Abstract: A passive pool skimmer has a T-shaped buoyant stabilizer end and a flexible strap which provides a readily displaceable structure that removes debris from the surface of a pool. The pool skimmer includes a rectangular frame having a net attached thereto in the configuration of a rectangular pouch. At one end of the frame, two floats are attached to the ends of a T-shaped structure. The floats rest against the side of the pool and, in combination with a float at the opposite end of the frame, provides sufficient buoyancy to substantially center the opening of the frame at the water level. A flexible strap with a quick disconnect is attached to the skimmer and allows relative motion of the pool skimmer.

Abstract: A ceiling has elongated suspension members that attach to ceiling joists or structure and an interlocking tile mechanism. The individual tiles are provided with opposed side walls having mating interlock features for aligning and supporting a network of suspended tiles.

Abstract: A trackless drop ceiling has elongated suspension members that attach to ceiling joists or structure and an interlocking tile mechanism. The individual tiles are provided with opposed side walls having mating interlock features for aligning and supporting a network of suspended tiles.