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公开(公告)号：US3911429A
公开(公告)日：1975-10-07
申请号：US45860974
申请日：1974-04-08
Applicant: IBM
Inventor： VINAL ALBERT WATSON
CPC classification number: H03M11/02 , G06F3/0202 , H03K17/97 , H03K17/972 , H03K2017/9706
Abstract: A magnetically actuated, self-scanned, self-energized bounceless, non-contacting, non-teasible, tactile feel N-key roll keyboard mechanism is disclosed in which an improved key actuator and sensor are utilized is disclosed. The actuator features the creation of a complete 180* tangential flux reversal across the area of the sensor which, in turn, produces the maximum flux change and the best sensing conditions. The sensor incorporated in the keyboard utilizes a switchable, coupled magnetic film and one or more sensing coils in association therewith to produce electrical signals in response to the flux reversal.
Abstract translation: 公开了一种磁力驱动的，自扫描的，自动的无弹力的，非接触的，不可触摸的，触觉的N键滚键盘机构，其中使用了改进的键致动器和传感器。 致动器的特征是在传感器的区域上产生完整的180°切向磁通反向，这反过来又产生最大的磁通变化和最佳感测条件。 结合在键盘中的传感器利用可切换的耦合磁膜和与其相关联的一个或多个感测线圈，以响应于磁通反转而产生电信号。
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公开(公告)号：DE3586676T2
公开(公告)日：1993-04-01
申请号：DE3586676
申请日：1985-10-15
Applicant: IBM
Inventor： VINAL ALBERT WATSON
Abstract: Servoing is accomplished utilizing the same read head and the same data track by utilizing a differentially sensitive magnetic sensor. The sensor is utilized as the data read back head sensitive element but separate outputs from the differential sensor are supplied to separate track following amplifiers isolated from the data signal amplifier. The separate amplifiers for the servo information utilize the inherent differential sensitivity of the sensor. As one-half or the other of the differentially sensitive sensor drifts over the edge of a recorded data track, its signal output level will follow. This differential between the left and right halves of the sensor in the form of a change in signal level at the output can be amplified, referenced to common ground for high common mode noise rejection, and a differential signal derived from the difference between the left and right halves of the sensor. The differential is proportional to the distance off track that the sensor has wandered provided that at least a portion of the sensor remains over the track. A servoing system utilizing the differential output between the left and right and driven by the magnitude of the difference between left and right half signal components is utilized to force the head positioning system back in the appropriate direction to center the head over the data channel.
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公开(公告)号：DE3465832D1
公开(公告)日：1987-10-08
申请号：DE3465832
申请日：1984-05-21
Applicant: IBM
Inventor： VINAL ALBERT WATSON
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Patent Agency Ranking
公开(公告)号：CH597693A5
公开(公告)日：1978-04-14
申请号：CH459376
申请日：1976-04-12
Applicant: IBM
Inventor： VINAL ALBERT WATSON
Abstract: A semi-conductive magnetic flux sensor is disclosed in which semi-conductive material having a resistance on the order of at least 500 ohms per square is placed in a lateral electric field of at least 500 volts per centimeter. A signal probe or contact located between the two lateral field contacts produces an output voltage when the sensor is subjected to magnetic fields having at least some component perpendicular to the plane of the three contacts. The device is highly sensitive and yields approximately one order of magnitude higher signal output than conventional Hall type semi-conductive magnetic sensors.
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公开(公告)号：DE1280318B
公开(公告)日：1968-10-17
申请号：DEJ0024149
申请日：1963-07-27
Applicant: IBM
Inventor： VINAL ALBERT WATSON
IPC: G11C7/00
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公开(公告)号：AT55195T
公开(公告)日：1990-08-15
申请号：AT84114664
申请日：1984-12-04
Applicant: IBM
Inventor： VINAL ALBERT WATSON
Abstract: 57 An improved read-write head for twin track vertical magnetic recording is described. Inductive, solid state, or magneto-resistive sensors may all be employed with the new read-write head structure. A preferred embodiment utilizing a magneto-resistive coupled film sensor for read back which saturates to allow writing is disclosed.
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公开(公告)号：DE3376456D1
公开(公告)日：1988-06-01
申请号：DE3376456
申请日：1983-05-02
Applicant: IBM
Inventor： VINAL ALBERT WATSON
Abstract: A unique dual track recording technique is described in which complementarily magnetically poled regions are simultaneously written in adjacent positions in two parallel tracks. Multi-track recording of magnetic data transitions in oppositely poled matched zones in the separate tracks provides a high flux coupling to a magnetic sensor. The sensor is exposed to the combined flux from both tracks. This also provides a high degree of data redundancy in the event of small physical anomalies in the magnetic medium or writing anomalies in one track or the other. Because a large magnetic field may be coupled, a magnetic sensor may be positioned at some substantial distance above the magnetic medium on which the data is recorded. This overcomes a significant problem in data reading and writing. The present limits of proximity to the magnetic medium of the sensor head or write head have been reached and still higher data density is desired. A high data density recording method is thus described which creates a significant field coupled to a sensor position at a substantial distance above the magnetic storage medium. Reading and writing data at densities upwards of 50,000 flux changes per inch and with channel densities of 4000 per inch may be achieved.
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