The ornamental design of a switchhousing, substantially as shown and described.
FIG. 1 is a top and side perspective view of a switch housing showing our
new design;
FIG. 2 is a bottom and side perspective view thereof; and
FIG. 3 is a perspective view thereof, mounted on top of an actuator housing
which is shown in broken lines for illustrative purposes only and forms no
part of the claimed design.