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10 条记录 (耗时 0.009 秒)

    Facsimile transducer
    6.
    发明授权
    Facsimile transducer 失效
    FACSIMILE传感器

    公开(公告)号：US3618124A

    公开(公告)日：1971-11-02

    申请号：US3618124D

    申请日：1969-04-18

    申请人： MAGNAVOX CO

    发明人： DREISBACH ROBERT H ,  SOUTH RUSSELL L

    IPC分类号： H04N1/032 ,  G01D15/20 ,  H04N1/24

    CPC分类号： H04N1/0323

    摘要： The disclosure describes an improved facsimile writing head of the moving coil type and particularly relates to an arrangement for providing a moving coil structure having low friction positioning and bearing surfaces and for providing mechanical damping of undesired oscillations and vibrations of the structure.

    Facsimile system with selective contrast control
    9.
    发明授权
    Facsimile system with selective contrast control 失效
    具有选择性对比度控制的FACSIMILE系统

    公开(公告)号：US3622698A

    公开(公告)日：1971-11-23

    申请号：US3622698D

    申请日：1969-03-03

    申请人： MAGNAVOX CO

    发明人： RICHESON WILLIAM E JR ,  DREISBACH ROBERT H

    IPC分类号： H03K5/01 ,  H04N1/407 ,  H03K3/295 ,  H04M11/08 ,  H04N1/40

    CPC分类号： H03K5/01 ,  H04N1/407

    摘要： The quality of pictures and printed documents reproduced in a facsimile receiver is improved by the use of circuits in both the transmitter and receiver. These circuits provide a more linear overall response of the system when picutres are transmitted, a high contrast black on white response when printed matter is transmitted and in general provide for better quality reproductions of documents, while maintaining compatibility when operating between old and new machines. The approach is to provide a circuit at the transmitter which can be switched according to whether the documents scanned are primarily photo or printed in nature and to provide a circuit at the receiver to develop the desired copy qualities when operating under various circumstances.