Adjustable electronic time switch
    8.
    发明授权
    Adjustable electronic time switch 失效
    可调电子时间开关

    公开(公告)号:US4155003A

    公开(公告)日:1979-05-15

    申请号:US855892

    申请日:1977-11-30

    申请人: Ulrich Grassme

    发明人: Ulrich Grassme

    摘要: In the illustrated embodiments, a rotary position encoder is manually positioned to select any of a set of x-ray exposure times to be used in making medical x-ray photographs. In one form, the encoder output selects a code word from a read only memory, and a comparator ends the timing cycle when a counter reaches a count value corresponding to the active code word. The pulse generator supplying input pulses to the counter, rather than operating at a constant rate, may be controlled so that the pulse count per unit time corresponds to a specified mAs-product, an x-ray tube being switched off when a selected count value (corresponding to a desired mAs-product) is reached.

    摘要翻译: 在所示的实施例中,旋转位置编码器被手动地定位成选择用于制造医用x射线照片的一组x射线曝光时间中的任何一个。 在一种形式中,编码器输出从只读存储器中选择代码字,并且当计数器达到对应于有效代码字的计数值时,比较器结束定时周期。 可以控制向计数器提供输入脉冲而不是以恒定速率操作的脉冲发生器,使得每单位时间的脉冲数对应于指定的mAs乘积,当选择的计数值 (对应于期望的mAs产物)。

    Long period battery-operated aerosol dispenser
    10.
    发明授权
    Long period battery-operated aerosol dispenser 失效
    长时间电池操作的气溶胶分配器

    公开(公告)号:US3589563A

    公开(公告)日:1971-06-29

    申请号:US3589563D

    申请日:1969-08-11

    申请人: GEN TIME CORP

    CPC分类号: B65D83/262 H03K17/28

    摘要: An automatic aerosol dispenser for producing periodic discharge from an aerosol container at long, accurately determined time intervals on the order of 15 minutes or more and which is completely self-contained, operating on low battery voltage on the order of 3 volts. The time interval is determined by an RC circuit having a long-time constant, with a transistor detectoramplifier, including feedback, for initiating a cycle of motor rotation. The capacitor of the RC circuit is restored to reference condition in an RC circuit of short-time constant. An electromechanical driving arrangement is disclosed which is particularly suited for low-voltage operation.