CN2608303Y - 一种能画椭圆的尺规作图仪 - Google Patents

一种能画椭圆的尺规作图仪 Download PDF

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CN2608303Y
CN2608303Y CN 03201973 CN03201973U CN2608303Y CN 2608303 Y CN2608303 Y CN 2608303Y CN 03201973 CN03201973 CN 03201973 CN 03201973 U CN03201973 U CN 03201973U CN 2608303 Y CN2608303 Y CN 2608303Y
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draw
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刘翠萍
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Abstract

一种能画椭圆的尺规作图仪，它是在已有的直尺，圆规，规绳，游标，量角器连成一体的尺规作图仪上，使规绳的两个固定点均处于尺体的边缘之外，这就确保椭圆的两个焦点处于尺体边缘之外，因而可以先画某椭圆的多半部分，再画其余部分，从而就可使所画椭圆的两部分实现准确吻接。

Description

一种能画椭圆的尺规作图仪
本实用新型涉及一种几何作图用具，属于文具领域。
目前，几何学进行尺规作图，常用的工具是直尺、圆规和量角器，由于这三者不成一体，99247827.8号专利申请和02204579.1号专利申请均提出了圆规、直尺、量角器三位一体方案，并且能够画椭圆。这些方案虽然可行，但由于其用以画椭图的规绳穿在尺体的同一侧边缘处，这就使所要画的椭圆焦点只能处在尺体边上，故在先画出半个椭圆再画另一半时，难以使椭圆两半部分准确吻接。
本实用新型的目的是提供一种能准确画椭圆的尺规作图仪，它不仅具有99247827.8号专利和02204579.1号专利的全部功能和优点，而且能在先画出半个椭圆再画另一半时，使两者准确吻接。
本实用新型的目的是这样实现的：分别将固定规绳的直尺0刻度和游标两处凸到尺体边缘之外，这样，由于固定规绳的两点都被移到了尺体边缘之外，就可先画多半个椭圆，再画这个椭圆的其他部分，从而就可使两者准确吻接。
由于采用上述方案，可先画出某椭圆的多半部分，再画另半部分，从而就能使椭圆的两半部分准确吻接，这是本实用新型的优点。
下面结合附图和实施例对本实用新型进一步说明。
图1是本实用新型的构造图。
图中：1、直尺  2、规绳  3、固绳螺钉  4、游标  5、量角器
在图1中，直尺(1)与量角器(5)制成一体，规绳(2)一端穿在直尺0刻度的圆柱孔中，另一端可用固绳螺钉(3)连同游标(4)固定在直尺(1)的一定刻度上。画椭圆时，只要量出适当的规绳长，就可用笔尖撑着规绳画椭圆。

Claims (1)

1、一种能画椭圆的尺规作图仪，在其直尺和量角器铸在一起的尺体上装有规绳和游标，其特征是：规绳的两个固定点均在直尺体的边缘之外。
CN 03201973 2003-01-12 2003-01-12 一种能画椭圆的尺规作图仪 Expired - Fee Related CN2608303Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 03201973 CN2608303Y (zh) 2003-01-12 2003-01-12 一种能画椭圆的尺规作图仪

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Application Number Priority Date Filing Date Title
CN 03201973 CN2608303Y (zh) 2003-01-12 2003-01-12 一种能画椭圆的尺规作图仪

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CN2608303Y true CN2608303Y (zh) 2004-03-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103481704A (zh) * 2013-10-18 2014-01-01 李增庆 一种椭圆规

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103481704A (zh) * 2013-10-18 2014-01-01 李增庆 一种椭圆规

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