FIG. 1 is a top, front, right perspective view of a first embodiment thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is right side elevational view thereof, partially collapsed; the left side view being the mirror image thereof;

FIG. 4 is back elevational view thereof;

FIG. 5 is right side elevational view thereof, partially expanded;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a front right perspective view of a second embodiment thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is a right elevational view thereof, partially collapsed, the left side view being the mirror image thereof;

FIG. 11 is a back elevational view thereof;

FIG. 12 is a right side elevational view, partially expanded;

FIG. 13 is a bottom plan view thereof; and,

FIG. 14 is a front elevational view thereof.

FIGS. 1, 4, and 7 are much smaller in scale than the other figures; FIGS. 5 and 8 are a little larger; FIGS. 3, 10, 11 and 14 are still a little larger; and FIGS. 2, 6, and 12 are larger still; and FIGS. 9 and 13 are the largest in scale.