GB1480468A - Disc stack data storage apparatus - Google Patents
Disc stack data storage apparatusInfo
- Publication number
- GB1480468A GB1480468A GB1296376A GB1296376A GB1480468A GB 1480468 A GB1480468 A GB 1480468A GB 1296376 A GB1296376 A GB 1296376A GB 1296376 A GB1296376 A GB 1296376A GB 1480468 A GB1480468 A GB 1480468A
- Authority
- GB
- United Kingdom
- Prior art keywords
- data storage
- storage apparatus
- stack data
- disc stack
- stack
- 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
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
- G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
- G11B5/553—Details
- G11B5/5547—"Seek" control and circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/021—Selecting or spacing of record carriers for introducing the heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
Landscapes
- Special Chairs (AREA)
- Combinations Of Kitchen Furniture (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
1480468 Magnetic disc recording and playback INTERNATIONAL BUSINESS MACHINES CORP 31 March 1976 [14 April 1975] 12963/76 Heading G5R In a rotary stack 15 of flexible data-storage discs 11, each disc 11 has an outermost track carrying identifying signals, e.g. of a characteristic frequency, which enable a magnetic sensing apparatus 30 just outside the stack to identify its axial position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB511576A GB1499071A (en) | 1976-02-10 | 1976-02-10 | Bed unit |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1480468A true GB1480468A (en) | 1977-07-20 |
Family
ID=9789999
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB511576A Expired GB1499071A (en) | 1976-02-10 | 1976-02-10 | Bed unit |
GB1296376A Expired GB1480468A (en) | 1976-02-10 | 1976-03-31 | Disc stack data storage apparatus |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB511576A Expired GB1499071A (en) | 1976-02-10 | 1976-02-10 | Bed unit |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB1499071A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0068803A1 (en) * | 1981-06-30 | 1983-01-05 | Rodime PLC | A method of and apparatus for, generating a unique index mark from the commutation signal of a d.c. brushless motor |
-
1976
- 1976-02-10 GB GB511576A patent/GB1499071A/en not_active Expired
- 1976-03-31 GB GB1296376A patent/GB1480468A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0068803A1 (en) * | 1981-06-30 | 1983-01-05 | Rodime PLC | A method of and apparatus for, generating a unique index mark from the commutation signal of a d.c. brushless motor |
Also Published As
Publication number | Publication date |
---|---|
GB1499071A (en) | 1978-01-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |