Smoke detector
FIG. 1 is a perspective view of a smoke detector  showing our new design; 
     FIG. 2 is a top plan view thereof; 
     FIG. 3 is a bottom plan view thereof; 
     FIG. 4 is a front elevational view thereof with  the opposite side a mirror image of FIG. 4; and 
     FIG. 5 is a left end elevational view thereof with  the opposite end a mirror image of FIG. 5.