebea Co., Ltd. Conical bearing surface for fluid dynamic bearing system for spindle motor of storage disk drive, has area with smaller diameter and area with larger diameter, where inner bearing grooves are arranged in distributed manner in area

Also Published As

Publication number Publication date
CH563646A5 (en) 1975-06-30
FR2201514A1 (en) 1974-04-26
SE395195B (en) 1977-08-01
JPS4973113A (en) 1974-07-15
DE2345407C2 (en) 1983-12-15
NL7213193A (en) 1974-04-02
CA997861A (en) 1976-09-28
FR2201514B3 (en) 1976-08-27
DE2345407A1 (en) 1974-04-11
IT994384B (en) 1975-10-20

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Legal Events

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