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US 5,870,830 AGranted
Conic section compass
OwnerYen-Hung Wuinventor
Life of this patent
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Abstract
Conic Section Compass (CSC) is a hand-held drawing device. It applies a mathematics concept. CSC can be used to draw circles, ellipses, parabolas, hyperbolas or make surface curvatures of these types. Given a specific mathematics formula of the mentioned curves, users can draw a well defined curve with CSC (just like a compass to drawing a circle).
Claims1
A hand-held drawing device that helps users to draw circles, ellipses, parabolas, hyperbolas or make surface curvature of these types comprising:
- a guiding extension,
- an axially supporting mean having an angle fixing mean attached at one end for
- 1) enabling said guiding extension to be positioned at a desirable angle relative to said axially supporting mean,
- 2) enabling said guiding extension to rotate about said axially supporting mean at said angle,
- 3) enabling said guiding extension to slide in said angular direction during said rotation.
- a holding mean attached at the other end of said axially supporting mean for positioning said axially supporting mean at an angle relative to a drawing surface.
3 more elements
Dependencies are inferred from the claim text.