Abstract: A timepiece or wristwatch displays celestial “complications” and meteorological events based upon calculations and conditions relevant to the geographic location of the timepiece. A memory storage device, microprocessor, mechanical and software controlled graphical display systems and network connectivity facilitate the input of user selected complications, display options, geographic arguments and other variables. The timepiece is not limited to a preprogramed geographic area or to predefined complications.

Abstract: A screening apparatus has a screening surface comprising at least one group of elongate, mutually parallel and mutually adjacent screening elements, the size of the mesh defined by adjacent elements being varied by moving the elements of one and the same group transversally of their longitudinal axes while maintaining an equal distance between all said elements. Each screening element of a particular group of said elements is mounted on an associated arm arrangement which can be swung about an axis extending parallel to the long axis of an associated screening element. Planes containing the pivot axis of a respective arm arrangement and the longitudinal axis of its associated screening element are parallel to one another while the distance between said axes decreases from arm arrangement to arm arrangement in direct proportion to the distance between the pivot axes of the arm arrangements.