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1. 发明授权

US4225889A Magnetic recording and reproducing apparatus having means for recording a cue-signal 失效
标题翻译：具有用于记录提示信号的装置的磁记录和重放装置
公开(公告)号：US4225889A
公开(公告)日：1980-09-30
申请号：US964684
申请日：1978-11-29
申请人： Toshiomi Yabu , Tatsuo Wada , Kouichi Yamada , Tadashi Yoshino
发明人： Toshiomi Yabu , Tatsuo Wada , Kouichi Yamada , Tadashi Yoshino
IPC分类号： G11B15/087 , G11B5/48 , G11B15/12 , G11B27/32 , G11B5/02 , G11B27/30
CPC分类号： G11B5/4893 , G11B15/12 , G11B27/32 , G11B2220/90
摘要： A magnetic tape recording and reproducing apparatus provided with means for recording a cue-signal which serves to mark a predetermined point of a magnetic tape on which video signals are recorded by a rotary magnetic head. The cue-signal is recorded by a full erasing head by supplying thereto a cue-signal current having a frequency lower than the frequency of the erasing current. For example, the cue-signal current is generated by using the control signal for synchronizing the rotation of the rotary head with the tape movement.
摘要翻译：一种磁带记录和再现装置，其具有用于记录提示信号的装置，其用于标记由旋转磁头记录有视频信号的磁带的预定点。通过向全擦除头提供具有低于擦除电流的频率的频率信号电流来记录提示信号。例如，通过使用用于使旋转头的旋转与带移动同步的控制信号来产生提示信号电流。

2. 发明授权

US4211964A Speed control circuit 失效
标题翻译：速度控制电路
公开(公告)号：US4211964A
公开(公告)日：1980-07-08
申请号：US7247
申请日：1979-01-29
申请人： Toshiomi Yabu , Tatsuo Wada , Kouichi Yamada , Tadashi Yoshino
发明人： Toshiomi Yabu , Tatsuo Wada , Kouichi Yamada , Tadashi Yoshino
IPC分类号： H02P23/00 , H02P5/16
CPC分类号： H02P23/16 , Y10S388/901 , Y10S388/902
摘要： This invention relates to a speed control circuit of a d.c. motor having a frequency generator. To the conventional method in which a rotation detection signal is delayed by a monostable multivibrator circuit and this delayed signal and the rotation detection signal are gated to obtain a speed error signal, a new time-voltage converter circuit is added, whereby even if the detected frequency of the generator is low, a stable speed control is possible. Because of no error synchronization, the present speed control circuit is suited to an apparatus which requires speed switching, and also to semiconductor integration.
摘要翻译：本发明涉及直流电机的速度控制电路。电机具有频率发生器。对于旋转检测信号被单稳态多谐振荡器电路延迟的传统方法，并且该延迟信号和旋转检测信号被选通以获得速度误差信号，添加新的时间 - 电压转换器电路，由此即使检测到发电机的频率低，可以进行稳定的速度控制。由于没有错误同步，本速度控制电路适合于需要速度切换以及半导体集成的装置。

3. 发明授权

US4338640A Speed control system for a multiple speed tape recording and reproducing apparatus 失效
标题翻译：用于多速带录音和再现设备的速度控制系统
公开(公告)号：US4338640A
公开(公告)日：1982-07-06
申请号：US122102
申请日：1980-02-15
申请人： Toshiomi Yabu , Tatsuo Wada , Masaru Hashirano , Kouichi Yamada
发明人： Toshiomi Yabu , Tatsuo Wada , Masaru Hashirano , Kouichi Yamada
IPC分类号： H04N5/7826 , G11B15/087 , G11B15/18 , G11B15/46 , G11B19/28
CPC分类号： G11B15/1808 , Y10S388/901 , Y10S388/908
摘要： A tape speed control system for a multiple speed tape recording and reproducing apparatus comprising a transducer head for reproducing a tape speed indicative signal which has been recorded along an edge of a recording tape. The frequency of the reproduced speed indicative signal is compared with a plurality of reference values to determine to which one of separate frequency bands the frequency of the reproduced speed signal belongs. If the latter belongs to the frequency band other than the frequency band which includes a predetermined frequency derived when the playback speed equals to the recording speed, a corresponding motor drive signal is generated to vary the speed of the tape until the frequency of the reproduced speed signal reaches the predetermined frequency.
摘要翻译：一种用于多速带记录和再现装置的磁带速度控制系统，包括用于再现沿着记录带的边缘记录的磁带速度指示信号的换能器头。将再现速度指示信号的频率与多个参考值进行比较，以确定再现速度信号的频率属于哪个分离的频带。如果后者属于包括当播放速度等于记录速度时导出的预定频率的频带以外的频带，则产生相应的电动机驱动信号以改变磁带的速度，直到再现速度的频率信号达到预定频率。

4. 发明授权

US3932889A Magnetic recording and reproducing system having an automatic tape drive control function 失效
标题翻译：具有自动磁带驱动控制功能的磁记录和再现系统
公开(公告)号：US3932889A
公开(公告)日：1976-01-13
申请号：US409096
申请日：1973-10-24
申请人： Kiyoshi Takeda , Toshiomi Yabu
发明人： Kiyoshi Takeda , Toshiomi Yabu
IPC分类号： G11B15/02 , G11B15/08 , G11B15/67 , G11B15/18 , G11B15/66
CPC分类号： G11B15/02 , G11B15/08 , G11B15/67
摘要： A magnetic recording and reproducing system using a one-reel catridge tape, which is provided at its leading end with a leader tape wider and more rigid than the magnetic tape and wound on a supply reel accommodated in a protective case, the tape being automatically loaded with the leader tape guided to a take-up reel through a leader tape guide having a slit extending in the direction of tape travel and wider than the magnetic tape but narrower than the leader tape. The system is provided with an automatic tape drive control circuit for effecting sequential control of the tape drive in various timings such as when commencing the loading of the tape, at the end of the tape loading, upon detection of the trailing end of the magnetic tape and at the end of the rewinding. Further, there is provided means for preventing the malfunctioning of the system in case trouble occurs in the tape progress detection means.
摘要翻译：一种磁记录和再现系统，其使用单线磁带，其前端设置有比磁带更宽且更刚性的引导带，并缠绕在容纳在保护壳中的供带盘上，磁带被自动加载引导带通过具有沿磁带行进方向延伸的狭缝的引导带引导件引导到卷带盘，并且比磁带宽，但比引导带窄。该系统设置有自动磁带驱动控制电路，用于以各种定时来执行磁带驱动器的顺序控制，例如当磁带加载结束时，在检测到磁带的后端时开始装入磁带并在倒卷的尽头。此外，提供了用于在带进度检测装置中发生故障的情况下防止系统故障的装置。

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