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发明名称
一种用于描绘平面椭圆的椭圆仪
摘要
一种用于描绘平面椭圆的椭圆仪。用两根分别固定在两支水平摇臂上的纵向针杆确定椭圆的焦点,用一根两头与针杆相连的长度可调的细线限定椭圆轨迹。一支专用绘图笔能够沿着细线限定的轨迹描绘椭圆。 该椭圆仪减小了双导轨式椭圆仪的机械尺寸限制,扩大了椭圆仪的适用范围。
申请公布号
CN2149295Y
申请公布日期
1993.12.15
申请号
CN92243768.8
申请日期
1992.12.04
申请人
吴元生
发明人
吴元生
分类号
B43L11/045
主分类号
B43L11/045
代理机构
代理人
主权项
1、一种用于描绘平面椭圆的椭圆仪,由叉头2、摇臂3和4构成支架,其特征是固定于支架的两个活动端上的定位针杆5和6上各有一个小孔,细线8穿过定位针杆5与6上的小孔与调节旋钮7连接。
地址
350005福建省福州市六一中路七十二号
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