The valve ellipse, together with the Zeuner, Reuleaux, and Bilgram valve diagrams are ... to provide an elementary treatise on the kinematics of reciprocating steam engines and steam ...

This article was originally published with the title “ Improved Slide Valve for Steam Engines ” in Scientific American Magazine Vol. 13 No. 38 (May 1858), p. 304 doi:10.1038 ...

Hiroshi Hirabayashi, Yoshio Kawahara, Yoshitaka Muto, Susumu Iida, A Study of Lubrication Characteristics on Valve Stem Seals for Automobile Engines, SAE Transactions, Vol. 88, Section 2: ...