聊城大学研究生处
舞蹈基本功专利名称：GUIDING LIGHT SYSTEM FOR TRAILER TOW CAR HOOK-UP
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发明人：GREEN L,US
ps图片很烦躁怎么办申请号：US3731274D
申请日：19710920
公开号：US3731274A
公开日：
饭桌
19730501
古筝牌子排名专利内容由知识产权出版社提供
摘要：This apparatus embodies equipment to produce in front of the driver of a tow car two signal devices in the form of lamps which show the driver of the car whether or not it is backing directly toward the hook-up position to attach a trailer coupling when it is clo to this position and when it reaches hook-up position. The signal devices are right-hand and left-hand lamps, mounted on the dash or the instrument panel of the car. At the rear end of the car two spring contactors are mounted on the car side by side. A cable pass between the contactors and is wound on a spring take-up reel that is spaced in front of the spring contactors on the car. The cable is an electricity conductor and has means, insulated from the cable at its free end to attach it to the trailer coupling. The lamps each have one terminal connected to the ungrounded side of the car battery and the other terminal connected to one of the spring contactors so that so long as the cable engages both contactors there is a circuit completed from the battery through each lamp then through its conductor to the spring contactor, then through the cable to ground and the grounded side of the battery. If the cable pushes either contactor away from the other one then the lamp connected to the other one has its circuit broken, and shows dark to the driver. The cable has an insulation, covering it adjacent to its free end
to darken both lamps when the car is in clo proximity to hook-up position.
申请人：GREEN L,US
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