An actuating mechanism is taught that is used for externally operating a mini-blind or a shade in a sealed double glazed window which includes a window frame with a side opening and a roll box in alignment with the side opening. In one preferred form, the top wall is formed from a first portion having a generally oval shaped access opening closed by a generally oval shaped closure portion interconnected by a wet adhesive seal to the first portion. Each of the at least two sensors at least provide a bearing to the object in their respective local reference system.