Abstract: An assembly method is provided by orienting a cylinder-head at a first orientation. A first plurality of spring caps and a first plurality of retainer keys are installed into the cylinder-head in the first orientation by a first robot. A first plurality of valves is installed into the cylinder-head in the first orientation by a second robot, into engagement with the first plurality of retainer keys. An end effector is provided with an actuator supported upon an adapter plate. A shaft extends from the actuator with a mating surface to engage a spring cap. Porting is provided through the shaft to convey pressurized air upon a plurality of retainer keys within the spring cap. A plurality of gripper fingers extend from the distal end of the shaft to grip a valve spring while retaining a spring cap between the valve spring and the mating surface of the shaft.

Abstract: An electrical contact arrangement for medium to high voltage applications includes a contact arm having a distal end section on which a circular shaped annulus arrangement having several axially and parallel directed contact fingers is arranged. The contact fingers are pressed on the contact arm via respective radially directed connection sections by a spring ring which is peripherally arranged around the contact fingers. The distal end section of the contact arm includes a first ring-shaped surface and an adjacent second ring-shaped surface, so that the connection section of each contact finger is pressed to at least both the first and second ring-shaped surfaces.