公开(公告)号：US5184258A

公开(公告)日：1993-02-02

申请号：US712834

申请日：1991-06-10

申请人： Frederic F. Grant ,  Vincent J. Piarulli ,  Alexander R. Maxey ,  Robert Ryerson

发明人： Frederic F. Grant ,  Vincent J. Piarulli ,  Alexander R. Maxey ,  Robert Ryerson

IPC分类号： G11B15/61 ,  G11B15/665

CPC分类号： G11B15/6656

摘要： A helical scan magnetic tape recorder includes a rotary magnetic head scanner and a received magnetic tape cassette including spaced coplanar supply and take-up reels having magnetic tape spooled on the reels with a span of magnetic tape extending between the reels. Supply and take-up vacuum cavities are located contiguous to and on respective opposite sides of the scanner. Supply and take-up capstans are spaced from the rotary head scanner located in a tape transport path between the vacuum cavities and the tape cassette. Magnetic tape is initially removed from the cassette and moved to a tape vacuum loading position where it partially contacts the rotary head scanner, by a mechanical threading device. Thereafter, vacuum is applied to the vacuum cavities to draw the tape into contact with the vacuum cavities to substantially wrap the tape around the rotary head scanner. The supply and take-up capstans are rotated during vacuum threading to assist drawing the tape into the vacuum cavities.

摘要翻译： 螺旋扫描磁带录像机包括旋转磁头扫描器和接收的磁带盒，其包括间隔开的共面电源和卷取卷轴，磁带卷绕在卷轴上，磁带跨越卷轴之间延伸一段磁带。 供应和吸收真空腔定位在扫描仪的相对两侧和相对的两侧。 供应和卷绕绞盘与位于真空腔和带盒之间的带传送路径中的旋转头扫描仪隔开。 磁带最初从盒中取出并移动到通过机械穿线装置部分地接触旋转头扫描器的带真空装载位置。 此后，将真空施加到真空腔，以将带拉出与真空腔接触，从而基本上将带缠绕在旋转头扫描仪周围。 供应和卷取绞盘在真空穿线期间旋转，以帮助将带拉入真空腔。

公开(公告)号：US4967290A

公开(公告)日：1990-10-30

申请号：US236866

申请日：1988-08-26

申请人： Frederic F. Grant ,  John Grant

发明人： Frederic F. Grant ,  John Grant

IPC分类号： G02B6/36 ,  G02B6/43 ,  G11B5/53 ,  G11B15/14

CPC分类号： G11B5/531 ,  G02B6/3604 ,  G02B6/43 ,  G11B15/14

摘要： An electro-optical signal transmission module for transmitting an information signal between stationary and moving objects (such as the stationary and moving components of a rotary magnetic head scanner). The module has complementary mating structure to facilitate the stacking of a plurality of modules together, so that a plurality of separate information signals may be transmitted between relatively moving bodies.

摘要翻译： 一种用于在固定和移动物体（诸如旋转磁头扫描仪的静止和移动部件）之间传输信息信号的电光信号传输模块。 该模块具有互补的配合结构以便于将多个模块堆叠在一起，使得可以在相对运动的物体之间传输多个单独的信息信号。

公开(公告)号：US4609961A

公开(公告)日：1986-09-02

申请号：US642225

申请日：1984-08-20

申请人： John H. Jacobs

发明人： John H. Jacobs

IPC分类号： G02F1/09 ,  G11B11/105 ,  G11B5/127 ,  G11B11/10

CPC分类号： G11B11/10547 ,  G02F1/09

摘要： A Faraday-effect magneto-optic transducer provides for optimizing the transmission of light through the transducer. A transparent supporting assembly for a planar element of magneto-optic material includes first and second reflectors on opposing sides of the element. The reflectors direct polarized light through the element substantially normal to its interface with the supporting assembly, for preventing light loss due to internal reflections as light is transmitted through the supporting assembly and magneto-optic element.

摘要翻译： 法拉第效应磁光转换器提供优化通过传感器的光的传输。 用于磁光材料的平面元件的透明支撑组件包括在元件的相对侧上的第一和第二反射器。 反射器使偏振光通过基本上垂直于其与支撑组件的界面的元件，用于当光透射通过支撑组件和磁光元件时防止由内部反射引起的光损失。

公开(公告)号：US4442963A

公开(公告)日：1984-04-17

申请号：US369853

申请日：1982-04-19

申请人： Frederic F. Grant

发明人： Frederic F. Grant

IPC分类号： G11B15/58 ,  B65H17/32

CPC分类号： G11B15/58

摘要： Method and apparatus for advancing tape having an information recording surface relative to an information transducing head provide a sliding surface at a distance from the head, preferably paralleling a tape advance path in a transducing mode in which the tape moves with its information recording surface in engagement with the transducing head. For a fast tape advance mode, such as rapid rewind or fast forward, the tape is moved to the sliding surface away from the head. Preferably, the tape is so moved with the aid of a pressure gradient generated on a surface of the tape opposite its recording surface. The tape is then advanced along the sliding surface in the fast tape advance mode in spaced relationship to the transducing head, while preferably being maintained with the pressure gradient on the sliding surface for the duration of the particular fast tape advance.

