公开(公告)号：US4851710A

公开(公告)日：1989-07-25

申请号：US174641

申请日：1988-03-29

申请人： Edward L. Grivna

发明人： Edward L. Grivna

IPC分类号： H03K5/00 ,  H03K3/037 ,  H03L7/00 ,  H04L7/00 ,  H04L25/08 ,  H04L25/40

CPC分类号： H03K3/0375

摘要： A metastable prevent circuit comprises a plurality of parallel channels, each coupled to receive and synchronize asynchronous pulses to a synchronous clock signal. A shift register is responsive to the asynchronous pulses to sequentially enable individual ones of the channels. In the case of a two-channel system, the shift register is a bistable device which enables the channels alternately.

公开(公告)号：US4837923A

公开(公告)日：1989-06-13

申请号：US187968

申请日：1988-04-29

申请人： Amarjit S. Brar ,  Jimmie E. Mims ,  Jagdish P. Sharma

发明人： Amarjit S. Brar ,  Jimmie E. Mims ,  Jagdish P. Sharma

IPC分类号： B24B37/04 ,  G11B5/105 ,  G11B5/193

CPC分类号： B24B37/04 ,  G11B5/105 ,  G11B5/193 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A process for fabricating magnetic transducing heads includes successive grinding, lapping and finishing steps. The ferrite cores of the transducing heads are rough cut with a silicone carbide grinding wheel, to an excess over desired final throat height equal to approximately one-half the nominal diameter of the grinding wheel grit. The core and supporting pads then are placed on a soft tin or lead rotating lapping plate for removing substantially all of the excess. Finally, the pads and cores are hand-finished on a stationary plate or soft tin, copper or lead. A diamond slurry used during lapping and final finishing, has a controlled alkaline pH in order to simultaneously chemically etch and polish the cores.

摘要翻译： 用于制造磁转导头的方法包括连续研磨，研磨和精加工步骤。 转换头的铁氧体磁芯用碳化硅砂轮粗切，超过所需最终喉部高度的大约等于砂轮砂粒公称直径的大约二分之一。 然后将芯和支撑垫放置在软锡或铅旋转研磨板上，用于基本上除去所有过量的。 最后，垫子和芯子是在固定的板或软锡，铜或铅上手工制作的。 在研磨和最终精加工期间使用的金刚石浆料具有受控的碱性pH，以便同时化学蚀刻和抛光芯。

公开(公告)号：US4810520A

公开(公告)日：1989-03-07

申请号：US100317

申请日：1987-09-23

申请人： Cherng-Dean Wu

发明人： Cherng-Dean Wu

IPC分类号： C23C18/00 ,  C23C18/16 ,  C23C18/31 ,  C23C18/32 ,  B05D5/12

CPC分类号： C23C18/1675

摘要： An improved method for controlling magnetic quality of electroless plating in which the plated substrates are subjected to magnetic film deposition for a true plating time determined by offsetting the total plating time by the activation time, the activation time being the time for surface potential transients to decrease and steady state surface potential to occur.

公开(公告)号：US4777906A

公开(公告)日：1988-10-18

申请号：US794156

申请日：1985-11-01

申请人： Richard C. Mourning ,  Gordon W. Nygren

发明人： Richard C. Mourning ,  Gordon W. Nygren

IPC分类号： B01F11/00 ,  B05C11/02 ,  B01F5/00 ,  B01F15/02

CPC分类号： B05C11/028 ,  B01F11/0042

摘要： Apparatus is shown for mixing and dispensing an epoxy adhesive. An epoxy resin and its associated curing agent are simultaneously loaded from separate cartridges into a length of flexible PVC tubing, part of which is contained between a rotor and a stator. Bearings, mounted rotatably about the rotor, engage and travel along the tubing as the rotor is revolved, each bearing compressing the tubing at its point of engagement. The tubing, repeatedly compressed and released by each bearing in succession, kneads the epoxy resin and curing agent into a homogeneous mixture. From the tubing, the epoxy mixture is deposited on a moving carrier tape and forms a continuous bead. Downstream, a control tape is spaced apart from the carrier tape and moves in the opposite direction. As the bead encounters the control tape, the control tape removes part of the bead material from the carrier tape and plastically forms the remaining mixture into a film of a uniform thickness substantially less than the bead diameter. Further downstream, an automatic pick-up device contacts the film over a controlled area and thus picks up a controlled amount of the epoxy mixture.

