DEVICE FOR CENTERING SPECIMEN ON TENSION-COMPRESSION TESTING MACHINE Russian patent published in 1994 - IPC

FIELD: measurement of forces. SUBSTANCE: casing in the form of cylindrical sleeve with central hole in bottom houses two hollow sleeves whose end surfaces are concentric with the surface of supporting sphere with a specimen-fastening link installed therebetween and interacting with them via balls. Side walls of hollow sleeves have through slits equispaced around the circumference and contrary-opposed to each other at equal angles to longitudinal axis of sleeves. Slanting connectors of each sleeve engage the internal slanting projections of two pairs of shaped flat rings arranged square to the axis of the device and having cylindrical holes with their axes running parallel with the axis of the device. The centers of cylindrical holes in each ring of the pair are offset circumferentially from internal slanting projections. Guide spindles with axes parallel to the axis of the device are equispaced around the circumference with the center on the axis of identical sleeves. The device is provided with deformation indicator. EFFECT: improved design. 2 dwg