Dayton, Ohio  —  Howard Patterson stood outside the Wright Cycle Company — part of the national park complex dedicated to the aviation pioneers who honed their mechanical skills repairing bicycles in Dayton — on Friday, and found locked doors with a sign taped to the window. “Due to the current lapse in federal government appropriations this site is closed to the public,” the sign said. Orville and Wilbur Wrights' bicycle shop, the Wright Cycle Company, in Dayton, Ohio, 1937. The site is now