Abstract: A toggle link apparatus for a circuit breaker. The toggle link apparatus has an open-slotted end including a pivot feature and a stop feature opposite the pivot feature that limits motion of a connected cradle upon a tripping event. Toggle link assemblies of a circuit breaker, trip mechanism assemblies, and method of operating a trip mechanism of a circuit breaker are also provided, as are other aspects.

Abstract: An arc extinguishing assembly for a circuit breaker or switch. The arc extinguishing assembly includes an arc chamber having an arc chamber width (b) adjacent to a contact arm tip of a contact arm, stacked arc plates located at a forward end of the arc chamber adjacent to the contact arm tip, and first and second fin features located at the forward end between the arc plates and the contact arm tip. The first fin feature including a first inner edge and the second fin feature including a second inner edge, wherein the first inner edge and the second inner edge are spaced apart from one another by a spacing distance (a), wherein a venturi ratio of a/b is equal to or less than 0.6. Contact assemblies for circuit breakers, arc chute assemblies, and methods of extinguishing and arc are disclosed, as are other aspects.

Abstract: The present invention relates generally to a rotary handle. More particularly, the invention encompasses a deliberate action rotary handle. The invention further includes an extended drive-plate deliberate action rotary handle, such that to turn on a component, such as, a circuit breaker, requires a deliberate manual action by the user. If a deliberate action is not taken by a user but the handle is accidentally pushed then the handle does not engage with a drive shaft and the handle moves to an outer edge of a drive plate thus preventing the engagement of the handle with the other components to turn on the component.

Abstract: The present invention relates generally to a rotary handle. More particularly, the invention encompasses an improved support bracket for a deliberate action rotary handle. The invention further includes an improved support bracket to support an extended drive-plate deliberate action rotary handle, such that to turn on a component, such as, a circuit breaker, requires a deliberate manual action by the user. If a deliberate action is not taken by a user but the handle is accidentally pushed then the handle does not engage with a drive shaft and the handle moves to an outer edge of a drive plate thus preventing the engagement of the handle with the other components to turn on the component.

Abstract: The present invention relates generally to a rotary handle. More particularly, the invention encompasses an improved support bracket for a deliberate action rotary handle. The invention further includes an improved support bracket to support an extended drive-plate deliberate action rotary handle, such that to turn on a component, such as, a circuit breaker, requires a deliberate manual action by the user. If a deliberate action is not taken by a user but the handle is accidentally pushed then the handle does not engage with a drive shaft and the handle moves to an outer edge of a drive plate thus preventing the engagement of the handle with the other components to turn on the component.

Abstract: The present invention relates Generally to a rotary handle. More particularly, the invention encompasses a deliberate action rotary handle. The invention further includes an extended drive-plate deliberate action rotary handle, such that to turn on a component, such as, a circuit breaker, requires a deliberate manual action by the user. If a deliberate action is not taken by a user but the handle is accidentally pushed then the handle does not engage with a drive shaft and the handle moves to an outer edge of a drive plate thus preventing the engagement of the handle with the other components to turn on the component.

Abstract: A circuit breaker (10) including an electrical arc extinguishing apparatus (105). The electric arc extinguishing arc apparatus (105) includes a first sidewall (106) in a spaced relationship with the second sidewall (107) with a top arc plate (110) mounted between the first and second sidewalls (106, 107). A plurality of intermediate arc plates (114) are mounted between the first (106) and second sidewalls (107) below the top arc plate (110) with each in a spaced apart relationship. A bottom arc plate (116) is mounted between the first and second sidewalls below and apart from the intermediate plates (114) forming an arc chute. The electric arc extinguishing apparatus (105) can also be provided with two end caps (120) with each end cap (120) having an interior cavity (121) with one leg (111) of each arc plate (58) mounted in the cavity (121) of one end cap (120) and the other leg (111) of each arc plate (58) mounted in the cavity (121) of the other end cap (120).