or fluid filled shock absorbing element could be utilized in place of spring 32 the ball chains 12 could be shaped by balls formed on a chain or cord the balls could he spherical or non spherical for example a rectangular cylindrical stopper may be utilized fig8 illustrates another embodiment of the invention which a single control device 80 is utilized with a pair of shades not shown the control device 80 is positioned between the pair of shades and four segments of hall chains 12 are received into the control device 80 for simplicity of explanation only a single ball chain 12 is shown in fig8 the springs 32 and spring retainers 34 of control device 80 may be placed into the body 82 through openings accessible at the rear side 84 of body 82 the chain stoppers 14 engage the springs 32 through lower openings in body 82 fig9 illustrates yet another embodiment of the invention 90 where the body includes a mounting plate 92 which is generally perpendicular to a plane containing the springs 32 the mounting plate 92 would allow the control device 90 to be mounted for example within a window frame interior or window moldings depending on the application fig1 is another view of the control device 90 of fig9 showing a rear access 100 through which the spring 32 and spring retainers 34 are inserted such as during manufacture fig1 is a perspective view of another embodiment of the present invention a control device 102 include a body 113 a pair of springs 132 spring caps 134 and cap retainers 135 cap retainers 135.