Patent ID: 7348514

Claim:
A circuit breaker comprising: a fixed contact; a movable contact; an operating mechanism comprising a movable arm carrying said movable contact; an arc chute comprising a plurality of spaced apart arc plates including a number of first arc plates and a number of second arc plates; and a slot motor comprising: a slot motor structure disposed about said fixed and movable contacts and a portion of said movable arm, and an insulative housing at least substantially covering said slot motor structure and insulating said slot motor structure from said movable arm and said fixed and movable contacts, said insulative housing comprising a base and a pair of arms disposed from said base, wherein each of said arms includes a first portion disposed proximate said first arc plates and a second portion disposed proximate said second arc plates, wherein a space extending from said first portion of said arms, which is not occupied by said second portion of said arms, is generally occupied by part of said arc chute including a portion of said second arc plates, and wherein said second portion of said arms forms a debris shield between said second arc plates and said operating mechanism.