Operating mechanism for circuit breakers

A circuit breaker comprising an operating mechanism, the operating mechanism comprising:

• a housing;
• a cam element positioned within the housing, wherein the cam element is installed on a mechanically driven first shaft;
• a transmission lever provided with a first roller element, wherein the transmission lever is installed on a second shaft such that the second shaft is parallel to the first shaft;
• and
• a support assembly coupled to an inner surface of a vertical wall of the housing, wherein the support assembly comprises:
• a fork joint having a moveable end and a pivoted end, with the moveable end is to support a second roller element;
• and
• a damper element having a first end and a second end, wherein the first end of the damper element is rigidly pivoted on an upper horizontal surface of the housing of the circuit breaker, and the second end of the damper element is coupled to the moveable end of the fork joint.

A method implemented by an operating mechanism of a circuit breaker, the method comprising:

• rotating a cam element to interact with a first roller element to cause rotation of a transmission lever to close the circuit breaker, wherein
• the cam element is positioned within a housing of the operating mechanism and installed on a mechanically driven first shaft, and
• the transmission lever is provided with the first roller element, wherein the transmission lever is installed on a second shaft that is parallel to the first shaft;
• and
• rotating the cam element further to cause the cam element to move away from the first roller element and to engage with a second roller element on a fork joint of a support assembly to initiate a closing damper stroke, wherein
• the support assembly is coupled to an inner surface of a vertical wall of the housing, the support assembly comprising:
• the fork joint having a moveable end and a pivoted end, where the moveable end is to support the second roller element;
• and
• a damper element having a first end and a second end, wherein the first end of the damper element is rigidly pivoted on an upper horizontal surface of the housing, and the second end of the damper element is coupled to the moveable end of the fork joint, and wherein the damper element provides the closing damper stroke.