"Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which- Figure 1 is a perspective view looking up toward the heel portion of a shoe; Figure 2 is a longitudinal sectional view taken along line 2-2 in Figure 1; Figure 3 is a transverse sectional view taken along line 3-3 in Figur" . . . .