I would like to you to model the attach image. You can download and use the bevel gears model found from http://grabcad.com/library/bevel-gears
You will need to model an the image found from the image I uploaded. The A is a handle which will rotate the gears in 90 degree. Please attach a spring anywhere so that the handle A will return from the original state. Originally, handle A is position parallel to the base of the bevel gears. The handle A, when applied force will position perpendicular to the base of the bevel gears. When the force acted on the handle A is removed, the handle A will return to the original stage. Use any design you wish.
If you have questions further, please ask. If you dont have, please bid the amount for this project.