BRIEF DESCRIPTION OF THE DRAWING
A better understanding of the present invention will be had upon reference to the following detailed description, when read in conjunction with the accompanying drawing, wherein like reference characters refer to like parts throughout the several views, and in which:
FIG. 1 is an elevational view illustrating a preferred embodiment of the present invention;
FIG. 2 is an enlarged fragmentary plan view;
FIG. 3 is an exploded fragmentary elevational view;
FIG. 4 is a sectional view taken substantially along line 4-4 in FIG. 2 and enlarged for clarity; and
FIGS. 5A and 5B are diagrammatic views illustrating the operation of the present invention.