GB1396367A - Magnetic memory system - Google Patents

Magnetic memory system

Info

Publication number
GB1396367A
GB1396367A GB4385872A GB4385872A GB1396367A GB 1396367 A GB1396367 A GB 1396367A GB 4385872 A GB4385872 A GB 4385872A GB 4385872 A GB4385872 A GB 4385872A GB 1396367 A GB1396367 A GB 1396367A
Authority
GB
United Kingdom
Prior art keywords
signal
error
array
memory system
magnetic memory
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
GB4385872A
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.)
Grumman Corp
Original Assignee
Grumman Data Systems 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 Grumman Data Systems Corp filed Critical Grumman Data Systems Corp
Priority to GB4385872A priority Critical patent/GB1396367A/en
Publication of GB1396367A publication Critical patent/GB1396367A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

1396367 Automatic control of position GRUMMAN DATA SYSTEMS CORP 21 Sept 1972 43858/72 Heading G3N [Also in Divisions G4-6 and H3] A data storage system includes at least one array 21 of tape cassettes which is rotatable under servocontrol for selection of a particular cassette. An error signal is derived by means of a transformer 60 whose rotor moves with array turntable 23. A signal representing the desired position is applied at 54, 58, 59 to the stator and induces an error signal in the rotor which is detected at 63 and applied to a phase-sensitive demodulator/amplifier 66 (see Division H3) to provide a position-error and drive-direction signal. This is summed at 90 with a velocity feedback signal from a tachometer 67 and is used to control magnetic clutches 31.
GB4385872A 1972-09-21 1972-09-21 Magnetic memory system Expired GB1396367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4385872A GB1396367A (en) 1972-09-21 1972-09-21 Magnetic memory system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4385872A GB1396367A (en) 1972-09-21 1972-09-21 Magnetic memory system

Publications (1)

Publication Number Publication Date
GB1396367A true GB1396367A (en) 1975-06-04

Family

ID=10430626

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4385872A Expired GB1396367A (en) 1972-09-21 1972-09-21 Magnetic memory system

Country Status (1)

Country Link
GB (1) GB1396367A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145724A (en) * 1976-07-16 1979-03-20 Consolidated Electronic Industries Pty., Ltd. Automated magnetic tape cartridge retrieval handling and replay machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145724A (en) * 1976-07-16 1979-03-20 Consolidated Electronic Industries Pty., Ltd. Automated magnetic tape cartridge retrieval handling and replay machine

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees