Servomechanisms that decelerates properly on approach to limit of travel
    1.
    发明授权
    Servomechanisms that decelerates properly on approach to limit of travel 失效
    对旅行限制适用的服务机构

    公开(公告)号:US3795853A

    公开(公告)日:1974-03-05

    申请号:US3795853D

    申请日:1971-12-27

    发明人: WHITEHOUSE J

    IPC分类号: G03B17/14 G05D3/14 G05G5/00

    CPC分类号: G05D3/1427 G03B17/14

    摘要: In a velocity-controlled servomechanism having also a position sensor such as a potentiometer, the invention provides an input circuit responsive to the reaching of a predetermined position for applying a fixed voltage source as the input to the velocity servo to cause the servo actuator to decelerate, suitably as it approaches the limits of its travel.

    摘要翻译: 在具有诸如电位计的位置传感器的速度控制的伺服机构中,本发明提供一种响应于到达预定位置的输入电路,用于施加固定电压源作为速度伺服的输入,以使伺服致动器减速 ,因为它接近其旅行的极限。

    Camera lens control mechanism
    2.
    发明授权
    Camera lens control mechanism 失效
    摄像机镜头控制机制

    公开(公告)号:US3798517A

    公开(公告)日:1974-03-19

    申请号:US3798517D

    申请日:1971-12-22

    发明人: WHITEHOUSE J

    IPC分类号: G02B7/08 G03B17/14 G03B3/10

    CPC分类号: G02B7/08 G03B17/14

    摘要: The invention concerns a control module for attaching to a lens and including an actuator and a feedback path, the actuator driving the controlled lens element through a slipping clutch. The invention provides switch means on the module for injecting fixed signals into the feedback system to drive the actuator to either end of the travel of the controlled element to align same with a feedback device (e.g. a potentiometer) on setting up the module on the lens.

    摘要翻译: 本发明涉及一种用于附接到透镜并包括致动器和反馈路径的控制模块,致动器通过滑动离合器驱动受控透镜元件。 本发明提供了模块上的开关装置,用于将固定信号注入到反馈系统中,以将致动器驱动到受控元件的行进的任一端,以将反射装置(例如电位器)与在透镜上设置模块的反馈装置(例如,电位器)对齐 。

    Electronic switching apparatus
    3.
    发明授权
    Electronic switching apparatus 失效
    电子开关装置

    公开(公告)号:US3786278A

    公开(公告)日:1974-01-15

    申请号:US3786278D

    申请日:1972-01-31

    发明人: WHITEHOUSE J WILD C

    IPC分类号: H03K17/72

    CPC分类号: H03K17/72

    摘要: A switching circuit for enabling a selected one of a number of channels. The circuit includes a number of devices, one for each channel, each having a voltage/current characteristic with a negative-impedance region separating two stable states. The devices are fed in parallel from a source of constant current or constant voltage of a magnitude such that only one may assume one of the stable states. The devices may be for example programmable unijunction transistors or tunnel diodes.

    摘要翻译: 一种切换电路,用于启用多个通道中的所选择的一个。 电路包括多个器件,每个通道一个,每个器件具有电压/电流特性,其中负阻抗区域分离两个稳定状态。 这些器件由恒定电流源或恒定电压并联馈送,其大小使得仅一个可以采用稳定状态之一。 器件可以是例如可编程单结晶体管或隧道二极管。