Abstract: A telescoping, adjustable-length rigid rod for mounting between opposing surfaces, such as the opposing interior walls of a swimming pool, for retaining a cover or the like in position is provided. An elongated tubular structure comprised of a number of telescoping tube sections biased apart by springs forms a rigid rod for compressibly mounting between opposing surfaces. The rod is provided with a locking handle which, in the locked position, expands the telescoping sections lengthwise thus forcing the ends of the rod against the opposing surfaces to prevent removal.

Abstract: A removable swimming pool cover characterized by a plastic sheet or thermal blanket which floats on the surface of the water and is retained in position by a number of telescoping, spring loaded rods which are positioned between opposing sides of the pool is provided. The telescoping rods may also be provided with a locking handle which, when in the locked position, expands the rods lengthwise thus forcing the ends of the rods against the opposing sides of the pool to prevent removal.