A method for performing a low energy pulse testing in a power distribution network that causes contacts to close and then open in about one fundamental frequency cycle of current flow time and close on a voltage waveform that produces symmetrical fault current. The method includes energizing a magnetic actuator to move the actuator against the bias of a spring to move a movable contact towards a fixed contact. The method also includes de-energizing the actuator when the movable contact makes contact with the fixed contact so as to allow the spring to move the movable contact away from the fixed contact so that the amount of time that the current conducts is about one fundamental frequency cycle of the current, where energizing the magnetic actuator occurs when an applied voltage on the switch assembly is at a peak of the voltage wave so that the current is symmetric.

A method for performing a low energy pulse testing in a power distribution network that causes contacts to close and then open in about one fundamental frequency cycle of current flow time and close on a voltage waveform that produces symmetrical fault current. The method includes energizing a magnetic actuator to move the actuator against the bias of a spring to move a movable contact towards a fixed contact. The method also includes de-energizing the actuator when the movable contact makes contact with the fixed contact so as to allow the spring to move the movable contact away from the fixed contact so that the amount of time that the current conducts is about one fundamental frequency cycle of the current, where energizing the magnetic actuator occurs when an applied voltage on the switch assembly is at a peak of the voltage wave so that the current is symmetric.

An illuminating device including a circuit board, a first light emitting member, a housing, a transparent support member, a light diffusing member, and a light guide member is provided. The first light emitting member is disposed on the top surface of the circuit board to emit light. The housing is disposed to cover the circuit board from above, and has a symbol configured to be illuminated by the light. The support member is disposed under the housing. A first surface of the support member is shaped to conform to the bottom surface of the housing and a second surface of the support member is flat. The light diffusing member has a side surface that receives the light, is fixed to the second surface of the support member, and diffuses the light toward the symbol. The light guide member guides the light to the side surface of the light diffusing member.

Electrical switch contact sets are disclosed. A disclosed example apparatus includes a movable platform having first and second contacts, where the first and second contacts electrically coupled via the movable platform, and a stationary portion having third and fourth contacts, where the movable platform is movable to bring the first and second contacts in contact with the third and fourth contacts, respectively, to simultaneously close a current path of an electrical circuit associated with the first, second, third and fourth contacts.

Electrical switch contact sets are disclosed. A disclosed example apparatus includes a movable platform having first and second contacts, where the first and second contacts electrically coupled via the movable platform, and a stationary portion having third and fourth contacts, where the movable platform is movable to bring the first and second contacts in contact with the third and fourth contacts, respectively, to simultaneously close a current path of an electrical circuit associated with the first, second, third and fourth contacts.

A magnetic proximity sensor assembly 10. The magnetic proximity sensor assembly 10 comprises a switch assembly 12 received in a blind bore 14 of a body tube 16. The switch assembly 12 comprises a magnetic assembly 18 moveable in the blind bore 14. The switch assembly 12 comprises an operator 42 which extends from the magnetic assembly 18 and serves as a drive for a moving contact 44 positioned between a first contact 46 and a second contact 48. The magnetic assembly 18 comprises a primary magnet 20 and a biasing magnet 22. The switch assembly 12 comprises a center magnet 26 interposed between the primary magnet 20 and the biasing magnet 22. The blind bore 14 has a uniform bore diameter. The magnetic proximity sensor assembly 10 comprises a sleeve 28 in the blind bore 14 contacting the closed end 30 of the blind bore 14. The switch assembly 12 is seated on the sleeve 28 such that the primary magnet 20 of the magnetic assembly 18 is surrounded by the sleeve 28.

A lawnmower comprising a housing, one or more cutting blades, and a motor configured to rotate the one or more cutting blades. The lawnmower includes a handle including a switch assembly. The switch assembly includes a contactless switch pivotable about an axis point and a magnet located at the axis point. One or more paddles extend from the handle. The rotation of the one or more paddles causes the contactless switch to pivot about the axis point. The lawnmower includes a sensor configured to sense a variation of a magnetic field of the magnet, and a controller coupled to the motor and the sensor. The controller is configured to receive, from the sensor, a value associated with the variation of the magnetic field of the magnet, and control the motor based on the value of the variation of the magnetic field.

A lawnmower comprising a housing, one or more cutting blades, and a motor configured to rotate the one or more cutting blades. The lawnmower includes a handle including a switch assembly. The switch assembly includes a contactless switch pivotable about an axis point and a magnet located at the axis point. One or more paddles extend from the handle. The rotation of the one or more paddles causes the contactless switch to pivot about the axis point. The lawnmower includes a sensor configured to sense a variation of a magnetic field of the magnet, and a controller coupled to the motor and the sensor. The controller is configured to receive, from the sensor, a value associated with the variation of the magnetic field of the magnet, and control the motor based on the value of the variation of the magnetic field.

Switch assemblies and switching methods are disclosed. In some embodiments, a switch assembly may include a first blade having a first contact within an enclosed cavity, and a second blade having a second contact within the enclosed cavity. The first and second contacts are operable to make or break contact with one another in response to a magnetic field. The switch assembly may further include a coating formed over each of the first and second contacts, the coating including a titanium layer, a second layer formed over the titanium layer, and a tungsten-copper layer formed over the second layer. In some embodiments, the second layer is copper or molybdenum.

An electronic apparatus according to an embodiment of the present technology includes an apparatus body, a pressure detector, and a controller. The apparatus body includes a principal surface, and a peripheral surface that is held by a user. The pressure detector is arranged on the peripheral surface, and detects a holding force that acts on the peripheral surface. The controller controls an operation of the apparatus body according to a temporal change in the holding force detected by the pressure detector.