I have.
Couple of years ago, went through the process of applying for a patent for a technique for printing on a "3D" surface.
We hired an engineer to guide us through the process. There are people who are specialized in this. It is very complex. It's not just a question of having a sketch, there is a lot of text that needs to be written and it has to be written correctly.
first, you need to check if your idea is not already patended. Check the U.S. Patent website (Google it, I don't remember). You can access all the U.S. Patents there. You'd be suprised as how many "ideas" get patents and never see the light of day.
I'm pretty sure you don't want to share your ideas with us at this point. And your right to do so. So my advice to you is contact someone who specializes in this, for it's not just an engineering thing, it's very much a "legal" thing also.
As far has having a prototype built, I'm sure there are machine shops in your area. But before you send them drawings, you need to have them sign a contract where they promise to keep your idea secret and so on. So again, before you do anything, consult with a specialist!
Good luck.
