Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 650
perfectly cut spiral gears^ usually made 10 to 1.These gear wheels are made of solid cast steely or of castiron with steel rims pressed on. The teeth in two rowsare set at an angle of 90° to each other. This arrange-ment insures smooth running and at the same time checksany tendency of the fehaft… … Fig. 269 of the various members, and especially the reducing gears,may be had by reference to Pig. 271, which shows a 110 €3b Steam Engineering
