Mike Haasl wrote:One thought would be to use two bows facing away from each other so they form a () shape. Then you could get twice the movement with the same maximum amount of stress on the bow(s).
I don't think I'm understanding what you mean. The bow would start straight or slightly flexed, just
enough pressure to keep the latch stays out. Then the handle cranks the latch, loading the bow but only traveling an inch or two. Just enough for the latch to clear the door jamb. I think the distance of travel can be better modified by increasing or decreasing the size of the diameter of the gear.