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1. 发明授权

US4851647A Process for welding butt-jointed plastic tubes and welding device for performing the process 失效
标题翻译：用于焊接对接塑料管和用于执行该过程的焊接装置的工艺
公开(公告)号：US4851647A
公开(公告)日：1989-07-25
申请号：US226545
申请日：1988-08-01
申请人： Siegfried Kuhling
发明人： Siegfried Kuhling
IPC分类号： B29C65/20 , B29C65/34 , B29D23/00 , F16L47/00 , F16L47/02
CPC分类号： B29D23/005 , B29C65/342 , B29C65/3476 , B29C66/1142 , B29C66/5221 , F16L47/02 , B29C66/71 , Y10T403/477 , Y10T428/218
摘要： In order to weld butt-jointed plastic tubes, a welding element with a wire coil for electrical resistance heating is positioned between the abutting tube ends. The tube ends are pressed to each other while at the same time the welding device is heated to welding temperature. Lastly, the tube ends are held together until the welded area has hardened by cooling. The welding device is constructed in the form of an annular disc the external diameter of which is approximately equal to the external diameter of the tubes and the internal diameter of which is approximately equal to the nominal internal diameter of the tubes. A heating wire coil spirals around the geometric center of the annular disc, and is positioned on the two annular disc surfaces that come into contact with the tube ends.
摘要翻译：为了焊接对接的塑料管，具有用于电阻加热的线圈的焊接元件位于邻接的管端之间。管端彼此挤压，同时焊接装置被加热到焊接温度。最后，管端保持在一起，直到焊接区域通过冷却硬化。焊接装置构造为环形盘的形式，其外径近似等于管的外径，其内径近似等于管的标称内径。加热丝线圈围绕环形盘的几何中心螺旋，并且位于与管端接触的两个环形盘表面上。

2. 发明授权

US4638663A Level indicating device for liquid containers 失效
标题翻译：液体容器液位指示装置
公开(公告)号：US4638663A
公开(公告)日：1987-01-27
申请号：US807809
申请日：1985-12-11
申请人： Gottfried Seelhorst
发明人： Gottfried Seelhorst
IPC分类号： B65D90/48 , B65D25/00 , G01F23/30 , G01F23/32 , H01H35/18 , G01F23/36
CPC分类号： G01F23/303 , G01F23/32
摘要： A level indicating device for liquid filled containers is provided having a floating sensing element which is operatively connected with a signal device, the sensing element having several, preferably three floats arranged on a single plane. The floats are supported on lever arms which are interconnected with each other at a central union. The lever arm union is supported for free movement in a guide disposed approximately in the center of the container and approximately vertically aligned with the surface of the liquid when the liquid is at rest. The longitudinal movement of the lever arm union in the guide caused by changing liquid levels is transmitted to a signal device for monitoring the liquid level.
摘要翻译：提供了一种用于液体填充容器的液位指示装置，其具有与信号装置可操作地连接的浮动感测元件，该感测元件具有布置在单个平面上的几个，优选三个浮子。浮子支撑在杠杆臂上，它们在中心联接处彼此相互连接。杠杆臂联接件被支撑在大致在容器的中心处布置的引导件中的自由运动，并且当液体静止时大致垂直地与液体表面对齐。通过改变液位导致的引导器中的杠杆臂联接器的纵向移动被传送到用于监测液位的信号装置。

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