专利汇可以提供Optical failsafe airplane landing guidance system专利检索,专利查询,专利分析的服务。并且An optical failsafe airplane landing guidance system is disclosed. A pair of lights are placed longitudinally relative to each other along a runway and emit light beams pointed upwardly and parallel to the runway define the vertical boundaries of a safe landing corridor. The lights are connected in series and include a photocell and a bi-stable relay in their control circuit to control the level of light and disable the system when either of the lights is out of adjustment. Each light includes an attitude switch comprising a heavy cylindrical pendulum supported by a stranded cable and positioned in a cup submerged in a viscous liquid, such as an equal mixture of two silicone liquids having centistoke ratings of about a 5 to 1 ratio, having minimum viscosity change over an ambient temperature range of -65* F. to +130* F. The cylindrical pendulum is spaced from the cup by an annulus which forms a hydraulic orifice in which the ratio of the diameter of the cylindrical to the width of the orifice is about 10 to 1 so that the pendulum is vibration insensitive and the switch will not close under low frequency vibrations having a double amplitude of about 10 times the maximum allowable misadjustment acceptable for landing guidance.,下面是Optical failsafe airplane landing guidance system专利的具体信息内容。
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