the first thing you need to do to have a patent pending is make clear copies of all drawings and notes you have come up with. then put it all in an envelope and mail it to yourself by certified mail. once you receive it, do not open it.
this is your proof of teh date it was designed (the postmark) so if someone tries to patent the same thing before you get your patent you can bring this sealed letter before any court and prove it was your idea first.
unfortunately i am not sure what to do after that, other than contact the US Patent office.
