Patent US4766512A successfully refreshed from Google Patents.
US4766512A
Expired / Lapsed
US
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Device for inspecting the surface of magnetic memory disks
Assignee: Wincor Nixdorf International GmbH
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Filing: 1985-12-19
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Granted: 1988-08-23
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Expires: 2005-12-19
Abstract
Abstract For the inspection of magnetic memory disks (11) a viewing arrangement (17,18,19) is used which can be mounted on the head arm carrier (16) of a magnetic disk memory in place of one or more head arms. It has a bracket (19) which can be moved between the magnetic memory disks (11) and on which is provided the light admission part or optical pickup of the viewing arrangement (17,18,19). The image received by the pickup (20) is conducted to the part of the viewing arrangement (17,18,19) which is located outside of the magnetic memoryt disks (11) on the head arm carrier (16). There the disk surface can conveniently be inspected.
Inventors
- 👤 Michael Bogdanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:45
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B23/505; G11B33/00; G11B33/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
239 words
A device for manually inspecting the surfaces of magnetic memory disks in a magnetic disk memory which contains a read/write head assigned to a selected one of the respective magnetic memory disks, said head held on a head arm and said head arm arranged on a head arm carrier which is movable parallel to the plane of the selected magnetic memory disk, said device including a plurality of memory disks having surfaces that may be damaged or impaired, means for transmitting an optical image of the surface of a selected disk along a path which is parallel to the surface of said selected disk and parallel to a bracket, said path extending from an optical pickup on said bracket to a viewing apparatus which is angularly positioned relative to said bracket for permitting manual inspection to determine whether the selected disk surface is damaged or impaired, means for mounting said bracket on the head arm carrier in place of the head arm, said bracket extending substantially parallel to the plane of the selected magnetic memory disk, and said means for mounting said bracket on said head arm carrier including means for permitting movement of the bracket in the direction of the axis of the selected magnetic disk, and said bracket being movable such that the surfaces of a plurality of magnetic memory disks may be selectively inspected for damage or impairment without removing the disks from the disk memory.
Claim 2
Independent Claim
239 words
A device for manually inspecting the surfaces of magnetic memory disks in a magnetic disk memory which contains a read/write head assigned to a selected one of the respective magnetic memory disks, said head held on a head arm and said head arm arranged on a head arm carrier which is movable parallel to the plane of the selected magnetic memory disk, said device including a plurality of memory disks having surfaces that may be damaged or impaired, means for transmitting an optical image of the surface of a selected disk along a path which is parallel to the surface of said selected disk and parallel to a bracket, said path extending from an optical pickup on said bracket to a viewing apparatus which is angularly positioned relative to said bracket for permitting manual inspection to determine whether the selected disk surface is damaged or impaired, means for mounting said bracket on the head arm carrier in place of the head arm, said bracket extending substantially parallel to the plane of the selected magnetic memory disk, and said means for mounting said bracket on said head arm carrier including means for permitting movement of the bracket in the direction of the axis of the selected magnetic disk, and said bracket being movable such that the surfaces of a plurality of magnetic memory disks may be selectively inspected for damage or impairment without removing the disks from the disk memory.
Claim 3
Dependent Claim
59 words
A device as claimed in claim 1 wherein said bracket includes a free end, and the optical pickup is mounted on the free end of the bracket, and said optical pickup includes an observation mirror which interacts with a deviation mirror for deflecting an observed image that is a reflection of the memory disk surface into said viewing apparatus.
Claim 4
Dependent Claim
16 words
A device as claimed in claim 2 wherein the observation mirror is a rectangular prismatic mirror.
Claim 5
Dependent Claim
16 words
A device as claimed in claim 2 wherein the deviation mirror is a convexly curved mirror.
Claim 6
Dependent Claim
66 words
A device as claimed in claim 1 wherein said means for mounting said bracket on said head arm carrier includes a guiding member and a holding member, said guiding member mounting said viewing apparatus and said bracket, and said guiding member being shiftable in the direction of the selected memory disk axis, and means for locking said guiding member at various positions along said holding member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |