Method and apparatus for monolithic casting of swimming pools or tanks

Claim 1

IN A MEANS FOR MONOLITHIC CASTING OF SWIMMING POOLS OR TANKS THE COMBINATION OF: AN EXCAVATED EARTHEN STRUCTURE IN AND BELOW THE SURFACE OF THE EARTH SAID EXCAVATED EARTHEN STRUCTURE HAVING EARTHEN SIDE WALLS AND AN EARTHEN BOTTOM; AN ASSEMBLY OF WALL FORMS DISPOSED INWARDLY OF AND SPACED RELATIVE TO SAID WALLS OF SAID EXCAVATED EARTHEN STRUCTURE IN THE GROUND; SAID ASSEMBLY OF WALL FORMS COMPRISING; A PLURALITY OF FORM SECTIONS; AND MEANS REMOVABLY CONNECTING SAID SECTIONS TOGETHER WHEREBY THEY MAY BE DISCONNECTED FROM EACH OTHER AND REMOVED FROM CAST CONCRETE SWIMMING POOL WALLS SUBSEQUENT TO HARDENING OF THE CONCRETE THEREOF; SUPPORT MEMBERS SUPPORTED ON THE GROUND AND DISPOSED ABOVE SAID EXCAVATED EARTHEN STRUCTURE AND SAID WALL FORMS; SAID WALL FORMS SUSPENDED FROM SAID SUPPORT MEMBERS; AND LOWER EDGES OF SAID WALL FORMS BEING THUS SUSPENDED IN SPACED RELATION WITH SAID SIDE WALLS AND SAID BOTTOM OF SAID EXCAVATED EARTHEN STRUCTURE; SAID LOWER EDGES OF SAID WALL FORMS BEING CONSIDERABLY BELOW THE SURFACE OF THE EARTH ADJACENT SAID EXCAVATED EARTHEN STRUCTURE.