Abstract: The invention relates to a mechanism for converting a rotary motion originating from a rotary energy generator (1) into a longitudinal motion of a carriage (25) that is adapted for attachment to a covering, such that said rotary motion will result in a longitudinal displacement of the covering, the mechanism comprising one or more spindle sections (2, 3, 4, 5) drivingly connected at a longitudinal end of at least one of said spindle sections via a gear means (7; 9; 22, 23, 24, 27) to said rotary energy generator (1). The invention further relates to a drive system for coverings comprising mechanisms according to the invention. The invention further relates to a covering system for covering a surface portion such as a window, glass door or the like, of a building.

Abstract: The invention relates lift and tilt mechanisms for Venetian blinds typically, although not exclusively, comprising slats of very large dimensions, both relating to the width of the slats and to the longitudinal extension of the slats. Thus the venetian blind comprising these slats can be made to cover very large window openings or other parts of buildings and rooms. Both from a functional and from an aestethical point of view a precise and reliable raising and lowering of the slats of the Venetian blind as well as the tilting of the slats is very important. The present invention provides improved mechanisms for attaining these characteristics.

Abstract: The invention relates to slats (1) for a venetian blind comprising slats of very large dimensions, both relating to the width of the slats and to the longitudinal extension of the slats (1). Thus the venetian blind comprising these slats can be made to cover very large window openings or other parts of buildings and rooms. The slats (1) are provided with longitudinal edge portions (3) serving the dual purpose of increasing the overall rigidity of the slats (1) and of providing attachment means (12) for support cords of the slats (1). The slats are operated by pairs (typically two) of lift and tilt cords running in parallel along the longitudinal edges of the slats (1), thereby avoiding passages through the slats (1), which is advantageous both from an aestetical point of view and from the point of view of the necessary production technique for the slats (1). The invention also relates to releasable attachment means (12) for connection the slats (1) to the tilt cords of the venetian blind.