Yes, you could in theory make a "silver sorting" machine based on the same principle as a Ryedale or similar machines. But quite honestly it would be a lot of expense for very little profit. When it comes down to it, it is just as easy to rim check with a sound check than it is to build/buy a machine to do it for you. The reason why Ryedale and similar sorters are popular for pennies is because there isn't an easy way to check for copper pennies other than date checking them (and then weighing the '82s) which is really time consuming for how little each individual coin is worth. On the other hand, rim checking quarters and dimes are both incredibly easy, if you don't see a copper band, you need to check it to see if it is silver. When you are done with a roll do a sound check to make sure you don't miss anything. Even rim checking halves is rather easy (though some 40%ers do look identical to clad so you need to be diligent about the sound check).
So while you could make a silver sorting machine, it just wouldn't be practical unless you run a coinstar-type business.