Cast aluminum and wood (painted) on a vertical panel.
For educational use only. All rights reserved by the contributor(s) and publisher(s).
This combination of gears is unusual and the only known application was in a dough-mixing machine. The action is identical with two plain spur gears of same diameter. Close observation will show that the teeth are cut parallel with the shafts and all are the same distance from their respective centers. Take a diagonal slice from a great length of a spur gear, and the result is a swash plate gear.
[Virginia Downward & William M. Clark, 1930]