Disclosed is a method of resistance welding between composite articles. A conductive element is provided between faying surfaces, having a plurality of lower resistivity electrode portions spaced apart along the length of the contact area between the composite articles. The electrode portions can be used to spot weld across the electrode portions, and along a longitudinal portion of the conductive element between the electrode portions by application of an electrical current. Also disclosed are apparatus for use in the resistance welding methods and composite articles and structures and elements incorporating the conductive element.

An electromechanical switching device for breaking an electric current, the switching device including a stationary main contact; a movable main contact; a stationary arcing contact; a movable arcing contact, the stationary arcing contact and the movable arcing contact being arranged in parallel with the stationary main contact and the movable main contact; an actuating arrangement configured to move the movable main contact and the movable arcing contact; and a magnetic member arranged to generate a magnetic holding force in response to an electric current flow through the movable arcing contact when the movable arcing contact is in the closed position, the magnetic holding force acting on the movable arcing contact in a direction against the stationary arcing contact.

A switch system includes a mechanical switch for electrical currents. The mechanical switch operates in a conductive state and in a non-conductive state. A first actuator is configured to change the state of the mechanical switch, wherein an actuation of the first actuator is based on a Thomson coil system. A second actuator is also configured to change the state of the mechanical switch and includes a loaded spring system locked by a latch system. Each of the first and second actuators is configured to change the state of the mechanical switch depending on a property of an electrical current passing through the mechanical switch.

A test bench for a contactor bulb includes: a frame, configured to fix the bulb therein, and an actuation device, borne by the frame and including an output shaft, centred on a longitudinal axis and translationally movable with respect to the frame parallel to the longitudinal axis between a front position and a rear position, the output shaft being configured to be connected to an actuation rod of the bulb. The actuation device is a moving magnet electromagnetic actuator.

Provided is a contact device including a first contact, a second contact that is movable relative to the first contact and is brought into contact with or separated from the first contact, a first body part including the first contact, a second body part including the second contact, and a yoke arranged adjacent to at least one of the first body part or the second body part. At least a part of the yoke is arranged along magnetic flux generated by a current flowing through one body part of the first body part and the second body part that is adjacent to the yoke, in a region where the first body part and the second body part overlap each other when viewed along an axis in which the first contact and the second contact move relative to each other while the first contact and the second contact are in contact with each other.

A circuit interrupter includes a first set of contacts connected in series with a second set of contacts, with both sets of contacts configured to open and close simultaneously. First and second arc extinguishers are associated with the first and second sets of contacts, respectively. A moveable permanent magnet moves as the sets of contacts simultaneously open and close, the moveable magnet generating a moveable magnetic field, a first stationary permanent magnet associated with the first arc extinguisher, the first stationary magnet generating a first stationary magnetic field, where the first stationary magnetic field and the moveable magnetic field are additive, and a second stationary permanent magnet associated with the second arc extinguisher, the second stationary magnet generating a second stationary magnetic field, where the second stationary magnetic field and the moveable magnetic field are also additive.

A high-voltage direct current relay capable of improving insulation capability, including a ceramic cover, two fixed contacts for respectively providing inflow and outflow current and one movable contact spring; a through hole for assembling the fixed contact being provided at a top wall of the ceramic cover; one segment of a body of the fixed contact being in clearance fitted with the through hole of the ceramic cover, a first step surface downward being provided at an outer peripheral wall of one segment of the body of the fixed contact, at a corresponding position, a second step surface upward being provided at an inner peripheral wall of the through hole of the ceramic cover, and the projections of the first step surface and the second step surface on the horizontal plane having an overlapped region.

A gas filling structure includes a through-hole (91) formed in a hermetically sealed container (11) made of resin to fill the hermetically sealed container (11) with gas and a screw (92) fastened to the through-hole (91) to seal the through-hole (91).

A gas filling structure includes a through-hole (91) formed in a hermetically sealed container (11) made of resin to fill the hermetically sealed container (11) with gas and a screw (92) fastened to the through-hole (91) to seal the through-hole (91).

The invention relates to a switching device which has two stationary contacts and a movable contact in a switching chamber. The stationary contacts are arranged next to each other along a longitudinal direction, and the switching chamber has a switching chamber wall with opposing transversal lateral wall parts and opposing longitudinal lateral wall parts. Each of the two stationary contacts is arranged at a distance to one of the transversal lateral wall parts, said distance being shorter than the respective distance to the longitudinal lateral wall parts.