Abstract: A screw shaft for a motor operator is pivotally secured at each end by a bearing insert, with each bearing insert fitting within a channel defined within opposing walls of the housing.

Abstract: A screw shaft for a motor operator is pivotally secured at each end by a bearing insert, with each bearing insert fitting within a channel defined within opposing walls of the housing.

Abstract: A sliding cover plate for the adjustment screws of a circuit breaker is slidably mounted on the housing of a motor operator. The sliding adjustment plate includes snap-in tabs for engaging slots within the motor operator housing, permitting the cover to be snapped in place, and then slidably moved between a position wherein the adjustment screws are covered, and a position wherein the adjustment screws are exposed. The cover may be secured in the position wherein the adjustment screws are covered. The cover includes a first portion defining apertures corresponding to two adjustment screws, and a third, detachable portion defining an aperture for a third adjustment screw, thereby permitting the cover plate to be utilized with both three-pole and four-pole circuit breakers.

Abstract: An actuator mechanism, for a circuit breaker having an operating handle, which includes a slider assembly and a mounting plate assembly. The slider assembly has a rigid, generally planar member with at least one notch. The mounting plate assembly has at least two generally parallel, spaced flanges and is structured to mount on the circuit breaker housing. One of the at least two flanges is structured to cooperate with the notch to allow the slider assembly to be slidably coupled to the mounting plate between the at least two flanges.