Circuit breaker including ambient compensation bimetal holding and releasing arc fault indicator

An aircraft circuit breaker comprising:

• a housing including an opening;
• separable contacts disposed in said housing;
• an operating mechanism structured to open and close said separable contacts;
• a trip mechanism structured to cooperate with said operating mechanism to trip open said operating mechanism, said trip mechanism comprising a first bimetal structured to trip open said operating mechanism responsive to a thermal fault, a second ambient compensation bimetal structured to compensate said first bimetal, and an arc fault trip circuit structured to trip open said operating mechanism responsive to an arc fault;
• an indicator comprising an indicator portion and a leg disposed from said indicator portion;
• and
• a bias mechanism structured to bias said indicator,
• wherein the second ambient compensation bimetal is normally structured to hold the leg of said indicator, thereby holding said indicator against the bias of said bias mechanism, and
• wherein the second ambient compensation bimetal is also structured to release the leg of said indicator responsive to said arc fault trip circuit and said arc fault, thereby releasing said indicator to the bias of said bias mechanism.