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本溪市第二机床厂试制一种三角形计算尺,该尺适用于铆工、建筑木工、结构件工、下料工、钣金工等现场计算。可以不用三角公式计算,不查三角函数表,省略放大样。计算任意三角形(面积除外),使用方便、准确、速度快,对文化水平不高的人更为实用。三角形计算尺是根据几何作图的原理和数值移位的办法制成的。如图1所示。该尺是将三个尺板和两个量角器利用滑槽连成一体的。根据三角形已知条件,使滑槽沿尺板滑动,三个尺板便构成了理想的三角形。所求的边长、
Benxi City, the second machine tool plant trial a triangular slide rule, the ruler for riveting, construction carpentry, structural workers, cutting workers, sheet metal and other on-site calculations. Triangular formula can not be calculated, not trigonometry function table, omit amplification. Arbitrary triangles (except for area), easy to use, accurate, fast, less literate people more practical. Triangle slide rule is based on the principle of geometric mapping and numerical shift made. As shown in Figure 1. The ruler is the use of three ruler and two protractor with the chute into one. According to the known conditions of the triangle, the chute slides along the plate and the three feet form the ideal triangle. The length of the request,