Understanding the conical curves and conic sections in engineering drawing mechanically Cams, Gear teeth and other machine components developed by using these curves. A few curves are Ellipse, Parabola, Hyperbola, Involute, Spiral, and Cycloids.

Hyperbola, Parabola, Ellipse are called conic section these are obtained by cutting a right circular cone by a plane in different positions.

**Hyperbola**

Hyperbola section is obtained by when the locus of a point passing through such a way that the ratio of its distance from a fixed point to the fixed straight line is a constant line. Cutting section is called hyperbola.

**Parabola**

Parabola section is when a cone is cut by a plane such a way that ratio of its distance from a fixed point to the fixed straight line is a constant line. Cutting section is called parabola.

**Ellipse**

Ellipse is when the cone is cut by a plane passing through the axis with a angle and cutting the slant surface of cone on the opposite sides. Cutting section is called ellipse.

## Engineering applications of the Hyperbola, Parabola, Ellipse

**Hyperbola**

Engineering application of the hyperbola is used for design of channels and large types of smoke existing drums and etc…!

**Parabola**

Engineering application of the parabola is used for machine tool structure, suspension bridges, arches, sound, light reflectors for parallel beams such as search lights and etc…!

**Ellipse**

Engineering application of the ellipse is used for making stone bridges, stuffing boxes, concrete arches, glands and reflectors are used in automobile etc…!

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