Abstract: An operating mechanism is provided for a circuit interrupter, such as a battery disconnect apparatus, including a housing and a number of stationary electrical contacts enclosed by the housing. The operating mechanism includes a cam member and a two-bar linkage member having a first bar, a second bar, and a pivot member disposed between the two bars. A movable contact assembly includes at least one movable electrical contact, and is cooperable with the cam member and two-bar linkage member to move the movable electrical contact into and out of electrical contact with the stationary electrical contacts. An actuating assembly pivots the cam member between a first position corresponding to maintaining the movable electrical contact in electrical contact with the stationary electrical contacts; and a second position corresponding to releasing the movable contact assembly in order that the movable electrical contact is movable out of electrical contact with the stationary electrical contacts.