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公开(公告)号：EP0167093A3
公开(公告)日：1988-03-23
申请号：EP85107871
申请日：1985-06-25
申请人： VERBATIM CORPORATION
IPC分类号： G11B05/016 , G06F03/06 , G11B20/12
CPC分类号： G06F3/0607 , G06F3/064 , G06F3/0676
摘要： A multiple system data storage disk adapted for use with more than one type of computer. The disk is specially formatted to include software for each computer. The disk includes four discrete recognition headers, one for each target computer, placed at locations on the disk where each computer expects to begin its data loading operation. Each header further includes software directing the computer to step out to a discrete group of data tracks located elsewhere on the disk. Each data track group contains an identical program, written in each target computer's language. The disk is suited to video games for multiple computers. An alternative embodiment of the disk includes a header or headers containing a magnetic signature for copy protection. A disk can be produced with twenty-four such headers, one for each type of computer on the market, which can be mass produced to provide low-cost copy protection for all machines.
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公开(公告)号：EP0121590A3
公开(公告)日：1985-09-18
申请号：EP83108525
申请日：1983-08-30
申请人： VERBATIM CORPORATION
发明人： Bond, Charles R.
IPC分类号： G11B05/58 , G11B05/56 , G11B19/28 , G11B05/016 , G11B27/36
CPC分类号： G11B27/36 , G11B5/5543
摘要： An alignment testing device comprising a magnetic media with data tracks in nonstandard locations with bidirectionally progressive degrees of misalignment for testing the alignment of the transducer head in a magnetic storage device such as a floppy disk drive. The alignment testing device allows the user to determine the boundaries of track alignments that the transducer head can read, and thereby determine any discrepency between the heads actual alignment and correct alignment.
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公开(公告)号：EP0210529A3
公开(公告)日：1988-08-10
申请号：EP86109659
申请日：1986-07-14
IPC分类号： G11B05/016 , G11B20/10 , G06F03/06
CPC分类号： G06F3/0601 , G06F2003/0692 , G11B5/016 , G11B20/10
摘要： floppy disk drive interface circuit of the invention has a counter/selector (21) for counting the pulse width of a window signal supplied from a voltage frequency oscillator (2). When a window pulse having a pulse width longer or shorter than a preset pulse width is input, counter/selector (21) supplies a disable signal to AND gate 22. AND gate 22 blocks window signal 12 from VF02 being supplied to FDC 3.
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公开(公告)号：EP0203592A3
公开(公告)日：1988-02-24
申请号：EP86107265
申请日：1986-05-28
申请人： SONY CORPORATION
IPC分类号： G11B27/30 , G11B05/016 , G11B20/12 , H04N05/781
CPC分类号： G11B20/1254 , G11B27/3027 , H04L7/08 , H04N5/935
摘要： A synchronizing signal detecting circuit for a digital data reproducing apparatus having a reproducing device (12) connected to a magnetic head (11) for deriving digital signals, a phase locked loop circuit (16) connected to the reproducing device for generating a clock signal based on the derived digital signals, a sync. (synchronizing) counter (17) for generating sync. timings by counting the clock signal, a plurality of sync. pattern detecting circuits (13, 14) connected to the reproducing device (12) for detecting sync. patterns included in the digital signals, and a logic circuit (15) connected to the plurality of sync. pattern detecting circuits (13, 14) for supplying an initialize pulse to the sync. counter (17) upon detecting successive sync. patterns in the digital signals at the plurality of sync. pattern detecting circuits.
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公开(公告)号：EP0162689A3
公开(公告)日：1987-05-27
申请号：EP85303532
申请日：1985-05-20
申请人： SONY CORPORATION
IPC分类号： G11B20/18 , G11B20/10 , G11B05/016 , H04N05/781
CPC分类号： G11B5/016 , G11B20/1251 , G11B20/1809 , G11B23/0021 , G11B27/36 , G11B2020/10537 , G11B2220/2508 , H04N9/7921 , H04N9/83
摘要： A magnetic disc reproducing apparatus, for reproducing information signals from one of a plurality of tracks of a magnetic disc, includes a transducer (21) positioned in transducing relation with the plurality of tracks for reading out the information signals of the tracks, a checking circuit (45, 52) connected to the transducer (21) for checking a portion of the information signals, and an identifying circuit (53) connected to the checking circuit (45, 52) for identifying characteristics of the information signals being reproduced.
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公开(公告)号：EP0208054A3
公开(公告)日：1988-01-07
申请号：EP86103210
申请日：1986-03-11
IPC分类号： G11B05/596 , G11B05/016
CPC分类号： G11B5/59627
摘要： Servo information is located within one of the data sectors of a record disk and is in the form of a pattern of radially spaced-apart segments (51, 52, 53, 61, 62, 63) , each segment overlapping a number of data tracks and comprising magnetic transitions which increase in frequency with distance from the centre of the disk to provide a digital head position error signal (PES). A similar segment (31, 32, 33) is located in each of the other data sectors around the perimeter of the disk to provide track profile information so that a head positioning system can compensate for disk runout and distortion. The disk drive can include means for eliminating the effect of the amplitude of the readback signal from the servo and profile segments on the head positioning system, thus ensuring a reliable PES at all radial locations on the disk and allowing interchangeability of disks among disk drives.
