Tracking control which avoids lock-up for rotary head reproducing
apparatus and which senses whether a trucking control signal is absent
for a predetermined time
    71.
    发明授权
    Tracking control which avoids lock-up for rotary head reproducing apparatus and which senses whether a trucking control signal is absent for a predetermined time 失效
    跟踪控制,避免旋转磁头重放装置的锁定,并且在预定时间内感测到卡车控制信号是否不存在

    公开(公告)号:US5412520A

    公开(公告)日:1995-05-02

    申请号:US132358

    申请日:1993-10-06

    申请人: Isao Saito

    发明人: Isao Saito

    CPC分类号: G11B15/4678

    摘要: In rotary head reproducing apparatus of the type having heads which scan successive tracks on a record medium that is movable at a controllable speed, wherein such tracks contain a pattern of tracking control signals that are used by a servo control arrangement to determine and correct tracking errors, at least one of the tracking control signals that are reproduced from the tracks is detected, and if that tracking control signal is not sensed for a predetermined time interval, the speed at which the record medium is driven is changed to a predetermined speed (e.g. greater or less than the normal speed), thereby forcing tracking errors. This prevents lock-up which could occur when the tracks which are scanned by the heads are precisely out-of-phase from the correct tracks.

    摘要翻译: 在具有扫描能够以可控速度移动的记录介质上的连续轨道的头部的旋转磁头重放装置中,其中这些磁道包含由伺服控制装置用于确定和校正跟踪误差的跟踪控制信号的模式 检测从轨道再现的跟踪控制信号中的至少一个,并且如果在预定的时间间隔内未检测到该跟踪控制信号,则将记录介质驱动的速度改变为预定速度(例如, 大于或小于正常速度),从而迫使跟踪误差。 这样可以防止由磁头扫描的轨迹与正确轨迹精确地相位不同而发生锁定。

    Tracking control apparatus of rotary head type recording unit using
pilot signals of different frequencies and different formats
    72.
    发明授权
    Tracking control apparatus of rotary head type recording unit using pilot signals of different frequencies and different formats 失效
    使用不同频率和不同格式的导频信号的旋转磁头型记录装置的跟踪控制装置

    公开(公告)号:US5402281A

    公开(公告)日:1995-03-28

    申请号:US29583

    申请日:1993-03-11

    摘要: A tracking control apparatus for a rotary head type recording unit having a first rotary head and a second rotary head for forming pairs of slant tracks on a magnetic type, each track having a head entering side tracking region and a head leaving side tracking region. First and second pilot signals of different frequencies are recorded in the head entering and head laving sides tracking region, with the first pilot signal being recorded at a predetermined position on the first track which precedes (in the track direction) the second pilot signal recorded at a predetermined position on the second track adjacent to the first track.

    摘要翻译: 一种用于旋转头型记录单元的跟踪控制装置,具有第一旋转头和第二旋转头,用于形成磁性对的倾斜轨道对,每个轨道具有头部进入侧跟踪区域和头部离开侧跟踪区域。 不同频率的第一和第二导频信号被记录在磁头进入和磁头分离侧跟踪区域中,其中第一导频信号被记录在第一磁道上的预定位置(在磁道方向上)记录在第二导频信号 在与第一轨道相邻的第二轨道上的预定位置。

    Tracking control devices for video tape recorders
    74.
    发明授权
    Tracking control devices for video tape recorders 失效
    跟踪磁带录像机的控制设备

    公开(公告)号:US4918546A

    公开(公告)日:1990-04-17

    申请号:US767659

    申请日:1985-08-21

    申请人: Isao Saito

    发明人: Isao Saito

    CPC分类号: G11B5/592

    摘要: A tracking control device for a video tape recorder comprises a bimorph leaf on which a rotary playback head is mounted so as to be deflectable in a direction perpendicular to tracks to be scanned. A triangular wave signal generating circuit comprising cascaded flip-flops generates a substantially triangular wave signal which is supplied to the bimorph leaf to cause the playback head to wobble relative to the tracks. A detecting circuit detects an envelope signal in the signal reproduced by the playback head, and a phase comparing circuit which includes an exclusive-OR circuit compares the phase of this envelope signal with the phase of the triangular wave signal. The output of the phase comparing circuit is fed back to the bimorph leaf to effect tracking correction.

    摘要翻译: 一种用于磁带录像机的跟踪控制装置,包括一个双压电晶片叶片,旋转播放头在该双瓣片上安装成可沿垂直于待扫描轨道的方向偏转。 包括级联触发器的三角波信号产生电路产生基本上三角形的波信号,其被提供给双压电晶片,以使重放头相对于磁道摆动。 检测电路检测由重放头再现的信号中的包络信号,并且包括异或电路的相位比较电路将该包络信号的相位与三角波信号的相位进行比较。 相位比较电路的输出反馈到双压电晶片进行跟踪校正。

    7-Carboxymethoxyphenylacetamido-3-cephem derivatives and antibacterial
preparations containing the same
    76.
    发明授权
    7-Carboxymethoxyphenylacetamido-3-cephem derivatives and antibacterial preparations containing the same 失效
    7-羧甲基苯乙酰氨基-3-头孢烯衍生物和含有它们的抗菌制剂

    公开(公告)号:US4546176A

    公开(公告)日:1985-10-08

    申请号:US544406

    申请日:1983-10-20

    CPC分类号: C07D405/12 C07D311/22

    摘要: 7-Carboxymethoxyphenylacetamido-3-cephem derivatives represented by the formula ##STR1## wherein R.sub.1 means hydroxy, C.sub.1 -C.sub.4 alkanoyloxy or C.sub.1 -C.sub.4 alkoxycarbonyloxy, R.sub.2 is hydrogen or methoxy, R.sub.3 denotes C.sub.1 -C.sub.4 alkanoyloxy, substituted or unsubstituted nitrogen-containing heterocyclic-thio or substituted or unsubstituted pyridinium with a proviso that, when R.sub.3 denotes the substituted or unsubstituted pyridinium, R.sub.3 forms an intramolecular salt with the carboxy at the 4-position of the cephem nucleus, and A is a group of the following formula: ##STR2## in which R.sub.4 and R.sub.5 are individually hydrogen or C.sub.1 -C.sub.4 alkyl, and their pharmaceutically acceptable salts, exhibit excellent anti-bacterial activities against Gram-negative bacteria, particularly, Pseud. aeruginosa, Kleb. pneumoniae, Ser. marcescens and the like.

    摘要翻译: 其中R 1表示羟基,C 1 -C 4烷酰氧基或C 1 -C 4烷氧羰基氧基,R 2为氢或甲氧基,R 3表示C 1 -C 4烷酰氧基,取代或未取代的含氮杂环基 硫代或取代或未取代的吡啶鎓,条件是当R3表示取代或未取代的吡啶鎓时,R3与头孢烯核的4位上的羧基形成分子内的盐,A是下式的基团: 其中R 4和R 5独立地为氢或C 1 -C 4烷基及其药学上可接受的盐,对抗革兰氏阴性细菌,特别是Pseude显示出优异的抗细菌活性。 铜绿假单胞菌 肺炎支原体 粘液囊等。