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公开(公告)号:US20190287426A1
公开(公告)日:2019-09-19
申请号:US15924194
申请日:2018-03-17
IPC分类号: G09B29/00
摘要: The Sky Dial is a North Star based celestial observatory for measuring the position of celestial objects. This celestial observatory, when aimed at the North Star, creates a grid of stationary reference lines which divide the entire visible sky into near isosceles trapezoid shapes that can be identified by their grid coordinates, Ring Number and Hour Number. The Sky Dial allows people to observe celestial objects, and easily assign them a set of coordinates defining their current position. By comparing the grid positions of an object at different times, users can witness that all the stars rotate counter-clockwise around the North Star once every twenty-four hours, or 15 degrees per hour, and that distance from the North Star, called the ring, never changes. The Sky Dial can be used to measure the passage of time during the night just as a Sun Dial can do during the day.
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公开(公告)号:US20120274005A1
公开(公告)日:2012-11-01
申请号:US13094491
申请日:2011-04-26
CPC分类号: B22C9/043 , B29C64/00 , B33Y80/00 , Y02P10/292
摘要: A process for preparing for casting is provided and includes forming a cast component defining an interior having a complex and/or irregular shape, introducing a non-solid material into the cast component interior and solidifying the non-solid material to form an inner shell, forming an outer shell about the cast component and removing the cast component from between the inner and outer shells.
摘要翻译: 提供了一种用于铸造的制备方法,包括形成限定具有复合和/或不规则形状的内部的铸造组件,将非固体材料引入铸造组件内部并固化非固体材料以形成内壳, 围绕铸造部件形成外壳并从内壳和外壳之间移除铸造部件。
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公开(公告)号:US10438512B1
公开(公告)日:2019-10-08
申请号:US15924194
申请日:2018-03-17
IPC分类号: G09B29/00
摘要: The Sky Dial is a North Star based celestial observatory for measuring the position of celestial objects. This celestial observatory, when aimed at the North Star, creates a grid of stationary reference lines which divide the entire visible sky into near isosceles trapezoid shapes that can be identified by their grid coordinates, Ring Number and Hour Number. The Sky Dial allows people to observe celestial objects, and easily assign them a set of coordinates defining their current position. By comparing the grid positions of an object at different times, users can witness that all the stars rotate counter-clockwise around the North Star once every twenty-four hours, or 15 degrees per hour, and that distance from the North Star, called the ring, never changes. The Sky Dial can be used to measure the passage of time during the night just as a Sun Dial can do during the day.
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