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公开(公告)号：EP0106661A3
公开(公告)日：1985-08-07
申请号：EP83306177
申请日：1983-10-12
申请人： DYSAN CORPORATION
IPC分类号： G11B05/016 , G11B05/596 , G11B05/55 , G11B23/36 , G11B27/10
CPC分类号： G11B5/016 , G11B5/59627 , G11B23/36 , G11B27/32
摘要： A method and apparatus for checking performance and alignment of a disk drive designed for use with a floppy disk having a motor (16) driven linear positioning mechanism (14,21) for locating the read/write transducer (22) over the disk circular tracks. A digitally prerecorded diagnostic disk (50) has a series of precisely located special diagnostic tracks providing reference data for various alignment and response characteristics, both mechanical and electronic. A first group of tracks (track 0, 6, 32, 41, 71, 79) have sector ID blocks followed by progressively offset data blocks interspersed therein, with the range of the offset greater than the width of the track for which the disk drive is designed, which guarantees a read failure upon reading any track. These tracks are distributed radially across the surface of the disk at positions corresponding to each rotational phase position of the transducer stepper motor. A pair of indexed timing tracks (track 0, 79) having a fixed number of byte transitions permits testing of both the alignment of the index transducer and skew of the linear positioning device. A pair of special timing tracks affords reference data for head compliance measurement. A plurality of alternate offset tracks (track 44, 47, 50) located centrally of the recording band provides reference data for measuring the eccentricity of the drive spindle.
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公开(公告)号：EP0052477A3
公开(公告)日：1983-01-26
申请号：EP81305358
申请日：1981-11-11
发明人： Tronzano, Sergio , Vignal, Carlo
IPC分类号： G11B05/54 , G11B05/016
CPC分类号： G11B17/041 , G11B5/54
摘要： An apparatus for recording flexible magnetic disks contained in envelopes comprises a mandrel engageable with a central zone of the disk to rotate the disk within the envelope, and a carriage 41 which is movable radially relative to the disk and on which there is mounted a pair of magnetic heads which oppose each other and make contact with the magnetisable surfaces of the disk. The carriage 41 is moved on guides 48 by a stepping motor shaft 44 by way of a pair of flexible strips 50, 51 which are partly wound about a hub 59 on the shaft 44. The ends of the strips are retained by longitudinal pins 70 loosely fitted into an eccentric bore in the hub 59 without the aid of screws. Pegs 71 on the pins 70 pass through holes in the ends of the strips 50 and 51 and are arrested against the motor shaft 44. A presser pad, which presses the envelope containing the disk against a reference surface of the apparatus, is lowered by an electromagnet which also causes the upper head to lower. A lost-motion form of coupling enables the pad and upper head to carry out independently adjustable travel strokes, so minimising any recoil.
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公开(公告)号：EP0010172A3
公开(公告)日：1980-05-14
申请号：EP79103512
申请日：1979-09-19
IPC分类号： G11B05/016 , G11B17/02
CPC分类号： G11B17/32
摘要： A magnetic disk file machine has a pair of opposed transducers, one transducer 150 of which is movable to engage a magnetic disk rotatably disposed in a magnetic diskette assembly in the machine against the other, a pressure plate opposed to a platen portion for holding the disk in a proper data transferring plane, and a manually operable knob 242 mechanically connected with the movable transducer and with the pressure plate for moving these parts between original positions, which are widely separated from the opposed parts to allow positioning of a magnetic diskette in the machine, and intermediate positions in which the spacing is less. The machine includes a solenoid mechanically connected with the movable transducer and with the pressure plate for moving these parts from their intermediate positions to final positions in which the movable transducer engages the disk and in which the pressure plate grips the diskette and holds the disk in a proper data transferring plane. The mechanical connections from the knob to the pressure plate and to the movable transducer include an oscillatable shaft 240 connected with the knob and having an eccentric portion 241 effective for moving these parts between original and intermediate positions. The solenoid is positioned on the other side of the machine to the oscillatable shaft, and a flexible cable 270 connected the solenoid with mechanism on the shaft side of the machine for moving the pressure plate and movable transducer between intermediate and final positions.
摘要翻译： 磁盘文件机具有一对相对的换能器，其一个换能器150可移动以将可旋转地设置在机器中的磁盘组件中的磁盘相对于另一个接合;与压板部分相对的压板，用于保持盘 在适当的数据传输平面中，以及可手动操作的旋钮242，其与可移动换能器机械连接，并具有用于将这些部件移动到原始位置之间的压力板，原始位置与相对部分广泛地分离，以允许将磁盘定位在机器 ，间隔较小的中间位置。 该机器包括与可移动换能器机械连接的螺线管和用于将这些部件从其中间位置移动到可移动传感器接合盘的最终位置的压板，压力盘夹在盘上并将盘保持在盘中 正确的数据传输平面。 从旋钮到压板和可移动换能器的机械连接包括与旋钮连接的可摆动轴240，并且具有有效地用于在原始位置和中间位置之间移动这些部件的偏心部分241。 螺线管位于机器的另一侧到可摆动轴，并且柔性电缆270将电磁线圈连接在机器的轴侧上的机构，用于在中间位置和最终位置之间移动压板和可移动换能器。
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