. The record. y useful for certain classesof machines. It has become a common fault by writers of technical literature,in treating of circular motion, either alternating or constant, tomisuse the word shaft, when meaning axis. The fallacy ofthis, I think, will be made quite clear by the following description:Since my discovery of this new motion, I have found no less thanthirty-five standard authorities wrong in their definition of spurgears, pulleys, discs, etc. When 1 first conceived of the possibilityof such motion, in order to definitely ascertain its originality, I senta question in the f
. The record. y useful for certain classesof machines. It has become a common fault by writers of technical literature,in treating of circular motion, either alternating or constant, tomisuse the word shaft, when meaning axis. The fallacy ofthis, I think, will be made quite clear by the following description:Since my discovery of this new motion, I have found no less thanthirty-five standard authorities wrong in their definition of spurgears, pulleys, discs, etc. When 1 first conceived of the possibilityof such motion, in order to definitely ascertain its originality, I senta question in the following words to many engineers and profes-sional publications: Is it possible to drive a shaft by means ofwell-designed and cut spur gears, the driven shaft not being parallelto nor in the same plane with the driving shaft? The reply in every case was that such a proposition was absurdand utterly impossible. After that I made the model from whichthe illustrations accompanying this article were made, and then. Fig. 1. Plate A.
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