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1. 发明公开

EP0030256A1 Buried servo track data recording systems 失效
标题翻译： Aufzeichnungssysteme mit Servosignalen auf einer unterliegenden Spur。
公开(公告)号：EP0030256A1
公开(公告)日：1981-06-17
申请号：EP80105783.7
申请日：1980-09-25
申请人： International Business Machines Corporation
发明人： Keidl, Steven Dennis
IPC分类号： G11B5/58 , G11B5/02
CPC分类号： G11B5/58 , G11B5/02 , G11B5/5965
摘要： An improved data recording system operating with a buried servo track carried by the recording medium (10) has the common read/write gap (14) of the transducer (13) in the transducer/track position controlling servo-loop (40, 41, 20, 37, 41, 42, 43, 22) for both reading and writing data. During writing, the data input, adjusted and inverted, is also applied to the servo-loop together with intended position control signals via lines 34 and 35.
摘要翻译：由记录介质（10）承载的埋置伺服磁道操作的改进的数据记录系统具有在换能器/磁道位置控制伺服环路（40,41）中的换能器（13）的公共读/写间隙（14） 20,37,41,42,43,22），用于读取和写入数据。在写入期间，经过线路34和35的数据输入，调整和反相也与预期的位置控制信号一起应用于伺服环路。

2. 发明授权

EP0027873B1 Electrical stepper motor 失效
标题翻译：电动步进电机
公开(公告)号：EP0027873B1
公开(公告)日：1985-02-13
申请号：EP80105082.4
申请日：1980-08-27
申请人： International Business Machines Corporation
发明人： Keidl, Steven Dennis
IPC分类号： H02P8/00
CPC分类号： H02P8/14

3. 发明公开

EP0082337A3 Control system for flexible disk file 失效
标题翻译：灵活磁盘文件控制系统
公开(公告)号：EP0082337A3
公开(公告)日：1983-10-26
申请号：EP82110826
申请日：1982-11-23
申请人： International Business Machines Corporation
发明人： Keidl, Steven Dennis , Shidler, Karl Allen
IPC分类号： G11B17/02 , G11B05/55 , G11B19/28
CPC分类号： G11B19/12 , G11B19/28 , G11B21/106 , G11B23/36 , G11B23/42 , G11B27/32 , G11B2220/20 , G11B2220/2512
摘要： Control information for a flexible magnetic desk storage assembky (41, 42) is recorded on the periphery of the disk (42) in a region not used for recording data. The control information is read through the protective cover or envelope (41) which encloses the disk by means of a magnetic transducer (25) such as a four track audia cassette head which bears against the envelope. By recording index and sector pulses as part of the control information, hard sectoring can be inexpensively and accurately achieved. A recorded fixed frequency control signal can be read and used as part of the feedback loop in a phase locked oscillator used to control a d.c. motor driving the spindle. The control information can also include servo tracks which assist in registering the data transducer directly over data tracks on media which has changed its dimensions.

4. 发明授权

EP0082337B1 Assembly including a flexible disk and a diskdrive therefor 失效
标题翻译：组装包括一个灵活的磁盘和一个磁盘
公开(公告)号：EP0082337B1
公开(公告)日：1986-02-19
申请号：EP82110826.3
申请日：1982-11-23
申请人： International Business Machines Corporation
发明人： Keidl, Steven Dennis , Shidler, Karl Allen
IPC分类号： G11B17/02 , G11B5/55 , G11B19/28
CPC分类号： G11B19/12 , G11B19/28 , G11B21/106 , G11B23/36 , G11B23/42 , G11B27/32 , G11B2220/20 , G11B2220/2512

5. 发明授权

EP0030256B1 Buried servo track data recording systems 失效
标题翻译： BURIED伺服轨迹数据记录系统
公开(公告)号：EP0030256B1
公开(公告)日：1984-02-15
申请号：EP80105783.7
申请日：1980-09-25
申请人： International Business Machines Corporation
发明人： Keidl, Steven Dennis
IPC分类号： G11B5/58 , G11B5/02
CPC分类号： G11B5/58 , G11B5/02 , G11B5/5965

6. 发明公开

EP0082337A2 Assembly including a flexible disk and a diskdrive therefor 失效
标题翻译：排列与柔性板，以及驱动装置，为此。
公开(公告)号：EP0082337A2
公开(公告)日：1983-06-29
申请号：EP82110826.3
申请日：1982-11-23
申请人： International Business Machines Corporation
发明人： Keidl, Steven Dennis , Shidler, Karl Allen
IPC分类号： G11B17/02 , G11B5/55 , G11B19/28
CPC分类号： G11B19/12 , G11B19/28 , G11B21/106 , G11B23/36 , G11B23/42 , G11B27/32 , G11B2220/20 , G11B2220/2512
摘要： Control information for a flexible magnetic desk storage assembky (41, 42) is recorded on the periphery of the disk (42) in a region not used for recording data. The control information is read through the protective cover or envelope (41) which encloses the disk by means of a magnetic transducer (25) such as a four track audia cassette head which bears against the envelope. By recording index and sector pulses as part of the control information, hard sectoring can be inexpensively and accurately achieved. A recorded fixed frequency control signal can be read and used as part of the feedback loop in a phase locked oscillator used to control a d.c. motor driving the spindle. The control information can also include servo tracks which assist in registering the data transducer directly over data tracks on media which has changed its dimensions.

7. 发明公开

EP0027873A1 Electrical stepper motor 失效
标题翻译：电动步进电机。
公开(公告)号：EP0027873A1
公开(公告)日：1981-05-06
申请号：EP80105082.4
申请日：1980-08-27
申请人： International Business Machines Corporation
发明人： Keidl, Steven Dennis
IPC分类号： H02P8/00
CPC分类号： H02P8/14
摘要： Stepper motor control circuitry is described including a phase locked loop circuit (120) formed by a phase detector (122) out putted to a filter (124) and a voltage controlled triangular and square wave generator (126) which has a frequency control input terminal (J) connected to the output of the filter (124) and which provides a square wave on an output (134) thereof connected as an input to the phase detector (122). An oscillator (144) drives the phase detector (122), and the outputs (132, 134, 140) of the generator (126) are connected as inputs to a pulse width modulated driver (146) which has its outputs connected to the coils (W, X, Y, Z) of the stepper motor. A differential amplifier (156) is connected across one of the coils (X) of the motor, and a balanced modulator synchronous detector or multiplier (168) has two inputs one of which constitutes an output of the differential amplifier and the other of which is a connection to the square wave output (134) of the generator (126). The output of the multiplier (168) constitutes an error signal which is supplied to a summing junction (176) between the filter (124) and generator (126) so that, upon the application of an instantaneous load to the stepper motor, the error signal causes a very quick return to normal speed of the motor.

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