摘要翻译： 显示用于混合和分配环氧粘合剂的装置。 环氧树脂及其相关的固化剂同时从单独的盒装载到一段柔性PVC管中，其中一部分被包含在转子和定子之间。 当转子旋转时，围绕转子可旋转地安装的轴承接合并沿着管道行进，每个轴承在其接合点处压缩管道。 每个轴承连续重复压缩和释放的管道将环氧树脂和固化剂揉成均匀的混合物。 从管道中，环氧混合物沉积在移动的载带上并形成连续的珠粒。 在下游，控制带与载带间隔开并沿相反方向移动。 当小珠遇到控制带时，控制带从载带上去除部分胎圈材料，并将剩余的混合物塑形成基本上小于胎圈直径的均匀厚度的膜。 进一步下游，自动拾取装置在受控区域上接触薄膜，从而拾取受控量的环氧混合物。

公开(公告)号：US4769727A

公开(公告)日：1988-09-06

申请号：US898374

申请日：1986-08-20

申请人： James C. Mao

发明人： James C. Mao

IPC分类号： G11B5/60 ,  G11B5/54 ,  G11B21/21

CPC分类号： G11B5/6005

摘要： An improved self-loading magnetic head slider for recording and reading data on a magnetic storage disk, is characterized by the addition of aerodynamically designed wings used for lowering the slider close to the surface of the disk to a designed head-to-disk separation as the disk is rotated. The magnetic head slider does not contact the magnetic storage disk surface.

摘要翻译： 用于在磁存储盘上记录和读取数据的改进的自加载磁头滑块的特征在于，添加空气动力学设计的翼，用于将靠近盘表面的滑块降低到设计的磁头到磁盘分离，如 磁盘旋转。 磁头滑块不接触磁存储盘表面。

公开(公告)号：US4760319A

公开(公告)日：1988-07-26

申请号：US20289

申请日：1987-02-27

申请人： Donald W. Janz

发明人： Donald W. Janz

IPC分类号： H03K5/007 ,  G11B21/08 ,  G11C27/02 ,  H03F1/30 ,  H03K4/12 ,  H03K5/26 ,  G05B5/01

CPC分类号： G11C27/026 ,  H03F1/303

摘要： Provided is a circuit for removing an unwanted temporal portion of an incoming signal and for differentiating that signal with respect to a reference voltage level. It includes an input for receiving the incoming signal current through an input capacitor, a differential amplifier for converting input charging current into a voltage with respect to a reference voltage, and a charging capacitor for holding a voltage level representative of the charging current supplied to the differential amplifier during times when the unwanted input signal portion is to be removed from the circuit's output. A current sink and source provides a reset period voltage charge to the input capacitor during times when the unwanted portion is to be removed from the outgoing signal. A switch responds to a reset signal immediately preceding or on the occurrence of the unwanted signal portion. The charging capacitor is charged during the gradually sloping portion of the incoming signal so as to hold a voltage level representative of the incoming charging current when the rapid slope transition (unwanted signal portion) occurs. During such time the reset signal causes the switch to allow the charging capacitor to provide its stored voltage level via the current sink and source to the differential amplifier and input capacitor.

公开(公告)号：US4662830A

公开(公告)日：1987-05-05

申请号：US773280

申请日：1985-09-06

申请人： Kenneth L. Pottebaum

发明人： Kenneth L. Pottebaum

IPC分类号： F04D29/28 ,  F04D29/66 ,  H02K7/20 ,  H02K9/06 ,  H05K7/20

CPC分类号： H05K7/20172 ,  F04D29/281

摘要： A fan is disclosed that contains cut-outs that reduce the noise levels. The fan is used to cool circuit boards.

