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122 条记录 (耗时 0.015 秒)

    Laser printing system with developable helicoid reflector
    1.
    发明授权
    Laser printing system with developable helicoid reflector 失效
    激光打印系统与可开发的螺旋反射器

    公开(公告)号：US4494821A

    公开(公告)日：1985-01-22

    申请号：US472733

    申请日：1983-03-07

    申请人： John R. Lewis ,  Andrew McCurdy ,  Arthur D. Gaudet

    发明人： John R. Lewis ,  Andrew McCurdy ,  Arthur D. Gaudet

    IPC分类号： G02B26/10 ,  H04N1/16 ,  G02B27/17

    CPC分类号： G02B26/10 ,  H04N1/16

    摘要： Line scanning apparatus are especially compensated to limit beam divergence in one direction by embodying a specularly reflective developable helicoid. Beam divergence in the direction orthogonal to the aforementioned one direction is masked by a narrow slit extending longitudinally in the direction of the longitudinal center axis of the helicoid.

    摘要翻译： 线扫描装置被特别补偿以通过体现镜面反射显影螺旋来限制一个方向上的光束发散。 在与上述一个方向正交的方向上的光束发散由在螺旋体的纵向中心轴线的方向上纵向延伸的窄狭缝掩蔽。

    Selectively coupled synthesizer for tuner of TV receiver
    2.
    发明授权
    Selectively coupled synthesizer for tuner of TV receiver 失效
    用于电视接收机调谐器的选择性耦合合成器

    公开(公告)号：US4128849A

    公开(公告)日：1978-12-05

    申请号：US689660

    申请日：1976-05-24

    申请人： Dennis W. Rhee

    发明人： Dennis W. Rhee

    IPC分类号： H03J7/18 ,  H03J5/02 ,  H03J7/02 ,  H03J7/06 ,  H03J7/10 ,  H03J7/28 ,  H04B1/26 ,  H04N5/44 ,  H04N1/16 ,  H04N5/21 ,  H04N5/50

    CPC分类号： H03J5/0272 ,  H03J7/06 ,  H03J7/10

    摘要： A television receiver is disclosed including a varactor-type tuner selectively coupled to a synthesizer. Illustratively, the synthesizer includes a keyboard for selecting the desired channel within the UHF or VHF band, a channel memory for receiving and storing the selected channel and a programmable divider which divides selectively the output of the tuner's local oscillator in accordance with the selected channel to generate and apply its output to a phase comparator. The output of a reference oscillator also is applied to the phase comparator, whereby the output of the programmable divider is mixed therewith to obtain a tuning voltage to be applied to the tuner, which is associated with an automatic fine-tuning circuit (AFT); the AFT is adapted to be detuned selectively to increase the amplitude of the picture carrier signal and therefore, enhance the quality of the displayed images for weak signals, such as received from distant stations.

    摘要翻译： 公开了一种电视接收机，包括选择性地耦合到合成器的变容二极管型调谐器。 说明性地，合成器包括用于选择UHF或VHF频带内的所需频道的键盘，用于接收和存储所选择的频道的频道存储器和根据所选择的频道选择性地分频调谐器本地振荡器的输出的可编程分频器 生成并将其输出应用到相位比较器。 参考振荡器的输出也被施加到相位比较器，由此可编程分频器的输出与其混合，以获得施加到与自动微调电路（AFT）相关联的调谐器的调谐电压; AFT适于被选择性地失谐以增加图像载波信号的幅度，并且因此提高诸如从远距离站接收的弱信号的显示图像的质量。

    Irradiating system for line-by-line copier
    3.
    发明授权
    Irradiating system for line-by-line copier 失效
    线对复制器辐射系统

    公开(公告)号：US4066328A

    公开(公告)日：1978-01-03

    申请号：US681032

    申请日：1976-04-28

    申请人： Rudolf Paulus ,  Walter Gutmann ,  Wilfried Hofmann

    发明人： Rudolf Paulus ,  Walter Gutmann ,  Wilfried Hofmann

    IPC分类号： H04N1/16 ,  G02B27/17

    CPC分类号： H04N1/16

    摘要： Light is projected as a beam from a fixed laser source onto a helical reflecting surface continuously rotating about its central axis. The beam impinges the reflecting surface in an incident direction substantially parallel to the rotation axis and is reflected from the surface in a direction skew to this axis. A reflector extending the full axial length of the reflecting surface then reflects the beam back onto the reflecting surface in a direction so oriented that the reflecting surface reflects the beam a second time, but now in a direction generally perpendicular to the axis of rotation. The reflecting surface and the reflector are both concave so as to condense the beam.

    Facsimile receiver having movable printing bar
    4.
    发明授权
    Facsimile receiver having movable printing bar 失效
    具有可移动印刷条的传真接收机

    公开(公告)号：US3939481A

    公开(公告)日：1976-02-17

    申请号：US493104

    申请日：1974-07-30

    申请人： Jacques Mary ,  Pierre Merillou

    发明人： Jacques Mary ,  Pierre Merillou

    IPC分类号： H04N1/032 ,  H04N1/16 ,  B41J3/20

    CPC分类号： H04N1/032

    摘要： In a facsimile receiver wherein the printing bar is mounted for reciprocal movement between an operative position against the drum carrying the printing helix and an inactive position remote therefrom, means is provided for automatically displacing the printing bar toward its operative position upon rotation of said drum. In this regard a mechanical locking means is included for maintaining said printing bar in its operative position and a release mechanism serves to release the printing bar upon termination of the printing operation.

    摘要翻译： 在传真接收机中，其中印刷条被安装用于在承载打印螺旋的滚筒的操作位置与远离其的不活动位置之间往复运动，设置有用于在所述滚筒旋转时将印刷条自动移动到其操作位置的装置。 在这方面，包括用于将所述印刷条保持在其操作位置的机械锁定装置，并且释放机构用于在打印操作终止时释放印刷条。