Abstract: The rack assembly contains a number of vertical rail members and each rail member contains two or more column elements, a number of connection elements, and a number of fastening elements. Each column element has a number of connection grooves and sliding grooves. The connection elements are positioned between and connected to two adjacent column elements. Two vertically adjacent connection elements are locked together by a fastening element. The rack assembly allows a number of stretching members movably configured. Each stretching member contains a number of wheel elements and at least an elastic hook element. The wheel elements are embedded into the sliding grooves of a column element and the stretching members as such could slide along the column element to various positions and, by connecting the elastic hook elements to a curtain's various spots, the curtain is stretched from multiple directions.

Abstract: A width-adjustable curtain track includes a track assembly and a connection device to link to the track assembly, which, as well as connection device, can be undrawn or folded in the axial direction, to enable a curtain cloth that is attached on the connection device to extended or folded followed the connection device. Owing to the adjustable width function of the track assembly, the invention is applicable to various window frames for adjusting to required widths to further increase the convenience of curtain usage.

Abstract: An assembly for covering a swimming pool when it is not in use. A roll member is rotatably mounted at one end of the pool for rolling up and unrolling a sheet of material of dimensions for covering the pool. A scissor type extension device moves the outer end of the sheet toward the other side of the pool when unwinding. The scissor device is moved between the retracted and extended positions by a rotating screw. An electrical motor rotates the screw and the roll member. A slide track mechanism submerges the entire assembly when rolled up.

Abstract: A lazy-tongs device is formed of length-adjustably snap-connected colorless transparent or translucent plastic elements sufficiently small so as not to interfere with the folding of the drapes and so as to be substantially concealed behind the traverse rod when the controlled drapes are fully unfolded. In one disclosed species, large plastic trim rings also substantially conceal the low-visibility lazy-tong elements when the drapes are folded. In a second species the drapery supports hold the top of the drapes close to the traverse rod for substantial concealment of the lazy-tongs when fully closed.

Abstract: A traverse rod for drapes has its pleat hangers attached to elements (e.g. the spaced pivot pins) of a lazy-tong mechanism, whereby the pleats are always evenly spaced regardless of the degree of opening or closing of the drapes. The lazy-tong mechanism (1) can be housed in a rectangular guide box mounted with its longer transverse dimension either vertical or horizontal, or (2) can be attached to hangers carried and guided by a C-shaped channel bar so as to lie behind the drapes carried by the channel bar.