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1. 发明授权

US4752837A Data synchronizer for use with a variable rate input source 失效
标题翻译：用于可变速率输入源的数据同步器
公开(公告)号：US4752837A
公开(公告)日：1988-06-21
申请号：US799278
申请日：1985-11-19
申请人： Robert S. DeLand, Jr.
发明人： Robert S. DeLand, Jr.
IPC分类号： G11B20/14 , H03L7/099 , G11B5/09 , H03L7/00 , H03L7/24
CPC分类号： H03L7/0992 , G11B20/1403
摘要： A digital system is disclosed for synchronizing data in a variable-rate pulse stream, as by the intervals of a magnetic recording medium. Functionally, an estimate is made of the size of a repeatedly recorded interval and the estimate is registered. In subsequent operation, the estimate is revised whenever it is found to differ from the recorded interval, based on an allowable tolerance. The revision is by a fixed percentage of the registered estimate. An oscillator drives a down counter which is variably pre-set in accordance with the prior timing history of the pulse stream (including a substantial number of pulses). Accordingly, each cycle of the down counter provides a variable sub-interval, a predetermined number of which are counted to provide each variable synchronizing interval. Comparisons of the synchronizing interval and the pulse stream serve to adjust pre-setting of the down counter to a current value. An analog form of the system is suggested and techniques are disclosed for use of the system with various pulse code formats.
摘要翻译：公开了一种用于以可变速率脉冲流的数据同步的数字系统，如通过磁记录介质的间隔。在功能上，对重复记录的间隔的大小进行估计，并且估计被注册。在随后的操作中，根据允许的公差，每当发现与记录的间隔不同时，修改估计值。修订是按注册估计的固定百分比。振荡器驱动向下计数器，其根据脉冲流的先前定时历史（包括大量脉冲）可变地预设。因此，向下计数器的每个周期提供可变子间隔，其中预定数量被计数以提供每个可变同步间隔。同步间隔和脉冲流的比较用于将向下计数器的预设置调整为当前值。提出了系统的模拟形式，并公开了使用具有各种脉冲编码格式的系统的技术。

2. 发明授权

US07478751B2 Method and apparatus for authenticating a magnetic fingerprint signal using a filter capable of isolating a remanent noise related signal component 有权
标题翻译：使用能够隔离残留噪声相关信号分量的滤波器来认证磁性指纹信号的方法和装置
公开(公告)号：US07478751B2
公开(公告)日：2009-01-20
申请号：US11014930
申请日：2004-12-17
申请人： Robert E. Morley, Jr. , Robert S. Deland, Jr. , Emmanuel C. Limtao , Edward J. Richter , Stephen R. Wood
发明人： Robert E. Morley, Jr. , Robert S. Deland, Jr. , Emmanuel C. Limtao , Edward J. Richter , Stephen R. Wood
IPC分类号： G06K7/08
CPC分类号： G06K7/084 , G06Q20/347 , G07D7/04 , G07F7/08 , G07F7/0813 , G07F7/12
摘要： A system for verifying the authenticity of data contained in a magnetic medium using the remanent noise characteristics of the magnetic medium. In one embodiment, the invention includes a sensing unit configured to generate a signal indicative of the magnetic field of the magnetic medium, an analog-to-digital converter (ADC) in communication with the sensing unit and configured to digitize the analog signal, a filter in communication with the ADC configured to enhance the component of the signal associated with the remanent noise characteristic, a data extraction unit, in communication with the ADC and the filter configured to measure at least bit duration and peak location and an authentication extraction unit, in communication with the filter and the data extraction unit configured to extract a set of scaled samples from the output of the filter representative of the remanent noise characteristic.
摘要翻译：一种用于使用磁介质的剩余噪声特性来验证包含在磁介质中的数据的真实性的系统。在一个实施例中，本发明包括被配置为产生指示磁介质的磁场的信号的感测单元，与感测单元通信并被配置为数字化模拟信号的模拟 - 数字转换器（ADC）与被配置为增强与剩余噪声特性相关联的信号的分量的滤波器，与ADC通信的数据提取单元和被配置为测量至少位持续时间和峰值位置的滤波器以及认证提取单元，与所述滤波器和所述数据提取单元通信，所述数据提取单元被配置为从表示所述剩余噪声特性的所述滤波器的输出中提取一组缩放样本。

