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81. 发明授权

US4166322A Rulers for making axonometric projection drawings 失效
标题翻译：制作轴突投影图纸的标尺
公开(公告)号：US4166322A
公开(公告)日：1979-09-04
申请号：US831997
申请日：1977-09-09
申请人： Akira Hirano
发明人： Akira Hirano
IPC分类号： B43L13/14
CPC分类号： B43L13/14
摘要： A ruler of transparent material having a first edge parallel to one of the three main projection axes of an axonometric projection drawing and a second edge at a specified angle .gamma. with one of the remaining two main projection axes. The ruler is provided on its front surface with a standard line sloping at a specified inversion angle with respect to the first edge and another standard line sloping at the inclination angle of an orthographic projection drawing with respect to the bisector of the inversion angle. An axonometric projection drawing can be made with the use of the ruler from a plan view and a front or side view drawn by orthographic projection and placed on a drawing board as arranged in the orthographic drawing.
摘要翻译：透明材料的尺子具有平行于轴突投影图的三个主投影轴中的一个的第一边缘和以剩下的两个主投影轴之一以指定的角度γ的第二边缘。标尺在其前表面上以相对于第一边缘以指定的反转角度倾斜的标准线和相对于反转角度的平分线的正投影图的倾斜角倾斜的标准线。可以使用标尺从俯视图和由正投影绘制的前视图或侧视图进行轴突投影图，并将其放置在布置在正交图中的绘图板上。

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