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    Overcurrent sense circuit
    1.
    发明授权
    Overcurrent sense circuit 失效
    过流检测电路

    公开(公告)号：US3919565A

    公开(公告)日：1975-11-11

    申请号：US45863874

    申请日：1974-04-08

    Applicant: IBM

    Inventor： CLARK VIRGIL R ,  GOODEW CARROLL D ,  KUEPER TERRANCE W ,  PRICE BYRON H

    IPC: G01R19/165 ,  H02H3/08 ,  H02H3/087 ,  H03K5/20 ,  H02H7/20

    CPC classification number: H02H3/087

    Abstract: An overcurrent sense circuit for sensing an overcurrent condition at the output of a power supply uses inherent D. C. resistance and the voltage drop associated with current flow through that resistance to generate a logic signal indicating the overcurrent condition. A current source offsets the maximum allowable voltage drop across the equivalent resistance for normal operation. The offset voltage and voltage drop across the equivalent resistance are fed into a comparator. When the voltage drop across the equivalent resistance exceeds the maximum allowable voltage drop due to an overcurrent condition, the comparator switches and thereby provides an output indicating the overcurrent condition.

    Abstract translation: 用于感测电源输出端的过电流状态的过电流检测电路使用固有的D.C电阻和与通过该电阻的电流相关联的电压降，以产生指示过电流状态的逻辑信号。 电流源抵消正常工作时的等效电阻上的最大允许电压降。 等效电阻两端的失调电压和电压降被馈入比较器。 当跨过等效电阻的电压降超过由于过电流条件引起的最大允许电压降时，比较器开关，从而提供指示过电流条件的输出。

    Omnidirectional optical scanner
    2.
    发明授权
    Omnidirectional optical scanner 失效
    全向光学扫描仪

    公开(公告)号：US3919527A

    公开(公告)日：1975-11-11

    申请号：US38278373

    申请日：1973-07-26

    Applicant: IBM

    Inventor： BOWEN ARLEN J ,  DICKSON LEROY D ,  GORETZKI JEROME A ,  HENDRICKSON KENNETH E ,  KING DONALD P ,  KUEPER TERRANCE W ,  SODERSTROM RONALD L

    IPC: G02B26/10 ,  G06K7/10 ,  G08C9/06

    CPC classification number: G06K7/10871

    Abstract: An omnidirectional optical scanner scans bar coded labels passed relative to a rectangular scan window with a plurality of interlaced X''s whereby the labels are completely scanned irrespective of their orientation. The interlaced X''s are generated from a laser light source directed onto a first oscillating mirror for deflecting the light beam in a horizontal direction at a slow frequency. A second oscillating mirror is positioned to further deflect the light beam in a vertical direction at a higher frequency. The horizontal and vertical frequencies are set at a particular ratio so that the X''s overlap and the scan on the return passes midway between the legs of a previous scan. The horizontal and vertical amplitudes are controlled by horizontal and vertical photo detectors located adjacent the scan window which provide inputs to amplitude control circuits to assure an orthogonal pattern by keeping the crossing angle constant. The oscillating mirrors are phase and frequency locked by a precision digital system to assure phase lock stability and thereby prevent voids in the scan pattern. The scan window crops out the end portions of the scan pattern. Generally, the most linear parts of the scan pattern, but including the turn around portions of the scans within the scan window are used. However, in one embodiment, end mirrors fold the end portions of the scan pattern outside of the window into the scan window toward the center thereof to enhance the scanning of certain labels.

    Abstract translation: 全向光学扫描仪扫描相对于具有多个交错X的矩形扫描窗口传送的条形编码标签，由此标签被完全扫描，而不管其取向如何。

    OMNIDIRECTIONAL OPTICAL SCANNER
    4.
    发明专利
    OMNIDIRECTIONAL OPTICAL SCANNER 未知

    公开(公告)号：CA1051553A

    公开(公告)日：1979-03-27

    申请号：CA203370

    申请日：1974-06-25

    Applicant: IBM

    Inventor： BOWEN ARLEN J ,  DICKSON LEROY D ,  GORETZKI JEROME A ,  HENDRICKSON KENNETH E ,  KING DONALD P ,  KUEPER TERRANCE W ,  SODERSTROM RONALD L

    IPC: G02B26/10 ,  G06K7/10 ,  G08C9/06

    Abstract: An omnidirectional optical scanner scans bar coded labels passed relative to a rectangular scan window with a plurality of interlaced X's whereby the labels are completely scanned irrespective of their orientation. The interlaces X's are generated from a laser light source directed onto a first oscillating mirror for deflecting the light beam in a horizontal direction at a slow frequency. A second oscillating mirror is positioned to further deflect the light beam in a vertical direction at a higher frequency. The horizontal and vertical frequencies are set at a particular ratio so that the X's overlap and the scan on the return passes midway between the legs of a previous scan. The horizontal and vertical amplitudes are controlled by horizontal and vertical photo detectors located adjacent the scan window which provide inputs to amplitude control circuits to assure an orthogonal pattern by keeping the crossing angle constant. The oscillating mirrors are phase and frequency locked by a precision digital system to assure phase lock stability and thereby prevent voids in the scan pattern. The scan window crops out the end portions of the scan pattern. Generally, the most linear parts of the scan pattern, but including the turn around portions of the scans within the scan window are used. However. in one embodiment, end mirrors fold the end portions of the scan pattern outside of the window into the scan window toward the center thereof to enhance the scanning of certain labels.

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