摘要翻译： 提供具有相对于信息传感头的信息记录表面的胶带的方法和装置提供了一个与磁头相距一定距离处的滑动表面，优选地以磁带前进路径平行于传送模式，其中磁带随其信息记录表面接合而移动 与换能头。 对于快速的磁带提前模式，例如快速重绕或快进，磁带移动到离开磁头的滑动表面。 优选地，借助于在其与记录表面相对的带的表面上产生的压力梯度使带移动。 然后，磁带沿着与传感头间隔开的快速磁带提前模式沿着滑动表面前进，同时优选地在特定快速磁带前进的持续时间内保持滑动表面上的压力梯度。

公开(公告)号：US5341134A

公开(公告)日：1994-08-23

申请号：US998695

申请日：1992-12-30

申请人： Boonsieng Benjauthrit

发明人： Boonsieng Benjauthrit

IPC分类号： H03M7/14 ,  G11B20/14 ,  H03M5/14 ,  H03M7/20

CPC分类号： G11B20/1426 ,  H03M5/145 ,  G11B2020/1438

摘要： Digital data recording/reproducing apparatus which uses a simple coding scheme for DC channel codes of the form M/N where M=N-1 and M and N are positive integers.

摘要翻译： 数字数据记录/再现装置，其使用M / N形式的M / N形式的直流信道码的简单编码方案，其中M = N-1，M和N是正整数。

公开(公告)号：US5243477A

公开(公告)日：1993-09-07

申请号：US809189

申请日：1991-12-17

申请人： Frederic F. Grant ,  Vincent J. Piarulli

发明人： Frederic F. Grant ,  Vincent J. Piarulli

IPC分类号： G11B15/61 ,  G11B15/67

CPC分类号： G11B15/67 ,  G11B15/61

摘要： A magnetic tape recorder includes a rotary head scanner, a cartridge for containing a single reel of magnetic tape having a leader block at its end, a take-up reel and a leader block channel defining a tape path from the cartridge, past the rotary head scanner, to the take-up reel. A tape threading apparatus includes a first rotatably mounted arm segment, a first motor for rotating the first arm segment, a second arm segment rotatably mounted to the first arm segment, a second motor mounted on the first arm segment for rotating the second arm segment and a leader block carrier mounted on the end of the second arm segment for engaging the leader block to move it along the leader block channel.

公开(公告)号：US5163070A

公开(公告)日：1992-11-10

申请号：US623825

申请日：1990-12-07

申请人： Robert R. N. Bielby ,  Richard L. Couchman ,  Leo T. Van Lahr

发明人： Robert R. N. Bielby ,  Richard L. Couchman ,  Leo T. Van Lahr

IPC分类号： H04L7/04

CPC分类号： H04L7/042 ,  G11B20/1833 ,  H04L7/043

摘要： A digital data synchronizer, synchronizes a digital data system to an incoming serial bit stream having a segment of pseudo random bit sequence, which is a function of a predetermined primitive polynomial, preceeding the start of data. The synchronizer includes a first feedback shift register configured as a multiplier for generating the pseudo random bit sequence. The multiplier register operates on the incoming serial bit stream to determine whether a valid bit sequence of the primitive polynomial is present in the incoming serial bit stream, and if it is, a zero output is produced. A second feedback shift register configured as a divider produces a pseudo random bit sequence which is also a function of the predetermined primitive polynomial. A counter is provided to monitor the number of zeros outputted by the multiplier feedback shift register. When a preset count is reached, the contents of the multiplier shift register is parallel loaded into the divider shift register if the bit sequence of the divider shift register does not match the bit sequence of the incoming serial data. Thus, the divider pseudo random sequence is synchronized to the incoming serial data. A synch word detector monitors the parallel contents of the divider register. When the synch word detector detects a predetermined word in the pseudo random bit sequence produced by the divider, it produces an output flag which indicates the next bit in the incoming digital data word is the first data bit.

