Movement 429

Animation not supported.

This browser does not support the Canvas element, required by our animation library. To view the animations, please upgrade to the latest version of Google Chrome, Firefox, or Internet Explorer.


429. Holly’s patent double-elliptical rotary engine. The two elliptical pistons geared together are operated upon by the steam entering between them, in such manner as to produce their rotary motion in opposite directions. These rotary engines can all be converted into pumps.