JPH0359897U

JPH0359897U -

Info

Publication number: JPH0359897U
Application number: JP12092889U
Authority: JP
Priority date: 1989-10-18
Filing date: 1989-10-18
Publication date: 1991-06-12

Description

[Brief explanation of the drawing]

第１図は本考案によるサイクロイド曲線描画用
定規の一実施例を示す平面図、第２ａ図ないし第
２ｄ図は普通のサイクロイド曲線の作図手順を示
す図、第３図は普通のサイクロイド曲線を示す図
、第４図は縮められたサイクロイド曲線を示す図
、第５図は引き伸ばされたサイクロイド曲線を示
す図である。１……同心円、２……放射状直線、３……動円
。 Fig. 1 is a plan view showing an embodiment of the ruler for drawing a cycloid curve according to the present invention, Figs. 2a to 2d are diagrams showing the procedure for drawing an ordinary cycloid curve, and Fig. 3 shows an ordinary cycloid curve. FIG. 4 is a diagram showing a contracted cycloid curve, and FIG. 5 is a diagram showing an expanded cycloid curve. 1...Concentric circles, 2...Radial straight lines, 3...Moving circles.

Claims

[Scope of utility model registration request]

A cycloid curve drawn on a plane by a fixed point at a distance b from the center of the moving circle, which is on the radius or an extension of a moving circle with radius a that rotates without slipping while touching a straight line, and is located at a distance b from the center of the moving circle. A drawing ruler comprising a plurality of concentric circles and radial straight lines passing through the center of the concentric circles and dividing the circumference into n equal parts, with one of the radial straight lines being the Y-axis and a scale of the distance b provided. , a cycloid curve drawing characterized in that the radial straight line perpendicular to the Y-axis is set as the X-axis, and the circumference of the dynamic circle is graduated on a scale of 1/n, and the concentric circle and the scale of the X-axis are made to coincide. Ruler for use.