GB1168651A - Improvements in or relating to Magnetic Recording. - Google Patents
Improvements in or relating to Magnetic Recording.Info
- Publication number
- GB1168651A GB1168651A GB42016/66A GB4201666A GB1168651A GB 1168651 A GB1168651 A GB 1168651A GB 42016/66 A GB42016/66 A GB 42016/66A GB 4201666 A GB4201666 A GB 4201666A GB 1168651 A GB1168651 A GB 1168651A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recording
- tape
- item
- moving
- cell
- 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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1497—Details of time redundant execution on a single processing unit
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1816—Testing
-
- 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
- G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
1,168,651. Magnetic recording. AMPEX CORP. 20 Sept., 1966 [11 Oct., 1965], No. 42016/66. Headings G4C and G5R. In a system of recording and verifying the recording of information, a magnetic member such as tape 12 is moved discontinuously past a recording and reading head 25, a recording item moving between recordings to produce a verifying signal. Due to fringing effects the width of an item, as first recorded, is greater than the magnetic gap width which, in turn is greater than the final data cell length. Data A, from source 27 is applied to the recording head as energization B, and to register 54 and also over circuits 47, 48, 45 to cause drive motor 16 to advance the tape by one cell. Recording takes place when the tape is stationary (or slowly moving) and during the acceleration, and moving to the next recording position, a signal is induced in the reading a playback circuits by the trailing boundary of the recorded item and fed over circuits 50, 51, 53 to comparator 56 to produce an error signal if the inputs from registers 53, 54 are not in agreement. The end of a data cell is determined by light 37 and associated cell 40. Reference has been directed by the Comptroller to Specification 1,099,568.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49444265A | 1965-10-11 | 1965-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1168651A true GB1168651A (en) | 1969-10-29 |
Family
ID=23964491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB42016/66A Expired GB1168651A (en) | 1965-10-11 | 1966-09-20 | Improvements in or relating to Magnetic Recording. |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE688055A (en) |
| DE (1) | DE1499592A1 (en) |
| FR (1) | FR1496316A (en) |
| GB (1) | GB1168651A (en) |
| NL (1) | NL6613929A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2631129B1 (en) * | 1988-05-04 | 1990-07-27 | Bull Sa | DEVICE FOR DETECTING CUT AND SHORT CIRCUITS IN AT LEAST ONE PORTION OF ELECTRIC CIRCUIT |
-
1966
- 1966-09-20 GB GB42016/66A patent/GB1168651A/en not_active Expired
- 1966-10-03 NL NL6613929A patent/NL6613929A/xx unknown
- 1966-10-10 BE BE688055D patent/BE688055A/xx unknown
- 1966-10-10 FR FR79292A patent/FR1496316A/en not_active Expired
- 1966-10-11 DE DE19661499592 patent/DE1499592A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR1496316A (en) | 1967-09-29 |
| BE688055A (en) | 1967-03-16 |
| DE1499592A1 (en) | 1969-10-30 |
| NL6613929A (en) | 1967-04-12 |
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