A knob assembly includes a first housing with a sidewall extending from a base and a retention member inwardly extends from the sidewall. An operable second housing includes a selective stopper selectively movable between a first position and a second position relative to the retention member. The operable second housing is further axially operable between a compressed position and an extended position relative to the first housing, and the operable second housing includes a biasing member.

A safety switch includes an actuator that has a first possible actuator position and a second possible actuator position and a blocker that has a first possible blocker position and a second possible blocker position. The first possible blocker position overlaps with the second possible actuator position. The safety switch includes a device for generating an electrical signal representative of a current position of the actuator. When the actuator is in the first possible actuator position and the blocker is in the first possible blocker position, the blocker prevents movement of the actuator from the first possible actuator position to the second possible actuator position without first moving the blocker from the first possible blocker position to the second possible blocker position.

A circuit breaker includes a vacuum interrupter having a closed position and an open position. The circuit breaker includes a linkage operatively coupled to and extending from the vacuum interrupter and a high-speed actuator operatively connected to the linkage. The high-speed actuator is operable to move the linkage by a repulsion force and cause the vacuum interrupter to move to the open position. The circuit breaker includes a decelerator with an integrated latch assembly operatively coupled to the high-speed actuator. The decelerator decelerates the repulsion force of the high-speed actuator and latches the actuator with the integrated latch assembly to maintain the vacuum interrupter in the open position.

A circuit breaker includes a vacuum interrupter having a closed position and an open position. The circuit breaker includes a linkage operatively coupled to and extending from the vacuum interrupter and a high-speed actuator operatively connected to the linkage. The high-speed actuator is operable to move the linkage by a repulsion force and cause the vacuum interrupter to move to the open position. The circuit breaker includes a decelerator with an integrated latch assembly operatively coupled to the high-speed actuator. The decelerator decelerates the repulsion force of the high-speed actuator and latches the actuator with the integrated latch assembly to maintain the vacuum interrupter in the open position.

An electric actuator includes a housing, an electric driving unit, an selector member being rotatable about a rotation axis and moving in a direction of the rotation axis, a position holding member and detection object provided in the selector member, a detector, an engagement groove provided on a cooperation surface inside the housing, and a biasing member biasing the selector member in the direction of the rotation axis to make the position holding member approach the cooperation surface. The engagement groove is formed so that the detection object is positioned in one of a detectable area and an undetectable area when the position holding member is engaged with the engagement groove, and the detector is configured to switch between supply and cutoff of power to the electric driving unit in accordance with whether or not the detection object is detected.

A fastening tool including a housing having a handle portion, a base for releasably mounting a power source, a nosepiece for driving fasteners into a workpiece, a magazine for feeding successive fasteners into the nosepiece, and a trigger. The trigger is configured to activate a trigger switch and initiate a fastener driving sequence. The trigger has a proximal end pivotably connected to a handle body and a distal free end adjacent to the base. The distal free end of the trigger has a curved body that extends substantially parallel to the magazine.

A clamp is provided, including: the first clamp body, provided with a first jaw; a conductive bridge mechanism, for electrically connecting to an electrode and comprising a reciprocating assembly, an elastic engaging element, and an operable portion. The elastic engaging element is provided between the reciprocating assembly and the operable portion and is independent and separated from the reciprocating assembly. The elastic engaging element can be operated to move towards the reciprocating assembly. The reciprocating assembly can be mutually engaged and positioned with the elastic engaging element. When the elastic engaging element is positioned at a third position, the reciprocating assembly can be engaged by the elastic engaging element and thus be positioned at a second position so as to allow the first jaw to be electrically connected to the electrode; when the elastic engaging element is operated and positioned at a fourth position, the reciprocating element is not stopped by the elastic engaging element and can thus be automatically positioned at the first position and not electrically connected to the first jaw.

An assembly includes an electrical switch and an elastically deformable control blade for controlling change of state of its trip member. The control blade comprises: (i) a fixing branch; (ii) an actuation branch which, in the absence of application of an actuation effort, stresses the trip member in the direction of closure of the electrical switch, and (iii) a control branch which can pivot about an axis to provoke tilting of the actuation branch against its elasticity to keep the electrical switch in an open free state. The assembly may include a locking device for locking the control blade in an initial position of delivery of the assembly. The unlocking of the control blade may be provoked automatically upon a first application of an actuation effort on the control blade.

An assembly includes an electrical switch and an elastically deformable control blade for controlling change of state of its trip member. The control blade comprises: (i) a fixing branch; (ii) an actuation branch which, in the absence of application of an actuation effort, stresses the trip member in the direction of closure of the electrical switch, and (iii) a control branch which can pivot about an axis to provoke tilting of the actuation branch against its elasticity to keep the electrical switch in an open free state. The assembly may include a locking device for locking the control blade in an initial position of delivery of the assembly. The unlocking of the control blade may be provoked automatically upon a first application of an actuation effort on the control blade.

An air compressor includes a cylinder and a piston reciprocably movable inside the cylinder, an electric motor configured to drive the pump, and a pressure switch, including a push-button for activating and deactivating the pressure switch, movable between first and second operating positions. A housing covers the pump electric motor and pressure switch. A switch, coupled to the housing and movable between first and second operating positions is configured to move the push-button such that when the switch is in the first operating position, the push-button is in the respective first position and, when the switch is in the second operating position, the push-button is free to switch between the first and the second position.