Theory of Machine
The contact ratio is given by

(Length of the arc of approach)/cosφ
(Length of the arc of contact)/(Circular pitch)
(Length of the path of approach)/(Circular pitch)
(Length of path of recess)/(Circular pitch)

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Theory of Machine
The sense of Coriolis component 2 ωv is same as that of the relative velocity vector v rotated at

45° in the direction opposite to the rotation of the link containing the path
90° in the direction of rotation of the link containing the path
45° in the direction of rotation of the link containing the path
180° in the direction opposite to the rotation of the link containing the path

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