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1. 发明授权

US4157577A Rotatable storage apparatus with digitally responsive circuitry for track selection 失效
标题翻译：具有数字响应电路的旋转存储设备，用于轨道选择
公开(公告)号：US4157577A
公开(公告)日：1979-06-05
申请号：US851089
申请日：1977-11-14
申请人： Townsend H. Porter, Jr. , Robert E. Schopp
发明人： Townsend H. Porter, Jr. , Robert E. Schopp
IPC分类号： G05D3/12 , G11B5/596 , G11B21/10 , G11B5/00 , G11B21/08
CPC分类号： G11B5/59655
摘要： A magnetic disk provided with different digital bytes inside and outside of the center line of a magnetic track on the disk, and transducer and recording mechanism for detecting the passage of the digital bytes across the transducer and recording these bytes as the disk rotates so as to determine the distance the center of the transducer is spaced from the center line of the magnetic track. The recorded digital information is used for stepping a transducer stepping motor a distance corresponding to the stored digital information to move the transducer to have its center in correspondence with the center of the track. In one embodiment, the digital information is stored in a circular reference track adjacent the edge of the disk, and in another embodiment the digital information is stored in spiral tracks extending toward the center of the disk.
摘要翻译：在磁盘上的磁道中心线内部和外部设置有不同数字字节的磁盘，以及用于检测数字字节跨过换能器通过的传感器和记录机构，并且当磁盘旋转时记录这些字节，以便确定换能器的中心距离磁轨的中心线的距离。所记录的数字信息用于对换能器步进电机进行与所存储的数字信息相对应的距离，以移动换能器使其中心与轨道的中心对应。在一个实施例中，数字信息被存储在与盘的边缘相邻的圆形参考轨道中，在另一个实施例中，数字信息存储在朝向磁盘中心延伸的螺旋轨道中。

2. 发明授权

US4149207A Cartridge and flexible magnetic disk assembly 失效
标题翻译：磁带盒和磁盘组件
公开(公告)号：US4149207A
公开(公告)日：1979-04-10
申请号：US845003
申请日：1977-10-25
申请人： Townsend H. Porter, Jr. , Robert E. Schopp
发明人： Townsend H. Porter, Jr. , Robert E. Schopp
IPC分类号： G11B5/82 , G11B3/58 , G11B17/03 , G11B23/00 , G11B23/033 , G11B23/04 , G11B5/016 , G11B3/62
CPC分类号： G11B3/5827 , G11B17/03 , G11B23/0035 , G11B23/033
摘要： A thin flexible magnetic disk rotatably disposed in a cartridge of rigid material and protected thereby. The disk is loosely mounted on a driving hub assembly and has an arrow shaped center hole surrounding a central round hub portion of the hub assembly. A drive pin is carried by the hub assembly and extends loosely through a corresponding hole located in the disk and spaced from the center of the hub assembly and located on a radial line preferably of about 90 degrees with respect to a radial line passing through the apex of the straight hole edges forming the arrow so that the disk is automatically centered on the hub assembly due to any restraint on the disk during its rotation.
摘要翻译：可旋转地设置在刚性材料盒中并由其保护的薄柔性磁盘。盘被松散地安装在驱动轮毂组件上，并且具有围绕轮毂组件的中心圆形轮毂部分的箭形中心孔。驱动销由轮毂组件承载并且松散地延伸穿过位于盘中的相应孔并且与轮毂组件的中心间隔开并且相对于穿过顶点的径向线优选位于径向线上，该径向线优选为大约90度形成箭头的直孔边缘，使得盘由于盘旋转期间的任何限制而自动地位于轮毂组件的中心。

3. 发明授权

US4970609A Clocking method and apparatus for use with partial response coded binary data 失效
标题翻译：用于部分响应编码二进制数据的时钟方法和装置
公开(公告)号：US4970609A
公开(公告)日：1990-11-13
申请号：US258937
申请日：1988-10-17
申请人： Earl A. Cunningham , Townsend H. Porter, Jr. , James W. Rae
发明人： Earl A. Cunningham , Townsend H. Porter, Jr. , James W. Rae
IPC分类号： G11B20/14 , H03L7/08 , H03L7/087 , H04L7/033
CPC分类号： H04L7/033 , H04L7/007
摘要： Clocking of Class IV partial response coded binary data is provided by way of circuit means that includes two analog threshold detectors. One detector is responsive to the analog read signal's positive-going amplitude corssing a a preset positive threshold value. The other detector is responsive to the read signal's negative-going amplitude crossing a preset negative value. The time of occurrence of both detector crossing transitions is phase-compared to a clock signal, and a phase error signal is generated for each detector, if a phase error exists. The two phase error signals are integrated by the use of a loop filter. The integrated phase error signal is then used to adjust the phase of a clock signal generator. The output of the clock signal generator is used to accurately clock, and to enable accurate recover of, the binary data that was originally encoded and written in accordance with the Class IV partial responsive coding convention.

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