Propulsion Marine Engines used a variety of valve mechanisms, (Poppet, Cam, Joy, eccentric etc), and most controlled cut off , (normally in the ahead direction only, with full admission astern). The predominant valve system being Stephensons link with two eccentrics and a combination of piston and slide/Cameron valves. Non of my Marine Engineering manuals have any reference to Corliss engines.
Regards
Bob
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Hi Bob , i have found this reference from the Engineer 1868/07/03................you can find it on Graces Guide.........
regards
willy