A cable elongation or relaxation measurement apparatus comprises an elongated beam having spaced apart clamp assemblies for forcibly clamping a section of cable under tension. One of the clamp assemblies is slidably mounted on a pair of parallel bearing rods secured to the beam and is centered between...http://www.google.fr/patents/US4562743?utm_source=gb-gplus-shareBrevet US4562743 - Cable elongation measurement apparatus