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| Number | Title | Issue Date |
| 5497057 | Mechanical brake hold circuit for an electric motor An automated tape library employing a motorized robotic picker wherein the electric motor driving the robotic picker is equipped with two brakes that act simultaneously. The first is a mechanical brake which uses a spring to push a brake pad against the r... | 03/05/1996 |
| 5471561 | Automated storage library with rotatable arm and oblique angle effectors An automated storage library includes a robotic picker which moves linearly between linear and/or carousel storage shelves to transport data storage cassettes between the shelves and a data transfer device. The picker arm can swing in a vertical arc to ac... | 11/28/1995 |
| 5423018 | Queue time reduction in a data storage hierarchy using volume mount rate The utilization of a level of a data storage hierarchy is monitored and the data in such level is manipulated in response thereto. In a data storage hierarchy including an automated storage library, the utilization is a mount rate relative to the maximum ... | 06/06/1995 |
| 5420727 | Error controlled volume serial identification for varied track density systems A tape drive subsystem discloses that variable length symbols can be used to reliably identify data stored on the tape. Machine controlling procedures are disclosed to encode and decode data for the reliable sensing of the serial number of a media, especi... | 05/30/1995 |
| 5395199 | Automated storage library with horizontal array of storage cells The invention is an automated storage library including one or more robotic accessors which move upon the surface of a horizontal plane including the openings to storage cells. The accessors are wireless, remotely controlled vehicles. The vehicles employ ... | 03/07/1995 |
| 5394069 | Mechanical brake hold circuit for an electric motor An automated tape library employing a motorized robotic picker wherein the electric motor driving the robotic picker is equipped with two brakes that act simultaneously. The first is a mechanical brake which uses a spring to push a brake pad against the r... | 02/28/1995 |
| 5388260 | Transparent library management An automated storage library for which the management thereof is transparent to a requester is disclosed. The library provides for all of its own internal management. To access a file in the library, a requester need only specify the volume on which the f... | 02/07/1995 |
| 5377121 | Automated storage library having inventory at picker level An optical disk having its disk inventory at the picker level is disclosed. The library includes two library controllers and four pickers. Each library controller maintains a list of the storage media in the entire library, but has no disk location invent... | 12/27/1994 |
| 5358325 | Robotic system A robotic system has a transfer bay through which objects may be exchanged with a robot. An internal door allows the robot to access the transfer bay and an external door allows access to the transfer bay from the exterior. The external door can only be o... | 10/25/1994 |
| 5327055 | Mechanical brake hold circuit for an electric motor An automated tape library employing a motorized robotic picker wherein the electric motor driving the robotic picker is equipped with two brakes that act simultaneously. The first is a mechanical brake which uses a spring to push a fixed brake pad against... | 07/05/1994 |
| 5322974 | Interleaved fine line cables The invention is an interleaved electrical cable and a method of manufacture therefor. The cable is manufactured by interleaving the electrical traces of two cable subassemblies. Two cable subassemblies are manufactured and then bonded together with the t... | 06/21/1994 |
| 5317728 | Storage management of a first file system using a second file system containing surrogate files and catalog management information A first file system to assist in the storage management of a second file system not able to store its own management classes and management attributes. A repository file space in the first file system is used to accomplish the storage of some or all of th... | 05/31/1994 |
| 5316235 | Tape cartridge with mount plate A tape cartridge having a solid metal mount plate including a plurality of surfaces thereon simultaneously machined to the same plane. Tape reels and tape guides are affixed to the mount plate, thereby ensuring precise alignment to each other. A portion o... | 05/31/1994 |
| 5299756 | Foil wrapped flexible web guide A hydrodynamic tape guide includes a thin metal foil attached to a substrate by a pin inserted into a groove in the substrate. The groove is of a geometry including a first region of a relatively small width and at a relatively shallow depth and a second ... | 04/05/1994 |
| 5297755 | Tape cartridge tape path A tape cartridge having a high performance tape path therein. The tape cartridge includes one or more gas bearing tape guides and/or one or more recesses in an edge of a gas/tape bearing surface. The gas bearing assemblies include a plenum having a metal ... | 03/29/1994 |
| 5297754 | Tape reel with brake and dust shield A tape reel brake which is mounted in a well in the top of a tape reel hub. The well is inside the tape bearing surface of the hub. The brake is mounted to be compliantly biased away from the base of the well. The hub is seated against a first inside surf... | 03/29/1994 |
| 5296993 | Magnetic head with magnetic substrate and an enhanced poletip thereon An interleaved bi-directional magnetic tape head for contact recording can have a poletip enhanced by providing a thin film of a soft magnetic material deposited onto a magnetic ferrite substrate. The second pole piece is a thin film of the soft magnetic ... | 03/22/1994 |
| 5294072 | Tape cartridge door with pseudo-head for maintaining tape tension A tape cartridge access door includes a body having two flanges and a pseudo-head therebetween. In the open position, the access door permits a tape head to be mated with the tape in the cartridge. In the closed position, the body and flanges close openin... | 03/15/1994 |
