FIG. 1 is a perspective view of a dimmer switch according to a first embodiment of our new design.

FIG. 2 is a front view thereof.

FIG. 3 is a left side view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is a top view thereof.

FIG. 6 is a bottom view thereof.

FIG. 7 is a perspective view of a dimmer switch according to a second embodiment of our new design.

FIG. 8 is a front view thereof.

FIG. 9 is a left side view thereof.

FIG. 10 is a right side view thereof.

FIG. 11 is a top view thereof.

FIG. 12 is a bottom view thereof.

FIG. 13 is a perspective view of a dimmer switch according to a third embodiment of our new design.

FIG. 14 is a front view thereof.

FIG. 15 is a left side view thereof.

FIG. 16 is a right side view thereof.

FIG. 17 is a top view thereof.

FIG. 18 is a bottom view thereof.

FIG. 19 is a perspective view of a dimmer switch according to a fourth embodiment of our new design.

FIG. 20 is a front view thereof.

FIG. 21 is a left side view thereof.

FIG. 22 is a right side view thereof.

FIG. 23 is a top view thereof; and,

FIG. 24 is a bottom view thereof.

The rear view of each of the foregoing embodiments contains no ornamentality and, therefore, has been omitted.

The portions of the drawings appearing in broken line are for environment only and do not form a part of the design.