Smoke alarm

FIG. 1 is a first perspective view of a smoke alarm, showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of the selected portion 9 in FIG. 3 .

The broken lines shown in the drawings depict portions of the smoke alarm that form no part of the claimed design.

The additional dot-dash broken lines are for the purpose of showing enlarged areas and form no part of the claimed design.