摘要翻译： 公开了一种风扇，其包含降低噪声水平的切口。 风扇用于冷却电路板。

公开(公告)号：US4652779A

公开(公告)日：1987-03-24

申请号：US666525

申请日：1984-10-30

申请人： Lawrence A. Wilcox

发明人： Lawrence A. Wilcox

IPC分类号： H02K41/035 ,  H02K41/00

CPC分类号： H02K41/0358

摘要： A construction for actuator assemblies is disclosed using a material of low permeance as a structural element, included normal to the axis of coil movement to lower coil inductance by reducing reactance flux in support structures and providing a channel for eddy currents set up in response to coil reactance. The net result is enhanced coil responsiveness to energization.

摘要翻译： 公开了一种用于致动器组件的结构，其使用低磁导材料作为结构元件，包括垂直于线圈运动的运动以通过减小支撑结构中的电抗通量来降低线圈电感并提供响应于线圈设置的涡流的通道 电抗。 最终的结果是增强线圈对通电的响应。

公开(公告)号：US4627039A

公开(公告)日：1986-12-02

申请号：US564656

申请日：1983-12-23

申请人： Russell A. Meyer

发明人： Russell A. Meyer

IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B21/08 ,  G11B21/10 ,  G11B7/00

CPC分类号： G11B21/085 ,  G11B7/085 ,  G11B7/0901

摘要： An optical recording system has a system optical apparatus carried by a fine tracking system which moves the optical apparatus for small track seeking movements and for track following. The fine tracking system is carried by a linear actuator coarse tracking system which makes large track seeking movements so that the entire area of the optical recording media is available to the system. Both the coarse tracking system and the fine tracking system are operated by servo control loops. The fine tracking system responds to tracking status signals with respect to track following and track seeking signals in response to track addressing information. The coarse tracking system responds to position sensor signals derived from a position sensor which is associated with the fine tracking system and provides signals related to the relative position of the fine tracking system to the coarse tracking system. The coarse tracking system follows the movements of the fine tracking system using signals from the position sensing system as the only necessary control for the coarse tracking system.

摘要翻译： 光学记录系统具有由精细跟踪系统承载的系统光学装置，该系统光学装置移动用于小轨迹寻找运动的光学装置和跟踪跟踪。 精细跟踪系统由线性致动器粗跟踪系统承载，该系统进行大的追踪运动，使得光学记录介质的整个区域可用于系统。 粗跟踪系统和精细跟踪系统都由伺服控制回路操作。 精细跟踪系统响应于轨道寻址信息响应跟踪跟踪和追踪信号的跟踪状态信号。 粗跟踪系统响应从与精细跟踪系统相关联的位置传感器得到的位置传感器信号，并提供与精细跟踪系统相对于粗跟踪系统的相对位置相关的信号。 粗跟踪系统使用来自位置感测系统的信号作为精细跟踪系统的运动，作为粗跟踪系统的唯一必要控制。

公开(公告)号：US4568881A

公开(公告)日：1986-02-04

申请号：US491001

申请日：1983-05-03

申请人： Anna Kostrov

发明人： Anna Kostrov

IPC分类号： H03L7/089 ,  H04L7/033 ,  H03K3/02

CPC分类号： H04L7/033 ,  H03L7/0891

摘要： A phase comparator and data separator is disclosed capable of establishing a detection window of the order of 100 percent of the clock cycle at a data recovery rate at least as great as 100 MHz. One of the preferred embodiments of the invention comprises three bistable flip-flops interconnected with OR gates to respond to a data input pulse stream and a clock pulse stream to provide, in response to each data pulse, a reference pulse having a width equal to the bit cell period and a variable pulse having a duration which is greater or less than the reference pulse duration in accordance with the direction and amount of time displacement of the input pulse from the center of the bit cell in which the input pulse occurs.

摘要翻译： 公开了一种相位比较器和数据分离器，其能够以至少高达100MHz的数据恢复速率建立大约100％的时钟周期的检测窗口。 本发明的优选实施例之一包括与OR门互连以响应数据输入脉冲流的三个双稳态触发器和时钟脉冲流，以响应于每个数据脉冲提供宽度等于 根据来自输入脉冲发生的位单元的中心的输入脉冲的时间位移的方向和量，具有大于或小于参考脉冲持续时间的持续时间的可变脉冲。