CA952229A - Position-measuring transformer having end-detecting windings useful for positioning a magnetic head of a disc drive system - Google Patents

Position-measuring transformer having end-detecting windings useful for positioning a magnetic head of a disc drive system

Info

Publication number
CA952229A
CA952229A CA136,514A CA136514A CA952229A CA 952229 A CA952229 A CA 952229A CA 136514 A CA136514 A CA 136514A CA 952229 A CA952229 A CA 952229A
Authority
CA
Canada
Prior art keywords
positioning
drive system
magnetic head
disc drive
measuring transformer
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
CA136,514A
Other versions
CA136514S (en
Inventor
Clair L. Farrand
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.)
Inductosyn Corp
Original Assignee
Inductosyn Corp
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 Inductosyn Corp filed Critical Inductosyn Corp
Application granted granted Critical
Publication of CA952229A publication Critical patent/CA952229A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/12—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable coil, winding, or part thereof; having movable shield
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/20—Control of position or direction using feedback using a digital comparing device
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
CA136,514A 1971-03-08 1972-03-08 Position-measuring transformer having end-detecting windings useful for positioning a magnetic head of a disc drive system Expired CA952229A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12195171A 1971-03-08 1971-03-08

Publications (1)

Publication Number Publication Date
CA952229A true CA952229A (en) 1974-07-30

Family

ID=22399715

Family Applications (1)

Application Number Title Priority Date Filing Date
CA136,514A Expired CA952229A (en) 1971-03-08 1972-03-08 Position-measuring transformer having end-detecting windings useful for positioning a magnetic head of a disc drive system

Country Status (11)

Country Link
US (1) US3673584A (en)
JP (1) JPS5118181B1 (en)
AU (1) AU466533B2 (en)
CA (1) CA952229A (en)
CH (1) CH555531A (en)
DE (1) DE2210470B2 (en)
FR (1) FR2136011A5 (en)
GB (1) GB1341655A (en)
IT (1) IT958694B (en)
NO (1) NO133602C (en)
SE (1) SE383781B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725760A (en) * 1969-03-10 1973-04-03 Bendix Corp Automatic plotter utilizing a coordinate grid device
FR2120410A5 (en) * 1970-12-31 1972-08-18 Honeywell Bull Soc Ind
US3772587A (en) * 1972-03-15 1973-11-13 Inductosyn Corp Position measuring transformer
JPS51115852A (en) * 1975-04-04 1976-10-12 Nissan Motor Co Ltd Detector of the revolving angle and revolution of a revolving body
IT1072337B (en) * 1976-05-18 1985-04-10 Olivetti Controllo Numerico Cp PRECISION TRANSDUCER FOR POSITION MEASUREMENTS AND RELATED MANUFACTURING PROCESS
US4863039A (en) * 1983-12-23 1989-09-05 Three Phoenix Company Apparatus and method for handling a flexible disk for testing
US4893078A (en) * 1987-05-28 1990-01-09 Auchterlonie Richard C Absolute position sensing using sets of windings of different pitches providing respective indications of phase proportional to displacement
US4893077A (en) * 1987-05-28 1990-01-09 Auchterlonie Richard C Absolute position sensor having multi-layer windings of different pitches providing respective indications of phase proportional to displacement
US4918418A (en) * 1988-08-04 1990-04-17 Caterpillar Inc. Inductive coil structure with electrical return path
US5239288A (en) * 1990-03-09 1993-08-24 Transicoil Inc. Resolver having planar windings
JP2653011B2 (en) * 1993-05-14 1997-09-10 日本電気株式会社 Inductosin substrate
US6750575B2 (en) 2001-08-21 2004-06-15 General Electric Company Method and apparatus for sensing the angular position of a rotating member

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915722A (en) * 1957-05-13 1959-12-01 Inductosyn Corp Pattern for slider of position measuring transformer
BE711079A (en) * 1968-02-21 1968-08-21 Acec METHOD AND DEVICE FOR MEASURING THE DISTANCE TAKEN BY A GUIDED JOURNEY VEHICLE, FOR EXAMPLE RAILWAY OR THE LIKE.
US3522568A (en) * 1969-03-13 1970-08-04 Inductosyn Corp Tape scale for position measuring transformer

Also Published As

Publication number Publication date
FR2136011A5 (en) 1972-12-22
GB1341655A (en) 1973-12-25
NO133602B (en) 1976-02-16
DE2210470B2 (en) 1973-11-08
AU466533B2 (en) 1973-09-13
IT958694B (en) 1973-10-30
NO133602C (en) 1976-05-26
DE2210470A1 (en) 1972-10-19
AU3973272A (en) 1973-09-13
JPS5118181B1 (en) 1976-06-08
DE2210470C3 (en) 1974-06-06
SE383781B (en) 1976-03-29
CH555531A (en) 1974-10-31
US3673584A (en) 1972-06-27

Similar Documents

Publication Publication Date Title
CA960773A (en) Driving device for the linear positioning of magnetic heads
CA974643A (en) Head carriage assembly for magnetic disk storage drive
CA963739A (en) Magnetic recording tape
CA958482A (en) Magnetic recording disc
CA952229A (en) Position-measuring transformer having end-detecting windings useful for positioning a magnetic head of a disc drive system
CA950803A (en) Single crystal ferrite magnetic head
CA991828A (en) Method for manufacturing a magnetic head
AU466336B2 (en) A magnetic transducing head
CA953021A (en) Magnetic recording head
CA1012241A (en) Drive for magnetic recording disc or tape cassettes
CA1014656A (en) Head carriage assembly for magnetic disk storage apparatus
CA936958A (en) Magnetic recording head having a non-magnetic ferrite gap
AU4846672A (en) A device for controlling the excitation current ofa coil producing a magnetic flux of reversible polarity
CA989064A (en) Mounting arrangement for magnetic tape head
CA963321A (en) Dual-layer magnetic recording tape
CA932314A (en) Magnetic tape recorder having a friction wheel drive for the spool carrier of the tape
CA951298A (en) Magnetic tape unit having a pneumatic reel hub
CA955050A (en) Method of making a multi-channel magnetic head
CA1032650A (en) Tape transport for magnetic recording with a rotating head
CA969433A (en) Magnetic recording media
CA1017058A (en) Magnetic tape head indexing assembly for cartridge type tape player
CA980185A (en) Magnetic recording members
CA860230A (en) Method for making a magnetic head core
CA949777A (en) Mn-zn ferrites for magnetic heads
CA878759A (en) Drive assembly for magnetic tape recorder