Patent ID: 7304561

Claim:
An enclosed protector having a housing formed by a base and a cover, a generally elongated recess formed in the base and defined by side walls of the base, the recess having opposed first and second ends, a first terminal mounted at one opposed end, the first terminal having a generally flat contact mounting portion disposed within the recess, the first terminal extending through an opening in a wall of the housing, a stationary contact mounted on the mounting portion of the first terminal, an elongated movable contact arm having first and second ends, a second terminal mounted on the base, an electrically conductive movable contact arm mounting platform electrically connected to the second terminal is disposed at the second end of the recess, the second end of the movable contact arm being electrically connected to the platform, a movable contact mounted on the first end of the movable contact arm and arranged to move into and out of engagement with the stationary contact, a thermostat metal element positioned in the recess and arranged to move the movable contact arm at preselected thermal conditions and in turn move the movable contact out of engagement with the stationary contact, the base formed with a terminal receiving ledge adjacent the first end of the recess, an electrically conductive portion received on the terminal receiving ledge and being electrically connected to the second terminal, a cover received over the base, wherein the improvement comprising a side wall on the cover having spaced apart wall portions received on the first terminal closely adjacent to the stationary and movable contacts forming a first multiple wall barrier to limit travel of arcing from the contacts, the side wall of the cover having additional spaced apart wall portions along the perimeter of the base at the first end of the recess adjacent to the terminal receiving ledge forming a second multiple wall barrier to limit travel of arcing from the contacts.