公开(公告)号：US4401026A

公开(公告)日：1983-08-30

申请号：US340213

申请日：1982-01-18

申请人： W. Sumner Brown

发明人： W. Sumner Brown

IPC分类号： B41J2/285 ,  B41J9/38 ,  B41J9/42 ,  B41J9/30

CPC分类号： B41J2/285 ,  B41J9/38 ,  B41J9/42

摘要： The hammer of a serial impact printer comprises a solenoid including a stationary magnetic structure with an opening extending therethrough and a movable magnetic structure adapted to move through the opening. The movable magnetic structure is accelerated by the flux path from the stationary magnetic structure and through the movable magnetic structure as the gap between the movable and stationary magnetic structures closes such that the movable magnetic structure is in substantially unobstructed free flight before the impact area coupled to the movable magnetic structure strikes the character element. The character element in turn strikes a print receiving medium supported by a platen, typically through an ink-bearing ribbon.

摘要翻译： 串联冲击打印机的锤子包括螺线管，其包括具有延伸穿过其中的开口的静止磁结构和适于移动穿过开口的可移动磁结构。 随着可移动磁性结构之间的间隙关闭，可移动磁性结构由固定磁性结构的磁通路径和可移动磁性结构加速，使得可动磁结构在冲击区域耦合到 可移动磁性结构撞击字符元件。 字符元件依次撞击由压板支撑的打印接收介质，通常通过含油墨带。

公开(公告)号：US4228387A

公开(公告)日：1980-10-14

申请号：US833265

申请日：1977-09-14

申请人： W. Sumner Brown

发明人： W. Sumner Brown

IPC分类号： H02P8/00 ,  B41J31/00 ,  C09D5/23 ,  G11B19/24 ,  G11B19/28 ,  H02K37/00

CPC分类号： G11B19/24

摘要： A variable reluctance motor of the stepper type is operated as a brushless constant speed DC motor by sensing the position of the rotor during rotation and generating a tachometric signal representing the speed of the rotor in response to the sensed position of the rotor. The tachometric signal is compared with a reference signal to generate a supply voltage to the windings of the stepper motor which will maintain the speed of the rotor substantially constant. The windings of the stepper motor are sequentially energized by the supply voltage in response to sensed position of the rotor. During start-up and prior to the time the motor reaches the predetermined speed, a start-up signal is utilized in addition to the sensed rotary position to sequentially energize the windings with the supplied voltage. The motor is utilized to drive a floppy magnetic data storage disc.

摘要翻译： 步进电机类型的可变磁阻电动机通过在旋转期间感测转子的位置而作为无刷恒速直流电动机运行，并响应于感测到的转子的位置产生表示转子速度的转速信号。 将转速信号与参考信号进行比较，以产生对步进电动机的绕组的电源电压，这将使转子的速度基本保持不变。 响应于感测到的转子的位置，步进电动机的绕组被电源电压顺序地通电。 在启动期间和电动机达到预定速度之前，除了感测到的旋转位置之外还利用启动信号，以随着所提供的电压顺序地激励绕组。 电机用于驱动软磁数据存储盘。

公开(公告)号：US4141046A

公开(公告)日：1979-02-20

申请号：US833268

申请日：1977-09-14

申请人： W. Sumner Brown

发明人： W. Sumner Brown

IPC分类号： G11B20/14 ,  G11B5/02

CPC分类号： G11B20/1419

摘要： A data separator circuit for use in decoding single density encoded data retrieved from a floppy disc, the circuit comprising a phased lock loop edge aligning circuit in combination with logic circuitry for providing a first output of separated data and a second output of the separated clock signals. The separator circuit generates an approximately periodic data window which is held in phased alignment with respect to the approximately periodic clock signal, the data window being utilized to gate out, or separate out only the single density encoded data.

摘要翻译： 一种用于解码从软盘检索的单密度编码数据的数据分离器电路，该电路包括与用于提供分离数据的第一输出和分离的时钟信号的第二输出的逻辑电路相结合的相控锁环边缘对准电路 。 分离器电路产生相对于大约周期性时钟信号保持相位对准的近似周期性的数据窗口，该数据窗口用于将输出或仅分离单个密度编码数据。