Method and apparatus of extending and retracting swimming pool covers

DETAILED DESCRIPTION An apparatus of the instant invention includes a motor having a drive shaft associated therewith.
At least one cable collecting reel is mounted on the drive shaft to be free wheeling thereon.
A cover collecting drum is also mounted on the drive shaft to be free wheeling thereon.
An intercooperation means is adapted to the drive shaft to permit the driving engagement of the drive shaft with the cable collecting reel in one condition and the driving engagement of the drive shaft with the cover collecting drum in a second condition.
These components together constitute a drive assembly.
A cover is secured at its first end to the cover collecting drum.
The cover is preferably manufactured of a material which is buoyant when placed in water.
In preferred constructions, the drive assembly is positioned elevationally above a first end of the pool at a location which minimizes the opportunity of its being contacted by a pool user.
Due to this positioning of drive assembly, and recognizing the considerable weight of the fabric to be positioned over the pool, it is crucial that the buoyant forces created by the interaction of the cover and the water be brought into application on the cover as soon as possible during the extension of the cover over the pool.
A cable, e.
g.
a rope, is secured on its first end to the cable collecting reel.
The cable is directed to a pulley means positioned proximate the opposing second end of the pool.
The cable is trained about the pulley means and is then directed to its securement to the second end of the cover.
The portion of the cable which extends between the pulley means and the second end of the cover is denominated the "return run" of the cable.
The portion of the cable which extends from the reel to the pulley means is called the "outward run".
The cable is extended outwardly away from the reel run.
In some embodiments, the "outward run" of the cable may be positioned over the pool at an elevation well above the anticipated height of any user of the pool