GB1374773A - Linear actuators - Google Patents

Linear actuators

Info

Publication number
GB1374773A
GB1374773A GB3986871A GB3986871A GB1374773A GB 1374773 A GB1374773 A GB 1374773A GB 3986871 A GB3986871 A GB 3986871A GB 3986871 A GB3986871 A GB 3986871A GB 1374773 A GB1374773 A GB 1374773A
Authority
GB
United Kingdom
Prior art keywords
air
apertures
bearings
shaft
aug
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
GB3986871A
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.)
Fujitsu Services Ltd
Original Assignee
Fujitsu Services 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 Fujitsu Services Ltd filed Critical Fujitsu Services Ltd
Priority to GB3986871A priority Critical patent/GB1374773A/en
Priority to FR7230433A priority patent/FR2151417A5/fr
Publication of GB1374773A publication Critical patent/GB1374773A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

1374773 Fluid bearings INTERNATIONAL COMPUTERS Ltd 25 Aug 1972 [25 Aug 1971] 39868/71 Heading F2A [Also in Division H2] The moving member of a linear actuator is supported relative to the stationary member by a fluid bearing. A hollow, axially-movable shaft 1 carries a support 3 for a coil 4 which moves adjacent a polepiece 9 of a stationary magnet 8. The shaft floats in two cylindrical air bearings 2 each having an annular groove 13, to which air is supplied (11, 12), and apertures 14 through which the air is conveyed to the shaft/bearing interface. The support 3 is guided by thrust pads 10 co-operating with a rail 6, each pad including (Fig. 4b), a ring of apertures 16 through which air is supplied to the pad/rail interface, and a central aperture 17 through which the air is exhausted via a hollow pivoted tube (20, Fig. 4a, not shown). The apertures 14, 16 are formed by brass or jewel watchmakers' bearings. The actuator is used to position a magnetic recording head.
GB3986871A 1971-08-25 1971-08-25 Linear actuators Expired GB1374773A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3986871A GB1374773A (en) 1971-08-25 1971-08-25 Linear actuators
FR7230433A FR2151417A5 (en) 1971-08-25 1972-08-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3986871A GB1374773A (en) 1971-08-25 1971-08-25 Linear actuators

Publications (1)

Publication Number Publication Date
GB1374773A true GB1374773A (en) 1974-11-20

Family

ID=10411922

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3986871A Expired GB1374773A (en) 1971-08-25 1971-08-25 Linear actuators

Country Status (2)

Country Link
FR (1) FR2151417A5 (en)
GB (1) GB1374773A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9852937B2 (en) 2014-09-15 2017-12-26 Asml Netherlands B.V. Object table, lithographic apparatus and device manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9852937B2 (en) 2014-09-15 2017-12-26 Asml Netherlands B.V. Object table, lithographic apparatus and device manufacturing method

Also Published As

Publication number Publication date
FR2151417A5 (en) 1973-04-13

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Legal Events

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