Abstract: A wall anchor attachable to a wall, the wall defining a wall aperture. The wall anchor includes a body; a retention element operatively coupled to the body so as to be reversibly movable between a retracted configuration and an expanded configuration, wherein, when the retention element is in the retracted configuration, the wall anchor is insertable into and removable from the wall aperture, and, when the retention element is in the expanded configuration and the body is operationally extending through the wall aperture, the retention element cooperates with the body to attach the wall anchor to the wall; and an actuator operatively coupled to the retention element for selectively moving the retention element between the expanded and retracted configurations. Inserting the wall anchor through the wall aperture with the retention element in the retracted configuration and subsequently using the actuator to move the retention element to the expanded configuration attaches the wall anchor to the wall.

Abstract: A wall anchor attachable to a wall, the wall defining a wall aperture. The wall anchor includes a body; a retention element operatively coupled to the body so as to be reversibly movable between a retracted configuration and an expanded configuration, wherein, when the retention element is in the retracted configuration, the wall anchor is insertable into and removable from the wall aperture, and, when the retention element is in the expanded configuration and the body is operationally extending through the wall aperture, the retention element cooperates with the body to attach the wall anchor to the wall; and an actuator operatively coupled to the retention element for selectively moving the retention element between the expanded and retracted configurations. Inserting the wall anchor through the wall aperture with the retention element in the retracted configuration and subsequently using the actuator to move the retention element to the expanded configuration attaches the wall anchor to the wall.

Abstract: In a process for making a connection between superconductive wires constituted by one or more strands or filaments of superconductive material embedded in a metallic matrix, the metal constituting the matrix is previously eliminated over a certain length of wire, corresponding to the desired zone of contact between the wires, so as to expose the or each strand of these wires. Thereafter the linkage is established between the strands by exerting thereon a strong pressure, cold.The visible superconductive strands of the two wires are applied, near one another, on a support. A strip of superconductive material is then applied on the visible strands and a sheath made of a material which is a good conductor of electricity is placed around the assembly constituted by the support, the strands of the superconductive wires and the superconductive strip.