3. 发明授权

US5829743A Gear-driven card transport device 失效
标题翻译：齿轮驱动卡传输设备
公开(公告)号：US5829743A
公开(公告)日：1998-11-03
申请号：US606644
申请日：1996-02-27
申请人： Robert S. DeLand, Jr. , Lawrence R. Meyers , Richard G. Fisher
发明人： Robert S. DeLand, Jr. , Lawrence R. Meyers , Richard G. Fisher
IPC分类号： B65H5/06
CPC分类号： B65H5/06 , B65H2515/50 , B65H2601/50
摘要： A data-bearing card is transported past a reading, writing or other communication head by at least one drive element connected to an electric motor through a preselected gear train. The mechanism moves the card at speeds corresponding to a preferred range of rates at which data borne by the card is intended to pass the communication head, and does so with a minimum of "jitter". In one particular embodiment, the gear train includes a worm screw driving a worm wheel for rotation with the drive element. In another embodiment, the electric motor is supported on a base oriented substantially parallel to the card being transported, and a shaft carrying the drive element and a first gear of the gear train is supported for rotation by at least one side plate detachably mounted to the base.
摘要翻译：数据承载卡通过至少一个通过预先选择的齿轮系连接到电动机的驱动元件被传送通过读取，写入或其它通信头。该机构以对应于由卡承载的数据旨在通过通信头的速率的优选范围的速度移动卡，并且以最小的“抖动”进行。在一个特定实施例中，齿轮系包括驱动蜗轮以与驱动元件一起旋转的蜗杆螺杆。在另一个实施例中，电动机被支撑在基本上平行于正被输送的卡定向的基座上，并且承载驱动元件的轴和齿轮系的第一齿轮被支撑以通过至少一个可拆卸地安装到基础。

4. 发明授权

US5767495A Reduced-power magnetic transducer system utilizing a magnetoresistive head 失效
标题翻译：使用磁阻头的减磁力传感器系统
公开(公告)号：US5767495A
公开(公告)日：1998-06-16
申请号：US681947
申请日：1996-07-29
申请人： Robert S. DeLand, Jr.
发明人： Robert S. DeLand, Jr.
IPC分类号： G06K7/08 , G11B5/09 , G11B5/39 , G11B17/04 , G06K19/06 , G11B5/127 , G11B25/04
CPC分类号： G11B5/39 , G06K7/084 , G11B17/0408 , G11B5/09
摘要： A reduced-power dynamic magnetic transducer system includes a magnetoresistive read head, a low duty cycle pulse generator to supply power to the head, a signal processor, and a controller. As a data-bearing card is moved adjacent to the magnetoresistive read head, the pulse generator actuates the read head, thereby providing an intermittent signal representative of data recorded on the card. The intermittent signal is processed by the signal processor to reconstruct the original recorded data. The reconstructed data is utilized by the controller in conducting transactions with a user of the system.
摘要翻译：降低功率的动态磁换能器系统包括磁阻读头，向占位头供电的低占空比脉冲发生器，信号处理器和控制器。当数据承载卡移动到磁阻读取头附近时，脉冲发生器启动读取头，从而提供表示记录在卡上的数据的间歇信号。间歇信号由信号处理器处理以重建原始记录数据。重构数据由控制器用于与系统的用户进行交易。

5. 发明授权

US6098881A Magnetic stripe card verification system 失效
标题翻译：磁条卡验证系统
公开(公告)号：US6098881A
公开(公告)日：2000-08-08
申请号：US120816
申请日：1998-07-22
申请人： Robert S. DeLand, Jr. , Thomas C. McGeary
发明人： Robert S. DeLand, Jr. , Thomas C. McGeary
IPC分类号： G11B20/10 , G06K7/08 , G07F7/12 , G06K65/00
CPC分类号： G06K7/087 , G06Q20/347 , G07F7/08 , G07F7/125
摘要： Magnetic stripe documents are identified and authenticated on the basis of repeatable magnetic characteristics of a stripe recorded with digital data. Stripes are sensed to provide an analog signal, only a portion of which is used, specifically, the portion storing leading zeros. Cyclically, the leading zeros are sampled and digitized as a target number of samples using a frequency locked loop. The target number of samples for each zero is then reduced by a selection process that attains a predetermined number of digital samples that represent a magnetized portion of a leading zero, specifically, a space between data transitions. Groups of selected predetermined number of digital samples are then combined to provide a card magnetic characteristic identifier. Documents are verified by correlating reference and recent characteristic identifiers. Specific forms of sensor structures are utilized for the applications involving multitudes of different documents and sensor structures.
摘要翻译：基于用数字数据记录的条带的可重复磁特性来识别和鉴定磁条文档。检测条纹以提供模拟信号，仅使用其中的一部分，具体地说，存储前导零的部分。循环地，前导零被采样并使用频率锁定环数字化为目标数量的采样。然后通过选择处理来减少每个零的样本的目标数量，该选择处理获得表示前导零的磁化部分的预定数量的数字采样，具体地说，数据转换之间的空间。然后组合所选择的预定数量的数字样本以提供卡磁特性标识符。通过关联参考和最近的特征标识符来验证文档。传感器结构的具体形式用于涉及多种不同文档和传感器结构的应用。

