Automatic water refill system for swimming pool

Claim 1

IN A SWIMMING POOL, A LENGTH OF PIPE HAVING THE GENERAL SHAPE OF AN INVERTED L AND SECURED TO THE POOL SO THAT ONE SECTION OCCUPIES A GENERALLY HORIZONTAL POSITION SPACED ABOVE AND APPROXIMATELY PARALLEL WITH THE DECK OF THE POOL AND THE OTHER SECTION IS DISPOSED IN A VERTICAL POSITION LOCATED WITHIN THE CONFINES OF THE POOL SPACED FROM AND APPROXIMATELY PARALLEL WITH A SIDE WALL OF THE LATTER WHICH IS ADJACENT SAID DECK, THE ONE END OF SAID HORIZONTAL SECTION BEING CONNECTED TO THE UPPER END OF SAID VERTICAL SECTION, THE OTHER END OF SAID HORIZONTAL SECTION BEING CONNECTED WITH A MAIN-FED SERVICE PIPE AND THE LOWER END OF SAID VERTICAL SECTION BEING SUBMERGED BELOW THE WATER WITHIN THE POOL, A VALVE HOUSED IN THE HORIZONTAL SECTION, A FLOAT HOUSED ENTIRELY WITHIN THE UPRIGHT SECTION SO AS TO BE COMPLETELY CONTAINED THEREIN, OPENINGS IN THE PIPE PERMITTING FREE FLOW OF WATER BETWEEN THE POOL AND THE INTERIOR OF THE PIPE SO THAT THE FLOAT WILL RISE AND FALL WITH CHANGES IN THE WATER LEVEL OF THE POOL AND SO THAT REPLENISHING WATER WILL ISSUE FROM SAID INTERIOR INTO THE POOL UPON AN OPENING OF THE VALVE, AND AN INTERCONNECTION BETWEEN THE FLOAT AND THE VALVE ACTING TO OPEN THE LATTER FROM AN OTHERWISE CLOSED CONDITION AUTOMATICALLY AS THE FLOAT FALLS UPON A DROP OF THE WATER IN THE POOL BELOW A PREDETERMINED LEVEL.