Vent lock
FIG. 1 is a top plan view of a vent lock showing  my new deisgn; 
     FIG. 2 is a front elevational view thereof; 
     FIG. 3 is an end elevational view thereof; 
     FIG. 4 is an end elevational view thereof  opposite to that shown in FIG. 3; 
     FIG. 5 is a rear elevational view thereof; 
     FIG. 6 is a bottom plan view thereof; and 
     FIG. 7 is a front elevational view thereof  in an alternate position.