Patent for a simple, efficient, and high pressure quick speed steam-engine that maximizes power with the minimum amount of steam.

Patent for a governor meant to be used with a double cylinder single-action steam engine of Devoissaud's invention. It has "a plate-like governor valve having suitable steam ports, is introduced within a vertical channel formed in the single head plat that closes one end of two steam cylinders, which are located in the same vertical plane on a bed-plate; said valve being directly attached to, and controlled by the governor, for the alternate introduction of steam directly through the cylinder head into the two cylinders, for the actuation of working parts of the steam engine" (lines 17-27).