| 5289589 | Automated storage library having redundant SCSI bus system An optical disk library having a redundant SCSI bus system which utilizes double-sided, multi-ported switches for connecting each of two library controllers to all library pickers and some or all of the optical disk drives in the library is disclosed. The... | 02/22/1994 |
| 5289331 | Constrained pivot guide post The invention is a constrained pivot compound radius tape post guide. The post is mounted on an axle which allows it to pivot when the tape changes direction. The pivoting action serves to peel away all tape which has been in stationary contact with the p... | 02/22/1994 |
| 5282105 | Compound radius guide post The invention is a tape guiding post including a tape engaging surface having a longitudinal contour with a compound radius of curvature. In the preferred embodiment, the longitudinal contour has a smoothly varying radius of curvature. The outer portions ... | 01/25/1994 |
| 5251844 | Gimbaled compliant guide for tape drivers A gimbaled compliant guide for tape drives includes two plates mounted adjacent opposite edges of an arcuate tape bearing surface. The plates are pivotably mounted to accommodate variances in the tape path resulting from tape path tolerances and tape dist... | 10/12/1993 |
| 5239650 | Preemptive demount in an automated storage library A method for selecting data storage media for demount in an automated storage library, and an automated storage library and program product therefor are disclosed. Preemptive demount of storage media is permitted when all peripheral storage devices in the... | 08/24/1993 |
| 5239649 | Channel path load balancing, through selection of storage volumes to be processed, for long running applications A system for balancing the loads on channel paths in a digital computer during long running applications is disclosed. Only the load associated with relatively long running applications is monitored. For each volume of data eligible for processing, the se... | 08/24/1993 |
| 5239647 | Data storage hierarchy with shared storage level A data storage hierarchy which inherently allows for a level 1 storage file to be uniquely identified across an entire network is disclosed. A directory naming convention is employed which includes an internal identifier and a name for each subdivision of... | 08/24/1993 |
| 5235574 | Optical disk drive relative position sensor An optical disk drive is disclosed in which sensing the position of a tilting prism driven by a fine tracking actuator uses the optical beam prior to its interaction with an optical disk. The optical beam emitted by a laser is redirected by the tilting pr... | 08/10/1993 |
| 5231625 | Optical disk drive wherein a preset reading laser power is used to generate a desired white laser power This invention relates to a technique for obtaining a desired laser power. In write mode the laser power in an optical disk drive is determined in accordance with a DAC value which controls a power supply for the laser, but the correlation between the las... | 07/27/1993 |
| 5218585 | Phase shifting feedback control in an optical disk drive The invention is an optical disk drive which controls mechanical feedback to a focus servo actuator by shifting the phase of the feedback along its path back to the servo an additional 180 degrees to eliminate the degradation of the phase margin and preve... | 06/08/1993 |
| 5208714 | Magnetic hybrid interleaved head with closure supporting islands An interleaved head for reading and writing data transitions onto a magnetic tape. A magnetic recording system for the bi-directional transportation of the tape media across the interleaved head. A controller controls the tape drive in a reel-to-reel form... | 05/04/1993 |
| 5200936 | Magneto-optic method and apparatus for recording and retrieving high-density digital data A magneto-optic method and apparatus for recording digital data employs selective heating beyond the Curie or compensation temperature Tc of the record material in the presence of an external magnetic field for recording information by rotating... | 04/06/1993 |
| 5199084 | Apparatus and method for locating characters on a label Locating and recognizing characters on a machine produced label, for example, is accomplished faster and more accurately by searching for first and second identifiable objects within first and second search windows, respectively. The first and second sear... | 03/30/1993 |
| 5199017 | Optical disk drive and method for counting the number of tracks on an optical disk The invention is a positive peak level comparator for generating a positive peak pulse when a TES (Tracking Error Signal) is higher than a predetermined positive level, a negative peak level comparator for generating a negative peak pulse when the TES is ... | 03/30/1993 |
| 5197055 | Idle demount in an automated storage library A method for selecting additional data storage media for demount in an idle automated storage library, and an automated storage library and program product therefor are disclosed. The method permits the advanced demount of storage media when one or more o... | 03/23/1993 |
| 5179711 | Minimum identical consecutive run length data units compression method by searching consecutive data pair comparison results stored in a string A method of detecting certain runs of data, such as identical consecutive runs of data, is disclosed. The logical operation exclusive OR (XOR) is performed on each pair of adjacent bytes in a source string of data bytes in a single machine instruction, re... | 01/12/1993 |
| 5144611 | Optical disk drive cleaner cartridge The invention is a cleaning cartridge which includes a housing and a tube for injecting a compressed gas therethrough and into specific areas of an optical disk drive. The tube is removably connectable at one end to a compressed gas supply, and is aimed a... | 09/01/1992 |
