where and describe the rotation of the first and second gears respectively. This equation can be formally solved as: where is a constant of integration. References Further reading Noncircular Gears: Design and Generation by Faydor L. Litvin, Alfonso Fuentes-Aznar, Ignacio Gonzalez-Perez, and Kenichi Hayasaka External links Historic Video of Non-Circular Gears on YouTube The Eye of an Artist Kinematic Models for Design Digital Library (KMODDL) Laczik- Involute Profile of Non-Circular Gears "Gear geometry and applied theory" by Faydor L. Litvin and Alfonso Fuentes A paper on designing of non-circular gears Maurice Lacroix Masterpiece Regulateur Roue Carree. Squaring the Circle. Gears