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    • 6. 发明授权
    • Aircraft adf with digital frequency display and timer
    • 具有数字频率显示和定时器的飞机ADF
    • US3816833A
    • 1974-06-11
    • US18072671
    • 1971-09-15
    • EDO CORP
    • RYAN D
    • G01S3/42G01S3/04
    • G01S3/42
    • An automatic direction finder for air navigation systems has an electronic pulse counting system with a frequency mode for providing a digital display of the frequency to which the radio is tuned and a timing mode which displays minutes and seconds. The count is visually displayed by a digital display unit. The counting system includes a series of pulse counters connected through a gating circuit to a local oscillator and a timing signal generator. The gating circuit passes timing pulses or pulses representing the radio frequency to the pulse counters, depending upon a predetermined selection of a time mode or a frequency mode, respectively. Decoding devices convert the count to a signal readable by the digital display unit. Logic circuitry resets and preloads the pulse counters and gates the output of the pulse counters to the decoding devices.
    • 用于空中导航系统的自动取向器具有电子脉冲计数系统,其具有用于提供无线电调谐频率的数字显示的频率模式以及显示分秒和秒的定时模式。 计数由数字显示单元在视觉上显示。 计数系统包括通过门控电路连接到本地振荡器和定时信号发生器的一系列脉冲计数器。 取决于分别对时间模式或频率模式的预定选择,门控电路将表示射频的定时脉冲或脉冲传送到脉冲计数器。 解码设备将计数转换为数字显示单元可读的信号。 逻辑电路复位并预加载脉冲计数器,并将脉冲计数器的输出输入解码器件。
    • 7. 发明授权
    • Ball tracker assembly
    • 球拖车总成
    • US3643148A
    • 1972-02-15
    • US3643148D
    • 1970-04-16
    • EDO CORP
    • BROWN ARTHURWONG THOMAS W
    • G01S13/66G05D3/12G05B11/01
    • G05D3/121G01S13/66Y10T74/20012Y10T74/20201
    • A ball tracker adapted for use in polar coordinate axis systems employs a rotating subframe including a rotatably mounted ball member and two ball rotation responsive sensors disposed 90* apart along the median ball circumference. The electronic output of the two sensors comprises polar coordinate range (r) and angle ( theta ) parameters, and feedback apparatus maintains the range sensor spatially aligned in an angular direction determined by the output of the angle sensor. A controlled environment ordered in polar coordinates, e.g., a cursor position in a polar cathode-ray tube display, may be regulated by actuating the ball tracker in a manner which is conceptually compatible with the natural predictions of a tracker operator.
    • 适用于极坐标轴系统的球跟踪器采用旋转子框架,其包括可旋转地安装的球形部件和沿着中心球圆周90度分开设置的两个球形旋转响应传感器。 两个传感器的电子输出包括极坐标范围(r)和角度(theta)参数,并且反馈装置将距离传感器维持在由角度传感器的输出确定的角度方向上空间对准。