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发明名称
抛物双曲两用规
摘要
本实用新型是一种画抛物线和双曲线的画图工具。它的结构包括固定滑轨,笔套和两个滑动框架,两滑动框架都分别恰能插入固定滑轨,并能自由滑动,固定滑轨由两个滑轨槽和固定在一边框上且与滑轨槽垂直的焦点板构成,一滑动框架包括两滑条及与滑条垂直的笔套挡和两个加固板条构成,另一滑动框架包括两滑条,固定二滑条的矩形框架及可以转动的笔套挡构成。笔套是一套筒,在其下部外缘有上、下的穿绳孔。
申请公布号
CN2051162U
申请公布日期
1990.01.17
申请号
CN89200010.4
申请日期
1989.01.04
申请人
任世彬
发明人
任世彬
分类号
B43L11/00
主分类号
B43L11/00
代理机构
代理人
主权项
1、一种能灵活画出抛物线和双曲线的抛物双曲两用规,其结构由固定滑轨1,能分别插入固定滑轨并能自由滑动的滑动框架2和3及笔套构成,其特征是焦点板及滑动框架2的笔套档与和它们连接的框边垂直,滑动框架3的笔套档可以一端螺钉为轴转动一定范围,笔套下部外缘固定有可上,下穿出细绳的穿绳孔。
地址
河北省定兴县定兴中学
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