We are designing a portable cart to display jewelry on at art shows. We
would like the top to hinge up, like a tackle box, with 3-4 shelves
that stair step upwards to hold small display boxes of jewelry.

Is the hinge I need to do that stair step shelving a "Knife Hinge"?

Ive google searched, and found several suppliers, but Im still kind of
unsure that knife hinges are what I need..........any ideas??

Thanks
Steve @ Crations by Black Hawk
(fledgling woodworker)