Note that in each case there is an opposing generator or potential. In figure 2, for instance, there's a DC generator on H and H' that produces the opposition. Later diagams involve the use of moving parts in order to use the AC to generate the DC required to oppose the AC on each branch. I can't say I fully understand it from the quick browse I did, but it's not just using transformers - there is at least one other active part in each diagram. The text starts with the simple case in diagram one, and proceeds to make a more complex change in each succeeding diagram until you get to the last which, it appears, requires a rotating mechanical part, but does not require commutators, forming a rotary transformer of sorts. Interesting stuff, I just don't have the time - perhaps someone else can explain it... -Adam On Tue, Jun 5, 2012 at 11:06 PM, Mark Hanchey wrot= e: > I was reading through some of the patents of Nikola Tesla and one of > them is about converting AC to DC using transformers. The circuit > consist o two transformers. The primaries of both transformers are > connected in parallel to the AC source. =A0The secondaries are wired in > series between the two transformers =A0and from that he produces the DC > current . =A0I'm having a hard time understanding how this works to > produce a DC current. The patent application explains it as using one > force to oppose another to force the current on a specific path, but his > comments are kind of hard to understand. Would appreciate some > explanations if someone could. > > The patent is # 413,353 > http://www.google.com/patents/US413353 > The circuit is pictured in figure 2. > > Thanks > Mark Hanchey > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .