FR2490387B1 - - Google Patents

Info

Publication number
FR2490387B1
FR2490387B1 FR8114645A FR8114645A FR2490387B1 FR 2490387 B1 FR2490387 B1 FR 2490387B1 FR 8114645 A FR8114645 A FR 8114645A FR 8114645 A FR8114645 A FR 8114645A FR 2490387 B1 FR2490387 B1 FR 2490387B1
Authority
FR
France
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
FR8114645A
Other languages
French (fr)
Other versions
FR2490387A1 (fr
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of FR2490387A1 publication Critical patent/FR2490387A1/fr
Application granted granted Critical
Publication of FR2490387B1 publication Critical patent/FR2490387B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Linear Motors (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Control Of Position Or Direction (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
FR8114645A 1980-09-15 1981-07-28 Systeme de transducteur ayant une plus grande capacite de poursuite Granted FR2490387A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/187,265 US4378519A (en) 1980-09-15 1980-09-15 Transducer system with increased tracking capability

Publications (2)

Publication Number Publication Date
FR2490387A1 FR2490387A1 (fr) 1982-03-19
FR2490387B1 true FR2490387B1 (OSRAM) 1984-06-22

Family

ID=22688273

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8114645A Granted FR2490387A1 (fr) 1980-09-15 1981-07-28 Systeme de transducteur ayant une plus grande capacite de poursuite

Country Status (3)

Country Link
US (1) US4378519A (OSRAM)
JP (1) JPS5782255A (OSRAM)
FR (1) FR2490387A1 (OSRAM)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4419701A (en) * 1981-09-21 1983-12-06 Quantum Corporation Data transducer position control system for rotating disk data storage equipment
US4499510A (en) * 1982-08-03 1985-02-12 Weltec Digital, Inc. Precision alignment system for information storage devices
JPS61211711A (ja) * 1985-03-16 1986-09-19 Pioneer Electronic Corp 位相比較器
US5867023A (en) * 1997-02-04 1999-02-02 Sunstrand Corporation Converter circuit for rotary transformer sensing devices

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1214307B (de) * 1964-08-06 1966-04-14 Siemens Ag Regeleinrichtung zur Positionierung von Arbeitsmaschinen
USRE30161E (en) 1970-03-30 1979-11-27 Xerox Corporation Apparatus measuring relative velocity of movable members including means to detect velocity from the position encoder
US4086636A (en) * 1977-02-28 1978-04-25 Xerox Corporation Restore method and apparatus for disk drive
US4270073A (en) * 1979-02-28 1981-05-26 Persci, Inc. Position control in disk drive system
US4272818A (en) * 1979-07-19 1981-06-09 The Bendix Corporation Position feedback control system for a numerically controlled machine tool
US4319172A (en) * 1980-02-25 1982-03-09 Tracer Control Company Numerical control system

Also Published As

Publication number Publication date
US4378519A (en) 1983-03-29
FR2490387A1 (fr) 1982-03-19
JPS5782255A (en) 1982-05-22

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Legal Events

Date Code Title Description
ST Notification of lapse