6. 发明授权

US07090130B2 Method and apparatus for generating images of magnetic fields in at least two dimensions 有权
公开(公告)号：US07090130B2
公开(公告)日：2006-08-15
申请号：US10268131
申请日：2002-10-09
申请人： Robert S. DeLand, Jr. , Stephen R. Wood
发明人： Robert S. DeLand, Jr. , Stephen R. Wood
IPC分类号： G06K7/08
CPC分类号： G06K7/087
摘要： Apparatus and Methods for imaging magnetic fields and for using images of magnetic fields in the authentication of magnetic stripe cards or documents are disclosed. The systems described provide an increased tolerance for misalignments of magnetic reading heads. One preferred embodiment of the invention includes sensing circuitry for sensing an image of the magnetic field using an array of magnetic reading heads and sampling circuitry connected to the sensing circuitry.

7. 发明授权

US06431445B1 Magnetic stripe card verification system 有权
标题翻译：磁条卡验证系统
公开(公告)号：US06431445B1
公开(公告)日：2002-08-13
申请号：US09549971
申请日：2000-04-14
申请人： Robert S. DeLand, Jr. , Thomas C. McGeary
发明人： Robert S. DeLand, Jr. , Thomas C. McGeary
IPC分类号： G06K708
CPC分类号： G07F7/08 , G06K7/087 , G06Q20/347 , G07F7/0813 , G07F7/086 , G07F7/12 , G07F7/125
摘要： Magnetic stripe documents are identified and authenticated on the basis of repeatable magnetic characteristics of a stripe recorded with digital data. Stripes are sensed to provide an analog signal, only a portion of which is used, specifically, the portion storing a plurality of zeros. Cyclically, the zeros are sampled and digitized as a target number of samples using a frequency locked loop. The target number of samples for each zero is then reduced by a selection process that attains a predetermined number of digital samples that represent a magnetized portion of a zero, specifically, a space between data transitions. Groups of selected predetermined number of digital samples are then combined to provide a card magnetic characteristic identifier. The harmonic content of the characteristic identifier is tested as a measure of the quality of the stripe sensing. A predetermined level of quality conditions verification. Documents are verified by correlating reference and recent characteristic identifiers. Specific forms of sensor structures are utilized for the applications involving multitudes of different documents and sensor structures.
摘要翻译：基于用数字数据记录的条带的可重复磁特性来识别和鉴定磁条文档。感测条纹以提供模拟信号，仅使用其一部分，具体地说，存储多个零的部分。循环地，使用频率锁定环将零采样和数字化为目标数量的采样。然后通过选择处理来减少每个零的目标样本数，该选择处理获得表示零的磁化部分的预定数量的数字样本，具体地说，数据转换之间的空间。然后组合所选择的预定数量的数字样本以提供卡磁特性标识符。测试特征标识符的谐波含量作为条纹检测质量的度量。预定水平的质量条件验证。通过关联参考和最近的特征标识符来验证文档。传感器结构的具体形式用于涉及多种不同文档和传感器结构的应用。

8. 发明授权

US5396369A Degausser for magnetic stripe card transducing system 失效
标题翻译： Degausser用于磁条卡转换系统
公开(公告)号：US5396369A
公开(公告)日：1995-03-07
申请号：US111220
申请日：1993-08-24
申请人： Robert S. Deland, Jr. , Richard P. Manning
发明人： Robert S. Deland, Jr. , Richard P. Manning
IPC分类号： G06K7/08 , G11B5/465 , G11B19/02 , G11B25/04
CPC分类号： G11B19/02 , G06K7/084 , G11B5/465
摘要： A device for degaussing magnetic transducers used with magnetic stripe cards includes a degaussing unit that drives a magnetic transducer with an electrical pulse, or a gradually increasing drive frequency, to eliminate the residual magnetism of the transducer. Logic circuitry controls the device to degauss with little or no additional equipment and avoids damage to the recordings, as on low-coercivity magnetic stripe cards.
摘要翻译：用于对磁条卡使用的磁换能器进行消磁的装置包括消磁单元，该消磁单元用电脉冲或逐渐增加的驱动频率驱动磁换能器，以消除换能器的剩余磁性。逻辑电路控制器件消除少量或不需要额外的设备，并避免损坏记录，如低矫顽力磁条卡。

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