CA922203A - Random access selection apparatus - Google Patents

Random access selection apparatus

Info

Publication number
CA922203A
CA922203A CA091059A CA91059A CA922203A CA 922203 A CA922203 A CA 922203A CA 091059 A CA091059 A CA 091059A CA 91059 A CA91059 A CA 91059A CA 922203 A CA922203 A CA 922203A
Authority
CA
Canada
Prior art keywords
random access
selection apparatus
access selection
random
selection
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
CA091059A
Inventor
L. Johnson Roger
L. Bitzer Donald
E. Bandy Lyle
O. Skaperdas Dominic
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.)
University of Illinois Foundation
Original Assignee
University of Illinois Foundation
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 University of Illinois Foundation filed Critical University of Illinois Foundation
Priority to CA146077A priority Critical patent/CA937675A/en
Application granted granted Critical
Publication of CA922203A publication Critical patent/CA922203A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/18—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors used in combination for obtaining stepwise operation of a single controlled member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/022—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising a deformable member
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/10—Projectors with built-in or built-on screen
    • G03B21/11—Projectors with built-in or built-on screen for microfilm reading
    • G03B21/115—Projectors with built-in or built-on screen for microfilm reading of microfiches
    • G03B21/116—Handling microfiches

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Control Of Position Or Direction (AREA)
  • Fluid-Driven Valves (AREA)
CA091059A 1969-08-18 1970-08-18 Random access selection apparatus Expired CA922203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA146077A CA937675A (en) 1969-08-18 1972-06-29 Random access selection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85096569A 1969-08-18 1969-08-18

Publications (1)

Publication Number Publication Date
CA922203A true CA922203A (en) 1973-03-06

Family

ID=25309584

Family Applications (1)

Application Number Title Priority Date Filing Date
CA091059A Expired CA922203A (en) 1969-08-18 1970-08-18 Random access selection apparatus

Country Status (4)

Country Link
US (1) US3641529A (en)
JP (1) JPS5035635B1 (en)
CA (1) CA922203A (en)
GB (2) GB1322401A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779267A (en) * 1971-07-26 1973-12-18 Leesona Corp Fluid operated logic device
US3789864A (en) * 1973-04-09 1974-02-05 Leesona Corp Fluid operated system
US4020506A (en) * 1975-06-30 1977-04-26 International Business Machines Corporation Tape cartridge with track position indicator
US4669014A (en) * 1983-01-31 1987-05-26 Gill Cantwell Alignment system for magnetic disc drive
GB8826867D0 (en) * 1988-11-17 1988-12-21 Normalair Garrett Ltd Fluid compressors
US5617267A (en) * 1994-12-15 1997-04-01 Kabushiki Kaisha Toshiba Servo data writing apparatus for supporting the free end of a rotating shaft in a magnetic disk device and method of writing servo data

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT593435A (en) * 1957-08-08 1900-01-01
US3177476A (en) * 1961-05-29 1965-04-06 Rca Corp Information storage apparatus utilizing a record of internally reflective, light conducting material
US3153241A (en) * 1961-08-31 1964-10-13 Lab For Electronics Inc Magnetic recorder
US3298008A (en) * 1963-04-17 1967-01-10 Anelex Corp Coarse and fine head positioning apparatus for random access disc memory system
US3449734A (en) * 1965-04-28 1969-06-10 Mohawk Data Sciences Corp Positioning apparatus for a random access storage device using a dual-frequency reference track

Also Published As

Publication number Publication date
GB1322401A (en) 1973-07-04
US3641529A (en) 1972-02-08
GB1322402A (en) 1973-07-04
JPS5035635B1 (en) 1975-11-18

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