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2. 发明授权

US4024641A Instrument for drawing geometric figures 失效
标题翻译：绘制几何图形的仪器
公开(公告)号：US4024641A
公开(公告)日：1977-05-24
申请号：US623125
申请日：1975-10-16
申请人： Joseph Chudner
发明人： Joseph Chudner
IPC分类号： B43L11/00 , B43L11/04
CPC分类号： B43L11/00
摘要： An instrument for producing on the surface of a given sheet material a given geometric figure having preselected maximum width and length dimensions. A base through a suitable connecting structure carries a marking assembly which is freely movable with respect to the base and which has an inscribing member for inscribing on the surface of the sheet material the given geometric figure. An elongated bar is connected by a lower universal joint to the marking assembly and has an upper end adapted to be manipulated by the operator. Between its ends the bar extends slidably through an upper universal joint which can be adjusted in elevation so as to select a point along the bar about which the latter can be tilted in all directions. A template is formed with an opening through which the bar extends, the template having an inner peripheral edge conforming to the general configuration of the geometric figure which may, for example, be an ellipse, and a template-adjusting structure is operatively connected with the template for adjusting the angle of inclination thereof, the inner peripheral edge of the template limiting the extent to which the bar is tilted with respect to the above point while the bar is moved along the inner peripheral edge of the template to provide the given geometric figure on the surface of the sheet material. By way of adjusting the inclination of the template as well as the elevation of the universal joint through which the bar slidably extends it is possible to determine the maximum dimensions, namely the maximum length and maximum width, of the geometric figure.
摘要翻译：用于在给定片材的表面上生产具有预选的最大宽度和长度尺寸的给定几何图形的仪器。通过合适的连接结构的底座承载着一个可相对于基座自由移动的标记组件，该标记组件具有用于在给定几何图形上的片材材料的表面上刻写的内接构件。细长的杆通过下通用接头连接到标记组件，并且具有适于由操作者操纵的上端。在其端部之间，杆可滑动地延伸穿过可在高度上调节的上万向接头，以便选择沿着杆的点，后者可沿着该点在所有方向上倾斜。模板形成有开口，棒延伸通过该开口，模板具有与几何图形的一般构造相符的内周边缘，该外形边缘可以是例如椭圆形，并且模板调整结构与用于调节其倾斜角的模板，模板的内周边缘限制在沿着模板的内周边缘移动杆的同时相对于上述点倾斜的程度，以提供给定的几何图形在片材的表面上。通过调整模板的倾斜度以及通过其可滑动地延伸的万向接头的高度，可以确定几何图形的最大尺寸，即最大长度和最大宽度。

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