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Old 07-18-2016, 01:41 AM
thx1138 thx1138 is offline
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Join Date: Jan 2012
Posts: 371
Originally Posted by Ernst View Post
Tesla mostly used AC. In his time there were no diodes. But in his more advanced work he used a commutator to change it into DC.
Tesla had several patents for circuit controllers that used mercury. It turns out that a pool of mercury only allows current to travel in one direction and it can handle quite high voltages and currents - powers ranging from kilowatts up to a few megawatts, at voltages ranging from 110V to 30KV. They have been used up until very recently in high power radio stations. They may still be in use but I'm not sure about that.
Mercury Arc Rectifier

Two of the seven Tesla patents that I found:
TESLA PATENT 611,719 - 1897
TESLA PATENT 613,735 - 1898
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