摘要翻译： 数字数据同步器将数字数据系统与具有在数据开始之前的预定原始多项式的函数的具有伪随机位序列的段的输入串行比特流同步。 同步器包括配置为用于产生伪随机位序列的乘法器的第一反馈移位寄存器。 乘数寄存器对输入的串行比特流进行操作，以确定输入串行比特流中是否存在原始多项式的有效比特序列，如果是，则产生零输出。 配置为分频器的第二反馈移位寄存器产生伪随机比特序列，该伪随机比特序列也是预定原始多项式的函数。 提供一个计数器来监视乘法器反馈移位寄存器输出的零数。 当达到预设计数时，如果分频器移位寄存器的位序列与输入串行数据的位序列不匹配，则乘法器移位寄存器的内容将并行加载到分频器移位寄存器中。 因此，分频器伪随机序列与输入的串行数据同步。 同步字检测器监视分频器寄存器的并行内容。 当同步字检测器检测到由分频器产生的伪随机位序列中的预定字时，其产生输出标志，其指示输入数字数据字中的下一位是第一数据位。

公开(公告)号：US5003417A

公开(公告)日：1991-03-26

申请号：US285835

申请日：1988-12-16

申请人： Frederic F. Grant

发明人： Frederic F. Grant

IPC分类号： G11B15/68 ,  G11B33/08

CPC分类号： G11B15/6835 ,  G11B33/08

摘要： A magnetic tape cassette transport/accessor assembly is actuated by a sprocket driven, belt drive system. First and second belt drives drive the transport/accessor assembly in horizontal and vertical directions and are tensioned by spring dampener assemblies. Each spring dampener assembly dampens rough and jerky movements and effects smooth and gentle acceleration and deceleration of the transport/accessor assembly. Each spring dampener assembly also provides compensation for belt drive wear, belt stretching and differential thermal expansion and contraction of the belt.

摘要翻译： 磁带盒传送/存取组件由链轮驱动的皮带驱动系统驱动。 第一和第二皮带驱动器在水平和垂直方向上驱动输送/存取组件，并由弹簧阻尼器组件张紧。 每个弹簧阻尼器组件都可以阻止粗糙的动作，并且对运输/存取组件的加速和减速进行平滑和平缓的处理。 每个弹簧阻尼器组件还为皮带传动磨损，皮带拉伸和皮带差热膨胀和收缩提供补偿。

公开(公告)号：US4989110A

公开(公告)日：1991-01-29

申请号：US317364

申请日：1989-03-01

申请人： Thomas M. Zevin ,  Roy A. Utley

发明人： Thomas M. Zevin ,  Roy A. Utley

IPC分类号： G11B15/61

CPC分类号： G11B15/61

摘要： The rotary head scanner of a helical scan magnetic tape recording/reproducing apparatus includes a carrier which supports the fixed drum or drums of the scanner by means of full radius contact between the drum and the carrier. A rotary head scanner includes upper and lower stationary drums and a head wheel rotably mounted in a slot between the stationary drums. The head wheel includes one or more magnetic heads mounted on the periphery of the head wheel. The rotating heads record on and reproduce from slant tracks on magnetic tape guided around the scanner in a helical path. The upper and lower drums are supported by a carrier which effects full radius contact over a large circumferential arc. Such contact effects rigid mounting of the drums without distortion, thus, minimizing distortion in magnetic tape as it is guided around the rotary head scanner.

摘要翻译： 螺旋扫描磁带记录/再现装置的旋转头扫描器包括一个通过滚筒和载体之间的全半径接触来支撑扫描仪的固定鼓或滚筒的载体。 旋转头扫描器包括上和下静止鼓和可旋转地安装在固定鼓之间的狭槽中的头轮。 头轮包括安装在头轮周边上的一个或多个磁头。 旋转头在螺旋路径上围绕扫描仪引导的磁带上的倾斜轨迹记录并再现。 上鼓和下滚筒由在大圆周弧上实现全半径接触的载体支撑。 这样的接触效果使得滚筒刚性安装而不会变形，从而最小化磁带绕着旋转头扫描器引导时的变形。

公开(公告)号：US4958248A

公开(公告)日：1990-09-18

申请号：US286426

申请日：1988-12-19

申请人： Milan V. Trcka

发明人： Milan V. Trcka

IPC分类号： G01P3/486 ,  G01P13/04 ,  G11B5/53 ,  G11B15/473

CPC分类号： G11B15/4731 ,  G01P13/045 ,  G01P3/486 ,  G11B5/53

摘要： For use in a helical scan magnetic tape record/reproduce apparatus, disclosed is a rotary head scanner including a reflective tachometer/headwheel assembly. The rotary head scanner includes a plurality of magnetic record/reproduce heads mounted on a headwheel which has a reflective tachometer disposed on one side of the headwheel. A radiation source and radiation sensor are located adjacent to the reflective tachometer. The radiation sensor senses radiation reflected from the tachometer and produces a signal which is a function of the rotational position and/or rotational speed of the headwheel.

摘要翻译： 为了在螺旋扫描磁带记录/再现装置中使用，公开了一种旋转头扫描仪，其包括反射式转速计/前轮组件。 旋转头扫描仪包括安装在头轮上的多个磁记录/再现头，其具有设置在头轮的一侧上的反射式转速计。 辐射源和辐射传感器位于反射转速表附近。 辐射传感器感测从转速计反射的辐射，并产生与头轮的旋转位置和/或转速有关的信号。