Abstract: A hand-held and hand-manipulated tool adapted to hook or unhook an extension type of helical spring, such as a trampoline spring, to or from an anchoring structure, such as the frame of a trampoline, is preferably formed as a unitary elongate lever of the second kind from steel bar stock advantageously having a rectangular cross section, the end of the lever being adapted to rest on the surface of the spring as a fulcrum, the opposite end portion providing the power arm of the lever and having a handle member formed at its free end transversely of the lever, and a work arm depending from between the power arm and the fulcrum adjacent to the fulcrum and formed to receive and hold the unanchored loop, hook, or eye end of the spring, whose other end is anchored to supporting structure, such as the grommeted margin of the trampoline jump sheet.

Abstract: For sequentially dispensing individual closed loops of a narrow, easily tied, flexible material, such as dental floss, a chain having such closed loops as respective links thereof is made up by pressing a loop length of the flexible material into substantially rectilinear formation, loosely forming a knot in an end thereof, inserting a loop end of another so-pressed loop length into the loosely formed knot of the first loop length, tightening the knot to provide a slip-free-until-pulled-to-separate-loops joinder between the thus formed loop links and repeating this with additional loop lengths at either or both ends of the first-joined loop length until a chain of desired length is formed. Individual loop links are dispensed by grasping a terminal loop link of the chain and pulling it free of the chain while holding the knot that embraces the unknotted end of the next loop link of the chain.