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公开(公告)号：AT168810T
公开(公告)日：1998-08-15
申请号：AT93308911
申请日：1993-11-08
Applicant: IBM
Inventor： BELSER KARL ARNOLD , HURST JERRY ELDEN , MADISON MICHAEL RICHARD
IPC: G11B7/00 , G11B7/0045 , G11B11/105 , G11B20/14 , G11B7/125 , G11B11/10
Abstract: An optical data storage system records pulse width modulated data as a series of contiguous and overlapping circular marks. A minimum number of circular marks are used to record the desired run length. Circular marks which overlap by greater or equal to one half the diameter of the circular mark are recorded using two different laser power levels. The result is that thermal buildup in the medium is kept to a minimum and the edge transitions are accurately positioned.
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公开(公告)号：DE69319845T2
公开(公告)日：1999-03-25
申请号：DE69319845
申请日：1993-11-08
Applicant: IBM
Inventor： BELSER KARL ARNOLD , HURST JERRY ELDEN , MADISON MICHAEL RICHARD
IPC: G11B7/00 , G11B7/0045 , G11B11/105 , G11B20/14 , G11B7/125 , G11B11/10
Abstract: An optical data storage system records pulse width modulated data as a series of contiguous and overlapping circular marks. A minimum number of circular marks are used to record the desired run length. Circular marks which overlap by greater or equal to one half the diameter of the circular mark are recorded using two different laser power levels. The result is that thermal buildup in the medium is kept to a minimum and the edge transitions are accurately positioned.
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公开(公告)号：DE69313538D1
公开(公告)日：1997-10-09
申请号：DE69313538
申请日：1993-06-29
Applicant: PHILIPS ELECTRONICS NV , IBM
Inventor： BAKX JOHANNES LEOPOLDUS , WEIJENBERGH PAULUS GIJSBERTUS , BELSER KARL ARNOLD , JAQUETTE GLEN ALAN , KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , MEANS RODNEY JEROME
Abstract: A record carrier having essentially circular tracks concentrically located around a point of rotation. The record carrier is divided into circular zones each having m tracks, where m is an integer. Each track within a zone is subdivided into n sectors, where n is an integer which is constant per zone and which increases as the zone is more remote from the point of rotation. Each sector including a header portion and a data portion. The header portions in the radial direction in each zone are in line. In each zone the condition of m*n=j*k is satisfied, where is j an integer greater than or equal to 2 and is constant for each zone, and k is an integer.
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公开(公告)号：DE2261121A1
公开(公告)日：1973-07-05
申请号：DE2261121
申请日：1972-12-14
Applicant: IBM
Inventor： BELSER KARL ARNOLD
Abstract: 1340840 Selective printing INTERNATIONAL BUSINESS MACHINES CORP 1 Dec 1972 [23 Dec 1971] 55486/72 Heading B6F Hammer impression.-A plurality of slidably mounted hammers 53, each with a head 55 capable of printing in more than one character position, are operated on by an equal plurality of spring loaded actuators (99, Fig. 3) slidably mounted in a plurality of bores 91 in a one piece magnetic block 61. The block 61 forms part of an electromagnet comprising a coil (27, Fig. 3), and core members (39, 41 and 45). The coil is continuously energized to attract the armature portions 51 of the plurality of hammers, into contact with a plurality of polepieces 63 formed on the upper edge the block 61. Each polepiece 63 is provided with a selectively energizable backing coil 29 which cancels the magnetic attraction created by the main coil (27). By rotating a plurality of set screws 97, the forward flight time of each hammer may be adjusted.
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公开(公告)号：DE69319845D1
公开(公告)日：1998-08-27
申请号：DE69319845
申请日：1993-11-08
Applicant: IBM
Inventor： BELSER KARL ARNOLD , HURST JERRY ELDEN , MADISON MICHAEL RICHARD
IPC: G11B7/00 , G11B7/0045 , G11B11/105 , G11B20/14 , G11B7/125 , G11B11/10
Abstract: An optical data storage system records pulse width modulated data as a series of contiguous and overlapping circular marks. A minimum number of circular marks are used to record the desired run length. Circular marks which overlap by greater or equal to one half the diameter of the circular mark are recorded using two different laser power levels. The result is that thermal buildup in the medium is kept to a minimum and the edge transitions are accurately positioned.
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Patent Agency Ranking
公开(公告)号：DE69024866T2
公开(公告)日：1996-11-14
申请号：DE69024866
申请日：1990-07-10
Applicant: IBM
Inventor： BELSER KARL ARNOLD , DOUNN PAUL JOSEPH , HENDERSON IAN EDWARD , KADLEC RONALD JAMES , ROBERTS SPENCER DONALD
Abstract: A track-seeking system for an optical disk using a velocity control loop with partially-digitized velocity measurement is described in which the sample period of the position error signal is varied in accordance with a velocity profile and a gain of the digital circuits is adjusted, also in accordance with the velocity profile, for providing optimum operation of the digitized portion of the velocity signal generator. In another aspect of the velocity-signal generation, the same digital circuit generates a velocity reference signal and a velocity error signal from a common desired velocity profile set of values.
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公开(公告)号：DE68921236T2
公开(公告)日：1995-08-10
申请号：DE68921236
申请日：1989-04-18
Applicant: IBM
Inventor： BELSER KARL ARNOLD , MAKANSI TAREK , SANDERS IAN LEWIS
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公开(公告)号：DE69111100D1
公开(公告)日：1995-08-17
申请号：DE69111100
申请日：1991-03-01
Applicant: IBM
Inventor： BELSER KARL ARNOLD , WHITEFIELD RODNEY JOE
Abstract: Storage capacity of a magnetic recording medium is increased by providing a nonconductive layer 11 over a magnetic layer 12 on which magnetic data 17 is writable in a series of recording tracks 17, and applying a pattern of electrostatic charges 21 to the nonconductive layer above at least one of the recording tracks 26 to write track-position-denoting servo information in overlying relation to magnetic data. The pattern may be applied by electrostatic charges selectively of negative or positive polarity that are imprinted while the medium is in a mold or advanced over an electro-photographic charge transfer drum, for thereby preprinting the pattern as a step in fabrication of the medium.
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