This is general concept of an autoumated observation deck which one might fit into a larger model.  The idea
for this model started off with the part 32291 'Technic Axle Joiner Perpendicular Double'. To me this part
(clear) looked like a pair of goggles or some sort of viewing scope. I thought it would be neat to have these
"goggles or scope" twisted downward in a spiral type curve into postion over an operator's seat.  Then I added
the idea of bringing in the seat at the same time as the scope dropped down.  From this idea I built the model
which I think achieves the motion I wanted.  There is some room for improvement on the basic design; the two
bevel gears on top are slightly loose and the position of the seat and scope when meeting are slightly off
90 degrees.  There is also room to expand the idea like having the scope follow an additional circular path
possible on another gear around the 40 tooth gear or having some portion of the deck raise up like thru a
whole in the base.