USD415975S - Audible signal for an alarm unit

Info

FIG. 1 is a perspective view of an audible signal for an alarm unit showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof (of which a left side elevational view would be the a mirror image);

FIG. 7 is a cross-sectional view thereof taken on line 7--7 of FIG. 2, an internal mechanism of which is not shown; and,

FIG. 8 is a cross-sectional view thereof taken on line 8--8 of FIG. 2, an internal mechanism of which is not shown.

The ornamental design for an audible signal for an alarm unit, as shown and described.