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Discrimination patent issue

J

juit

Member
Some one wrote something about when discrimination was discovered and the idea was stolen from an old folk, anyone has the story? Can some one send me a pm with it please in case the ifo is too blunt
 
The VLF induction balance discriminator was invented in the late 1800's as a benchtop unit for distinguishing counterfeit coins from real ones. It relied on electromechanical principles since the vacuum tube didn't exist yet. I've read the patent and have a copy of it buried in my files somewhere, but but sorry, don't have the patent number.
 
Here some one told other story but i cant find it, i thonk the guy passed away, it was about 2 friends that metal detect and one of them aplied to his metal detectors when thre was no discrimination at that era
 
You know that soft drink and candy machines have a magnet in them to distinguish steel slugs?
 
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