Swimming pool and coping structure therefor

Claim 1

COPING MEANS FOR AN OUTDOOR SWIMMING POOL HAVING SIDE WALLS TERMINATING IN AN UPPER EDGE HAVING A WOODEN RECTANGULAR HEADER PLANK SUPPORTED HORIZONTALLY AND EX TENDING LONGITUDINALLY THEREALONG AND LINED WITH FLEXIBLE SHEET PLASTIC MATERIAL COVERING SAID SIDE WALLS TO RENDER THE SAME WATERPROOF, SAID COPING MEANS COMPRISING IN COMBINATION, ELONGATED UNIFORMLY SHAPED SECTIONS OF RIGID MATERIAL OF RELATIVE UNIFORM THICKNESS ARRANGED IN END-TO-END ABUTTING RELATIONSHIP AND HAVING AN UPPER SURFACE WHICH IS EXTERIOR IN USE AND AN OPPOSITE INNER SURFACE ADAPTED TO BE POSITIONED IN OVERLYING RELATIONSHIP WITH SAID HEADER IN USE, THE INTERMEDIATE PORTION OF SAID COPING BEING SUBSTANTIALLY FLAT AND THE OPPOSITE EDGES BEING CURVED DOWNWARDLY BELOW SAID INTERMEDIATE PORTION ONE OF SAID EDGES EXTENDING BELOW SAID INTERMEDIATE PORTION A GREATER EXTENT THAN THE OTHER, AND SAID EDGES BEING ADAPTED TO BE ENGAGEABLE RESPECTIVELY WITH THE UPPER SURFACE OF SAID HEADER AND OVERLYING THE UPPER EDGE OF THE SIDE WALL OF SAID POOL, A PAIR OF PARALLEL RIB MEANS DEPENDING SUBSTANTIALLY PERPENDICULARLY FROM SAID INNER SURFACE OF SAID INTERMEDIATE PORTION OF SAID COPING SECTIONS IN TRANSVERSELY SPACED RELATIONSHIP TO EACH OTHER AND TO THE OPPOSITE EDGES OF SAID COPING MEANS, SECURING MEANS ADAPTED TO BE CONNECTED TO THE UPPER SURFACE OF SAID HEADER, AND SNAP-ACTING FASTENING MEANS COMPRISING TWO INTERENGAGED MEMBERS EXTENDING LONGITUDINALLY AND BEING RESPECTIVELY CONNECTED TO SAID SECURING MEANS AND THE TERMINAL EDGES OF SAID RIB MEANS AND SPACED FROM SAID INTERMEDIATE PORTION OF SAID COPING, WHEREBY IN THE USE THE INNER SURFACE OF SAID COPING IS SPACED ABOVE SAID HEADER, ONE OF SAID INTERENGAGED MEMBERS BEING HEADED AND THE OTHER HAVING A LONGITUDINALLY EXTENDING UNDERCUT RECESS AND ONE OF SAID INTERENGAGED MEMBERS BEING YIELDABLE TO PERMIT LOCKING RECEPTION OF SAID HEADED INTERENGAGED MEMBER WITHIN SAID RECESS.