GB1520251A - Protection of a recording medium - Google Patents
Protection of a recording mediumInfo
- Publication number
- GB1520251A GB1520251A GB31144/74A GB3114474A GB1520251A GB 1520251 A GB1520251 A GB 1520251A GB 31144/74 A GB31144/74 A GB 31144/74A GB 3114474 A GB3114474 A GB 3114474A GB 1520251 A GB1520251 A GB 1520251A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tape
- hubs
- electropositive
- reels
- july
- 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
- 239000000463 material Substances 0.000 abstract 6
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 239000012212 insulator Substances 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000013535 sea water Substances 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract 1
- 229910000586 vicalloy Inorganic materials 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 239000011701 zinc Substances 0.000 abstract 1
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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
-
- G—PHYSICS
- G12—INSTRUMENT DETAILS
- G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
- G12B17/00—Screening
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/021—Containers; Storing means both adapted to cooperate with the recording or reproducing means comprising means for reducing influence of physical parameters, e.g. temperature change, moisture
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/06—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using web-form record carriers, e.g. tape
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
1520251 Protecting magnetic recording media EMI Ltd 14 July 1975 [13 July 1974] 31144/74 Heading B8M A recording device comprises reels 11 and 12 having hubs 13 and 15 which are preferably made of zinc or magnesium based alloys, a metal magnetic recording tape 2, preferably made of "VICALLOY" (Registered Trade Mark) which is an alloy of iron, cobalt, vanadium elements and supported on the reels 11, 12 in contact with the hubs 13, 15 by having their ends attached in. angled slots 16, whereby when the tape 2 and the reels 11, 12 are immersed in an electrolytic medium such as sea-water the hubs 13, 15 being of higher electropositive material relative to the material of the tape 2 act as a sacrificial electrode, thereby delaying the corrosion of the tape 2. The device is used in the "black box" of an aircraft. The hubs 13, 15 may be made of different materials provided they are more electropositive than the material of the tape 2. The hubs can be protected against too rapid dissolution by covering part of the surface with an insulator such as a plastics film or the hub material may be such that it is slightly more electropositive than the material of the tape 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB31144/74A GB1520251A (en) | 1975-07-14 | 1975-07-14 | Protection of a recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB31144/74A GB1520251A (en) | 1975-07-14 | 1975-07-14 | Protection of a recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1520251A true GB1520251A (en) | 1978-08-02 |
Family
ID=10318674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31144/74A Expired GB1520251A (en) | 1975-07-14 | 1975-07-14 | Protection of a recording medium |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1520251A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4409670A (en) * | 1981-06-26 | 1983-10-11 | United Technologies Corporation | Solid-state digital flight data recorder |
-
1975
- 1975-07-14 GB GB31144/74A patent/GB1520251A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4409670A (en) * | 1981-06-26 | 1983-10-11 | United Technologies Corporation | Solid-state digital flight data recorder |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |