Threshold

Claim 1

IN A THRESHOLD ASSEMBLY OF THE TYPE INCLUDING AN ELONGATED GENERALLY ARCH-SHAPED RIGID PLATE MEMBER HAVING A PAIR OF LATERALLY SPACED APPROACH SURFACES INCLINED DOWNWARDLY AND OUTWARDLY FROM A CENTRALLY LOCATED RECESSED PORTION, AND AN UPWARDLY DIRECTED BOWED SEALING GASKET RECEIVED IN THE RECESSED PORTION, THE IMPROVEMENT WHICH COMPRISES, TWO FLEXIBLE OUTER SHEATHING STRIPS SECURED TO SAID PLATE MEMBER IN SUBSTANTIAL CO-EXTENSIVE CONTACT WITH RESPECTIVE APPROACH SURFACES FOR COVERING THE LATTER, EACH OF SAID SHEATHING STRIPS HAVING A LONGITUDINALLY EXTENDING EDGE PORTION ADJACENT THE OUTER EDGE PORTION OF ITS RESPECTIVE APPROACH SURFACE DOUBLED BACK AGAINST THE UNDERSIDE OF SAID OUTER EDGE PORTION AND BEING PROVIDED WITH A MARGINAL EXTENSION WHICH EXTENDS UPWARDLY, INWARDLY AND THEN DOWNWARDLY A RELATIVELY SHORT DISTANCE BELOW SAID OUTER EDGE PORTION, WHEREBY WHEN THE RIGID PLATE MEMBER IS CLAMPED AGAINST A FLOOR SURFACE SAID MARGINAL EXTENSIONS ARE YIELDABLY ENGAGEABLE WITH THE SAME.