This article was originally published with the title “New Rotary Valve for Steam Engines” inScientific American Magazine Vol. 93 No. 13(September 1905), p. 245doi:10.1038 ...

This model was filed with the application to the U.S. Patent Office for Patent Number 51,389 issued to George A. Lamb of Washington, DC on December 5, 1865. Mr. Lamb’s patent was for a rotary steam ...

This type of valve gear provides a means of rapidly cutting off the admission of steam to the cylinder of the engine at any point in the stroke of the piston. It was widely used on the engines of the ...