Abstract: A device for gripping a specimen for applying to the same tensile or torsional strain includes two plates spaced from each other and a tubular spacer extended between the two plates and accommodating a specimen. The specimen is attached to the plates by respective nuts. One end of the specimen extended outwardly from the respective plate and nut is formed by a threaded pin, on which a pulling device for applying tensile stress onto the specimen, is set. The other end of the specimen has a square portion to which a tap wrench is applied, which, with the aid of two bolts positioned on one of the plates, applies torsional strains to the specimen.

Abstract: A multi-layer container which includes a container forming a body of rotation in a tubular or at least partially spherical or conical shape, and having a plurality of layers of weldable sheet metal therewith. The first one of these layers is wrapped directly upon and around the container and the other layers are wrapped around the first layer and one upon the other. Each layer includes at least one joint extending in the longitudinal direction of the container; at least some are only partially filled with welded material.

Abstract: Method for implanting and subsequently removing mechanical implants of an Ni-Ti or a Ti-Nb alloy material which exhibits the memory effect which occurs due to heating of the implant to a temperature above the specific temperature for the alloy material. The memory effect is actuated by heating the implant after implantation of same in the living tissue, and upon completion of the healing process, the implant is substantially returned to its shape upon implantation by cooling it to a temperature below the temperature which actuates the opposite memory effect to facilitate removal.