Alarm clock
FIG. 1 is a perspective view of a alarm clock showing my new design; 
     FIG. 2 is a front elevational view thereof; 
     FIG. 3 is a rear elevational view thereof; 
     FIG. 4 is a left side elevational view thereof; 
     FIG. 5 is a right side elevational view thereof; 
     FIG. 6 is a top view thereof; and, 
     FIG. 7 is a bottom plan view thereof. 
     The broken-line dial portions of FIGS. 1 and 2 are environmental only and form no part of the claimed design.