General Spatial Involute Gearing Author:Jack Phillips The theory of planar involute action is generalized here and applied to design and machine-cutting of numerous spatial gearing. The monograph thus solves a problem open for 150 years. Oblique involute hypoids, offset worms, skew helicals, bevels and ordinary spur gears are each solvable by the theory. A fundamental law, not only for involute, bu... more »t for all kinds of gearing, is proven and elucidated. The skew involute gearing introduced and explained in this book involves straight-line paths of both points of contact, constant angular velocity ratio, absence of any built-in transmission error, the non-importance of all minor errors by assembly, toleration of the flexing of an elastic gear box, and ample opportunity to avoid inadequate load bearing and lubrication. It is shown that the continuous screw motion of an imaginary straight-sided rack that generates contemporaneously both flanks of the general spatial involute teeth, can be readily translated into practice.« less