Arturo Caprotti Steam Motor Locomotive Engine (Italy)

Never heard of Caprotti before (August 2012), but his name was mentioned by my Italian Agent Andrea Ridolfi when I informed him about the Dabeg 221 TQ locomotive Steam Engine.
When searching his patents I found a system that seemed to be desmodromic (Group 1 A coulisse desmo).
Still not known to me what kind of Caprotti valve control(s) is (are) used in the Italian locomotives.

Added May 2013 on Espacenet: http://nl.espacenet.com/ two Russian Patents :
SU11205 (A1) published 1929-09-30 and
SU35701 (A1) published 1934-03-31
Patented Systems

Video on you tube from a model of the Caprotti system: http://www.vxv.com/video/8qeKFPyMwOlQ/distribuzione-caprotti-in-funzione.html
This model is an artefact in the collection of the museum Fermodellistico G. Capelletti in citta di Castello Italy.
[Classication = Group 1A]

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