Abstract: A roller cover and mechanism of operation of a roller cover is described. The roller cover comprises a body portion and at least one track along which the body portion is adapted to move. The mechanism of operation of the roller cover comprises a winding system, and winder and a drive system for raising and lowering the track. The winding system comprises a first spindle and a second spindle and a supporting sheet. The winder comprises an arm secured substantially perpendicularly to the longitudinal axis of the first spindle. The drive system comprises an articulated arm rotatably attached at one end thereof to the track.

Abstract: A household item (12), such as a microwave oven, can be moved from a lowered storage position to a raised usable position. In the storage position the moving surface lid (14) is flat with the surrounding work surface (10) having been lowered by a manual force and held in place by a suitable catch or latching mechanism. The household item can be raised by pushing the housing slightly downwards, thus releasing the housing from its anchored position. A counterweight (15) greater than the weight of the household item is suspended by way of a wire and pulley system (1a, 1b, 1c) that in turn powers the platform and displaces the lid, on which the household item is located, upwardly.