IT1019432B - Testina di lettura per riproduttore di dischi video - Google Patents
Testina di lettura per riproduttore di dischi videoInfo
- Publication number
- IT1019432B IT1019432B IT53264/74A IT5326474A IT1019432B IT 1019432 B IT1019432 B IT 1019432B IT 53264/74 A IT53264/74 A IT 53264/74A IT 5326474 A IT5326474 A IT 5326474A IT 1019432 B IT1019432 B IT 1019432B
- Authority
- IT
- Italy
- Prior art keywords
- video disc
- disc player
- reading head
- reading
- head
- Prior art date
Links
Classifications
-
- 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
- G11B17/32—Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing
-
- 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
- G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
- G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/402,635 US3947888A (en) | 1973-10-01 | 1973-10-01 | Hydrodynamic bearing head providing constant spacing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1019432B true IT1019432B (it) | 1977-11-10 |
Family
ID=23592717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT53264/74A IT1019432B (it) | 1973-10-01 | 1974-09-30 | Testina di lettura per riproduttore di dischi video |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3947888A (it) |
| JP (1) | JPS5127566B2 (it) |
| CA (1) | CA1050163A (it) |
| FR (1) | FR2246934B1 (it) |
| GB (1) | GB1482267A (it) |
| IT (1) | IT1019432B (it) |
| NL (1) | NL160418C (it) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2312832A1 (fr) * | 1975-05-30 | 1976-12-24 | Thomson Brandt | Dispositif de stabilisation de disques souples, et notamment de video-disques, et appareil de lecture adapte a ce dispositif |
| US4067639A (en) * | 1976-05-27 | 1978-01-10 | Xerox Corporation | Holographic scanning spinner |
| US4353615A (en) * | 1978-07-03 | 1982-10-12 | Xerox Corporation | Dynamic mounting for holographic spinners |
| JPS56123182U (it) * | 1980-02-21 | 1981-09-19 | ||
| US4488279A (en) * | 1980-10-20 | 1984-12-11 | Discovision Associates | Video recorder-playback machine |
| US4467467A (en) * | 1980-10-20 | 1984-08-21 | Discovision Associates | Video recorder-playback machine |
| FR2539883B1 (fr) * | 1983-01-25 | 1987-11-06 | Bull Sa | Dispositif optique de focalisation pour la lecture d'un support d'informations defilant devant lui |
| US4507774A (en) * | 1983-03-11 | 1985-03-26 | Eastman Kodak Company | Optical disc and disc-turntable air flow interface assembly |
| US5150338A (en) * | 1989-08-10 | 1992-09-22 | Hewlett-Packard Company | Optical disk reading and writing system having magnetic write head mounted on an air-bearing slider |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2905768A (en) * | 1954-09-24 | 1959-09-22 | Ibm | Air head |
| US3178719A (en) * | 1961-07-20 | 1965-04-13 | Lab For Electronics Inc | Magnetic disc |
| US3327916A (en) * | 1965-06-14 | 1967-06-27 | Ibm | Vacuum controlled air film |
-
1973
- 1973-10-01 US US05/402,635 patent/US3947888A/en not_active Expired - Lifetime
-
1974
- 1974-09-03 NL NL7411709.A patent/NL160418C/xx not_active IP Right Cessation
- 1974-09-27 GB GB42160/74A patent/GB1482267A/en not_active Expired
- 1974-09-30 CA CA210,353A patent/CA1050163A/en not_active Expired
- 1974-09-30 JP JP49111780A patent/JPS5127566B2/ja not_active Expired
- 1974-09-30 IT IT53264/74A patent/IT1019432B/it active
- 1974-10-01 FR FR7433060A patent/FR2246934B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3947888A (en) | 1976-03-30 |
| FR2246934A1 (it) | 1975-05-02 |
| JPS5062406A (it) | 1975-05-28 |
| DE2443078B2 (de) | 1976-11-04 |
| GB1482267A (en) | 1977-08-10 |
| FR2246934B1 (it) | 1978-04-28 |
| NL160418C (nl) | 1979-10-15 |
| CA1050163A (en) | 1979-03-06 |
| NL160418B (nl) | 1979-05-15 |
| JPS5127566B2 (it) | 1976-08-13 |
| DE2443078A1 (de) | 1975-04-17 |
| NL7411709A (nl) | 1975-04-03 |
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