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    • 37. 发明授权
    • Circle compass
    • 圆指南针
    • US5630278A
    • 1997-05-20
    • US412049
    • 1995-03-28
    • Bruce Stoneberg
    • Bruce Stoneberg
    • B43L9/16B43L9/20
    • B43L9/16
    • A device for forming circles that includes a first member which is rotatably attached to a second member. The first and second members include a first peripheral section and a second peripheral section, with one of the sections being arcuate. The first peripheral section of the first member is generally opposite the second peripheral section of the second member and the first peripheral section of the second member is generally opposite the second peripheral section of the first member. In one embodiment, the first peripheral section is arcuately curved and the second peripheral section is tapered. In another embodiment, the first peripheral section is arcuately curved and tapered and the second peripheral section is generally flat. Marking means are removably secured between the opposing sections of the first and second members.
    • 一种用于形成圆形的装置,包括可旋转地附接到第二构件的第一构件。 第一和第二构件包括第一周边部分和第二周边部分,其中一个部分是弓形的。 第一构件的第一周边部分大致与第二构件的第二周边部分相对,并且第二构件的第一周边部分大体上与第一构件的第二周边部分相对。 在一个实施例中,第一周边部分是弧形弯曲的并且第二周边部分是锥形的。 在另一个实施例中,第一周边部分是弧形弯曲的并且是锥形的,而第二周边部分基本上是平的。 标记装置可拆卸地固定在第一和第二构件的相对部分之间。