Abstract:
A method and system are disclosed for improved edge detection on tapes. By use of a nominal tape having a 100% output, a write head writes with a given write current onto the nominal tape and the output level is read with a read head during a calibration procedure in order to determine a reference level for the 100% nominal tape. Thereafter, when an actual tape is being used, by use of the same write current, a signal is written on the actual tape and is subsequently read to create a read output. That read output is compared to the reference level output derived during the calibration to create a correction factor. The correction factor is then employed to correct a trigger point utilized during a subsequent tape edge determination.
Abstract:
In a tape cartridge of the type used to store data on a magnetic tape in a high-speed data storage and retrieval system, the tape must be maintained at a proper tension within the cartridge so as to maintain the tape taut against the write/read head. Slackness in the tape occurs after a repeated number of changes in the tape transport direction or start/stop events, because the tension experienced by the tape is not the same in both transport directions. A method and apparatus for maintaining tape tension are disclosed wherein a selected tape characteristic is monitored, the characteristic changing as the tape tension changes. If the monitored characteristic exceeds a predetermined value, or after the passage of a selected amount of time, when the next reversal of tape transport direction occurs, the tape is moved a selected distance longer than necessary to effect the reversal so that when a desired data location on the tape reaches the location of the write/read head, the tape will again be at the proper tension.
Abstract:
A method for determining the servo track pair position and longitudinal tape position for a tape using dedicated servo format, said tape including at least one set of data tracks and dedicated servo tracks, wherein adjacent servo tracks are defined by longitudinal lines through the edges of erased or non-recorded tape portions, is characterized in that information about servo track pair numbers and/or servo sample numbers is recorded into said tape portions and is decoded and read back together with signals from said servo track, wherein the information is recorded in a digital manner by using a digital block format of data blocks requiring preferentially less bytes per block than a data block provided on said data tracks. If information about longitudinal tape position is not required, an analog manner using a fixed set of predetermined frequencies.
Abstract:
A housing of a tape drive is adapted for sideways loading of a cartridge. The cartridge is loaded such that three reference points defining a fixed plane within the housing engages the cartridge in a fixed orientation with respect to a head within the drive. The cartridge is canted after the cartridge is engaged at a first one of the three reference points so as to fixedly engage the cartridge at each of the three reference points.
Abstract:
A magnetic tape drive for magnetic tape housed within a cartridge, including a rectangular access through which the cartridge is inserted into the drive and a wiping member operatively positioned at an edge of the access such that the cartridge is contacted during insertion into the drive, the wiping member being so constructed and coupled to electrical ground that electrostatic charge on the cartridge is bled to electrical ground.
Abstract:
A magnetic head which contacts the magnetic tape (11) comprises a ferromagnetic body (12). A recess (26) is provided in this ferromagnetic body (12). A ferromagnetic core (9) has pole tips (9a,9b) which are located in the recess and which are arranged for contact with the magnetic tape. A non-magnetic material (18,20,21,22) is arranged along each side of the magnetic core pole tips in the recess. Relative hardnesses of the ferromagnetic body, ferromagnetic core pole tips, and non-magnetic material are chosen so that as the tape (11) wears away on contact surfaces of the magnetic core pole tips, non-magnetic material, and ferromagnetic body, the core pole tips (9a,9b) protrude relative to adjacent portions of the ferromagnetic body and the non-magnetic material so that the tape rides on the protruding pole tips of the core. A radius of curvature at the contact surface of the magnetic core pole tips prior to wearing of the pole tips is chosen such that it is smaller than a natural radius of bending of the tape.
Abstract:
A data storage device is disclosed having associated therewith a removable storage medium. The data storage device has a main control unit with a microprocessor. The system is designed such that an internal control program for control of the media is stored directly on the media itself. By use of a boot program which can be stored in the microprocessor or separately from the microprocessor, the control program is read off of the media by the microprocessor and is stored in a main control program storage within the data storage device. The main control program storage is an erasible storage like an EEPROM, RAM, or flash memory.
Abstract:
A mouse system is disclosed for data entry and control and wherein a rolling force of the ball is made adjustable to suit an operator's preference. A friction pad (24) or a magnetic force may be applied to the ball (22) to change and adjust the ball rolling force. Alternatively, a free roller in contact with the ball has its rotational force adjustable by friction or magnetic forces acting on the free roller or its axle. The mouse system disclosed is designed ergonomically to ease operator fatigue and increase an operator's efficiency.
Abstract:
Die Trägeranordnung soll es ermöglichen, ein Sichtgerät (3) stufenlos in eine Vielzahl von Stellungen zu bringen. Die Trägeranordnung enthält einen horizontalen Tragarm (4) und einen vertikalen Stützarm (6), der mittels einer Halterung (7) an einer Tischplatte (2) oder einer Wand befestigt wird. Der horizontale Tragarm (4) teilt sich in zwei Teilarme auf, zwischen denen ein das Sichtgerät (3) tragender Gleitkörper (5) in Längsrichtung des Tragarms (4) verschiebbar ist. Der Stützarm (6) ist in der Halterung (7) drehbar und in vertikaler Richtung verschiebbar angeordnet und stützt sich durch eine Feder an dem unteren Ende der Halterung (7) ab. Auf dem Gleitkörper (5) ist ein Trägerteil (11) drehbar angeordnet, an dem das Sichtgerät (3) neigbar befestigt ist. Unterhalb des Sichtgeräts (3) in ein Handgriff (12) zum Einstellen verschiedener Positionen angeordnet. Dieser Handgriff (12) kann auch eine Tastatur in einer Ruhestellung und/oder Bereitschaftsstellung aufnehmen. Die Trägeranordnung eignet sich insbesondere für Arbeitsplätze mit Sichtgeräten.