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    • 3. 发明授权
    • Counter rotating, multi turbine flow measuring system
    • 逆向旋转,多涡轮流量测量系统
    • US4534226A
    • 1985-08-13
    • US547816
    • 1983-11-01
    • Leonard Rose
    • Leonard Rose
    • G01F1/10G01F1/115G01F1/12G01F1/90
    • G01F1/115G01F1/10
    • A volumetric flow measuring system includes two counter-rotating turbines axially displaced along the flow path. Because the turbines rotate in opposite directions, the net change of the sum of the main and sensor turbine signals due to non-axial or "swirl" components in the flow is zero thus cancelling their effects. In addition, the sensor turbine is operated at a lower speed than the main turbine so that main turbine speed errors due to "slip" (i.e. reduction of turbine speed from theoretical due to restraining torques) are counteracted by an increase in sensor speed. The only error then is the sensor turbine "slip" error which is smaller than the main turbine "slip" error by a factor equal to the ratio of the main and sensor turbine speeds.
    • 体积流量测量系统包括沿流动路径轴向移位的两个反向旋转涡轮机。 由于涡轮机以相反的方向旋转,所以由于流动中的非轴向或“涡旋”分量导致的主涡轮机信号和传感器涡轮机信号之和的净变化为零,从而消除其影响。 此外,传感器涡轮机以比主涡轮机低的速度运行,使得由于“滑动”(即,由于限制扭矩而使涡轮速度从理论上降低)的主要涡轮机速度误差由于传感器速度的增加而抵消。 唯一的错误是传感器涡轮机“滑差”误差小于主涡轮机“滑差”误差等于主涡轮机速度与传感器涡轮机转速之比。
    • 5. 发明授权
    • Braille display reader
    • 盲文显示阅读器
    • US4266936A
    • 1981-05-12
    • US958253
    • 1978-11-06
    • Leonard RoseStanley E. Rose
    • Leonard RoseStanley E. Rose
    • G06F3/01G06F3/147G09B21/00G09B21/02G06K9/00
    • G09B21/003
    • A portable braille display unit which presents an entire page of braille characters in response to data stored on a storage medium, such as a tape cassette. The display unit is the size of a conventional braille page, and the display unit may be made portable and self-powered. Each braille character is displayed by a braille cell display module in which spring actuated pins are controlled by bimetallic latches. Each module includes six pins which comprise the six dots of each braille cell. To display braille characters, an electrical current is applied to resistively heat selected ones of the bimetallic latches. In response to this current the selected bimetallic latches bend and disengage from the pin, allowing a compressed spring to move the pin upward through the surface plate to display a braille dot. The spring maintains the pin in this position without requiring power from the power supply.
    • 一种便携式盲文显示单元,其响应于诸如磁带盒的存储介质上存储的数据呈现盲文字符的整个页面。 显示单元是常规盲文页面的尺寸,并且显示单元可以被制成便携式和自供电。 盲文字符由盲文单元显示模块显示,其中弹簧致动的引脚由双金属闩锁控制。 每个模块包括六个引脚,其包括每个盲文单元的六个点。 为了显示盲文字符,施加电流以电阻加热双金属闩锁中的选定的一个。 响应于该电流,所选择的双金属闩锁从销弯曲和脱离,允许压缩弹簧将销向上移动通过表面板以显示盲文点。 弹簧将引脚保持在该位置,而不需要电源供电。