发明名称 |
Circular slide rule performing trigonometrical calculations - has coloured scales, square grid and pointers providing variety of mathematical functions |
摘要 |
<p>A slide-rule is used for the demonstration of mathematical functions. It consists of a square card carrying a set of circular scales and a cursor with a cruciform pointer arrangement. The slide rule may perform calculations in elementary trigonometry. The function F(X):Y = aX + b may be studied, with the function F(X) : y = c. In addition to the circular scales the slide rule card carries a rectangular grid which is of use in the trigonometrical calculations. The various scales and pointers are colour coded for ease of identification.</p> |
申请公布号 |
FR2388340(A2) |
申请公布日期 |
1978.11.17 |
申请号 |
FR19760030692 |
申请日期 |
1976.10.11 |
申请人 |
TILLIT JEAN |
发明人 |
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分类号 |
G06G1/00;(IPC1-7):06C1/00;09B19/02 |
主分类号 |
G06G1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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