The ornamental design for a housing for tiltmechanism, as shown and described.
FIG. 1 is a perspective view of my housing for tilt mechanism;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof, the right side view being a mirror image of this view;
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The portion of the ladder cord rails shown in broken lines in FIGS. 1-4 and 6 are environment included to show the housing for tilt mechanism in a position of use and form no part of the claimed design. The broken lines and the area within broken lines in FIG. 3 depict environment and form no part of the claimed design.