Apparatus for measuring the elongation of sample strips.

摘要

The present invention relates to an apparatus for measuring the respective elongations of several sample strips (13), comprising: a vertical framework (51) including upper stationary (27) and lower moving (15) magnetic clamps, each for holding strips (13), the lower clamp (15) tensioning the strip by gravity; and an electronic displacement sensor (33, 35) associated with each lower clamp (15). Each clamp comprises a base and a plate hinged to this base. A magnet (11) is mounted in the base flush with one contact face of the base and intended to hold the plate pressed against the said contact face by magnetic attraction.
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