发明名称 Instrument for tracing curved figures particularly ellipses
摘要 A hand-held compass-type instrument for tracing curved figures, particularly ellipses, is described comprising a manipulatable finger-gripping element; an anchor arm pivotably mounted at one end to one end of the finger-gripping element, the opposite end of the anchor arm being adapted to be anchored to the surface on which the curved figure is to be traced; a tracing arm pivotably mounted at one end to the finger-gripping element, the opposite end of the tracing arm being adapted to trace the curved figure; and an eccentric linkage, having presettable means for presetting its eccentricity, coupled between the anchor and tracing arms for constraining the tracing arm to pivot in a presettable eccentric manner with respect to the anchor arm when the finger-gripping element is manipulated to trace the figure.
申请公布号 US4150487(A) 申请公布日期 1979.04.24
申请号 US19780908280 申请日期 1978.05.22
申请人 GRUNDMAN, AHARON P 发明人 GRUNDMAN, AHARON P
分类号 B43L11/04;(IPC1-7):B43L11/04 主分类号 B43L11/04
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