Multi-functional ruler
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United States of America Patent
Stats
-
Dec 29, 1992
Grant Date -
N/A
app pub date -
May 7, 1991
filing date -
May 17, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved multi-functional ruler is disclosed comprising a body of a ruler including an axial seat and an axial rod having convex blocks at each of its two ends attached with rollers. The convex blocks are separately connected to the interior of axial nuts. The axial nuts and the axial seats are tightly fixed together, with an axial block located at a central part of the internal lateral side of the body of the ruler. When the axial rod of the forementioned structure is set in motion, it will not cause a tremendous area of friction with the body of the ruler. It will slide smoothly without causing any position shifting of the axial rod so as to enable lines to be accurately drawn. The axial block can function as a center from which circles of different diameters can be drawn.
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Family
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Cited Art Landscape
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