Method of constructing a hyperbolic concrete shell for a water-cooling tower

Claim 1

IN A METHOD OF CONSTRUCTING A WATER-COOLING TOWER OF SUBSTANTIALLY HYPERBOLIC SHAPE, SAID TOWER HAVING AN OPEN GRILLWORK BASE FROM WHICH RISES A HYPERBOLIC SHELL HAVING A RESTRICTED NECK PORTION BETWEEN ITS TOP AND BOTTOM, THE INVENTION COMPRISING, FIRSTLY BUILDING SAID SHELL BY FORMING A SUBSTANTIALLY HYPERBOLIC SHAPED NETWORK OF A PLURALITY OF TENSION CABLES THROUGH AFFIXING THE LOWER END OF EACH SAID CABLE TO SUBSTANTIALLY THE TOP OF SAID GRILLWORK BASE AND CONNECTING THE UPPER END THEREOF TO MEANS SUPPORTED ADJACENT THE TOP OF SAID TOWER, ARRANGING A FIRST PORTION OF SAID CABLES SO THAT EACH CABLE OF SAID FIRST PORTION EXTENDS DIAGONALLY UPWARDLY FROM ITS LOWER END TOWARDS SAID MEANS IN A RIGHT-HAND DIRECTION AND IS SUBSTANTIALLY TANGENT TO SAID NECK PORTION, SAID FIRST PORTION CABLES BEING SPACED APART FROM ONE ANOTHER AND DISPOSED SUBSTANTIALLY AROUND THE TOP OF SAID BASE AND AROUND SAID MEANS, ARRANGING A SECOND PORTION OF SAID CABLES SO THAT EACH CABLE OF SAID SECOND PORTION EXTENDS DIAGONALLY UPWARDLY FROM ITS LOWER END TOWARDS SAID MEANS IN A LEFTHAND DIRECTION AND IS SUBSTANTIALLY TANGENT TO SAID NECK PORTION, SAID SECOND PORTION CABLES BEING SPACED APART FROM ONE ANOTHER AND DISPOSED SUBSTANTIALLY AROUND THE TOP OF SAID BASE AND AROUND SAID MEANS, SECONDLY SUBJECTING EACH CABLE TO A GIVEN AMOUNT OF TENSION WHICH TAKES OUT A SUBSTANTIAL AMOUNT OF SAG IN EACH CABLE BUT LEAVES MORE THAN FOUR INCHES OF SAG IN EACH SAIC CABLE AND IS LESS THAN THAT WHICH OVERLOADS SAID MEANS AND IS SUFFICIENT TO REDUCE DISTORTION OF THE SHAPE OF SAID NETWORK TO A GIVEN AMOUNT, THIRDLY ERECTING A FORM WHICH IS PARALLEL TO SAID NETWORK, FOURTHLY UTILIZING SAID FORM IN EMBEDDING SAID NETWORK IN CEMENTLIKE MATERIAL FROM SAID TOP OF SAID BASE TO SUBSTANTIALLY SAID TOP OF SAID CABLES TO PRODUCE SAID HYPERBOLIC SHELL WITH THE RESTRICTED NECK PORTION BETWEEN ITS TOP AND BOTTOM, DURING SAID EMBEDDING MAINTAINING TENSION IN SAID CABLES SUBSTANTIALLY AT SAID GIVEN AMOUNT BY DECREASING AND INCREASING TENSION IN SAID CABLES AS SAID EMBEDDING PROGRESSES FROM THE BOTTOM OF SAID NETWORK TO THE TOP THEREOF.