Swimming pool cleaning device

Claim 1

A SWIMMING POOL CLEANING DEVICE ADAPTED FOR SWIMMING POOLS HAVING VARIOUS SHAPES AND DIMENSIONS OF LENGTH, WIDTH, AND DEPTH, SAID DEVICE HAVING A CONVENTIONAL CLEANING HEAD WITH A LENGTH OF FLEXIBLE HOSE HAVING ONE END ATTACHED IN FLUID COMMUNICATION WITH SAID HEAD AND THE OTHER END ATTACHED IN FLUID COMMUNICATION WITH A VACUUM AIR SOURCE, COMPRISING IN COMBINATION: A PAIR OF PARALLEL RAILS REMOVABLY SECURED ALONG TWO SIDES OF THE SWIMMING POOL AND EXTENDING SUBSTANTIALLY ALONG THE ENTIRE LENGTH OF SAID POOL; CARRIER MEANS MOVABLY MOUNTED ON SAID RAILS AND CONNECTED TO SAID CLEANING HEAD TO TRANSPORT THE HEAD ALONG THE BOTTOM OF THE POOL AND IN CLEANING CONTACT THEREWITH; POWER MEANS MOUNTED ON SAID CARRIER MEANS TO CAUSE SAID CARRIER MEANS TO TRAVEL CONTINUOUSLY FROM ONE SIDE OF THE POOL TO THE OTHER BETWEEN SAID RAILS AND TO MOVE IN RELATIVELY SMALL INCREMENTS OF DISTANCE ALONG THE LENGTH OF THE POOL DURING EVERY OTHER TRAVERSE OF SAID CARRIER BETWEEN THE RAILS, WHEREBY SAID CLEANING HEAD IS TRANSPORTED BACK AND FORTH BETWEEN THE SIDES OF THE POOL AND ALONG THE ENTIRE LENGTH THEREOF WHILE IN CLEANING CONTACT WITH THE BOTTOM OF THE POOL; AND STOP MEANS MOUNTED ON SAID CARRIAGE MEANS TO CAUSE SAID POWER MEANS TO CEASE OPERATION WHEN SAID CARRIAGE MEAND PROCEEDS FROM ONE END TO THE POOL TO THE OTHER.