公开(公告)号：US06188535B1

公开(公告)日：2001-02-13

申请号：US08193179

申请日：1994-02-09

Applicant: James U. Lemke ,  A. Bruce Manildi ,  James C. Crosby ,  Charles J. Spatafore

Inventor： James U. Lemke ,  A. Bruce Manildi ,  James C. Crosby ,  Charles J. Spatafore

IPC: G11B2104

CPC classification number: G11B5/0086 ,  G11B5/588 ,  G11B15/1875 ,  G11B15/4678

Abstract: A tape drive includes a rotary head assembly for recording and playing back a series of arcuate tracks on a moving tape where the tracks are transverse to the longitudinal axis of the tape. The tape drive includes a servo mechanism for correcting track misregistration by adjusting the position of the rotary head assembly with respect to the tape in response to servo information in the arcuate tracks. A close transducing engagement between the tape and the rotary head assembly is provided by creation of a low ambient pressure between the assembly and the tape when the assembly rotates.

Abstract translation: 磁带驱动器包括用于在移动的磁带上记录和重放一系列弧形磁道的旋转磁头组件，其中磁道横向于磁带的纵向轴线。 磁带驱动器包括伺服机构，用于通过响应于弓形轨道中的伺服信息调整旋转磁头组件相对于磁带的位置来校正磁道重合。 通过在组件旋转时在组件和带之间产生低环境压力来提供带和旋转头组件之间的紧密转换接合。

公开(公告)号：US4739950A

公开(公告)日：1988-04-26

申请号：US901757

申请日：1986-08-28

Applicant: Turgay Goker ,  Henry L. Alioth ,  Charles J. Spatafore

Inventor： Turgay Goker ,  Henry L. Alioth ,  Charles J. Spatafore

IPC: H02P5/46 ,  G11B15/46 ,  G11B15/54 ,  G11B15/67 ,  B65H77/00

CPC classification number: G11B15/54 ,  G11B15/46 ,  G11B15/67

Abstract: This system moves magnetic tape past the read/write head at a constant velocity by separately servo controlling the source reel motor and the take-up reel motor. Separate fine encoders are associated with each reel, each encoder providing multiple pulses for each revolution of the respective reel. Two radius calculation circuits each receive pulses from a respective one of the encoders and each calculate therefrom the radius values of tape on both of the reels. A radius information selector then selects, for use in controlling the motors, that set of radius values which is calculated by the calculation circuit which is receiving encoder pulses at the greater sampling rate. Separate servo circuits drive the two motors at respective angular velocities determined by utilizing the selected set of radius values. In each drive circuit, the associated tape radius is multiplied by the actual reel angular velocity, as indicated by the time duration between consecutive pulses from the encoder associated with that reel. Each servo maintains this product equal to a preselected tape linear velocity value, thereby causing the separate motors to rotate the reels so as to establish the desired constant linear tape velocity.

Abstract translation: 该系统通过分别伺服控制源卷筒电动机和卷取卷轴电动机将磁带以恒定速度移动通过读/写头。 单独的精密编码器与每个卷轴相关联，每个编码器为相应卷轴的每转提供多个脉冲。 两个半径计算电路各自接收来自编码器中的相应一个的脉冲，并且从中计算两个卷轴上的磁带的半径值。 然后，半径信息选择器选择用于控制电动机的由接收更大采样率的编码器脉冲的计算电路计算的半径值集合。 单独的伺服电路通过利用所选择的一组半径值确定的各个角速度来驱动两个电动机。 在每个驱动电路中，相关带的半径乘以实际的卷轴角速度，如来自与该卷轴相关联的编码器的连续脉冲之间的持续时间所示。 每个伺服维持该产品等于预先选定的磁带线速度值，从而使单独的电动机旋转卷轴，以便建立所需的恒定线性带速度。

公开(公告)号：US5200953A

公开(公告)日：1993-04-06

申请号：US776574

申请日：1991-10-15

Applicant: Charles J. Spatafore ,  Dann P. McCreary

Inventor： Charles J. Spatafore ,  Dann P. McCreary

IPC: H04L29/06

CPC classification number: H04L29/06

Abstract: A system for receiving data which is destined for station facilities on a ring-topology network includes a forwarding data channel for establishing data communication between the ring-topology network and the facilities. A station memory for selectively holding data to be transmitted from the facilities over the forwarding data channel and onto the network is also connected to the channel. Additionally, a processor, which generates and continually updates an instruction data frame with address information about the facilities is connected to the station memory. A switch interconnects the forwarding data channel with the ring-topology network to selectively receive data onto the station's channel from the network. A content addressable memory (CAM), which is also connected with the forwarding data channel, receives instruction data frames from the processor, via the station memory over the channel, to control the switch in accordance with address information contained in the instruction data frame.

Abstract translation: 用于接收在环形拓扑网络上用于站点设施的数据的系统包括用于在环形拓扑网络和设施之间建立数据通信的转发数据信道。 用于选择性地保持要通过转发数据信道从设施传送的数据并进入网络的站存储器也连接到该信道。 此外，生成并连续地更新具有关于设施的地址信息的指令数据帧的处理器被连接到站内存。 交换机将转发数据信道与环形拓扑网络互连，以便有选择地从网络向站的信道接收数据。 还与转发数据信道连接的内容可寻址存储器（CAM）通过信道经由站存储器从处理器接收指令数据帧，以根据包含在指令数据帧中的地址信息来控制开关。