The sensor is formed of a hollow profile (1) of rectangular cross-section, which has two symmetrical transverse notches (2, 3) and two other symmetrical transverse notches (4, 5) at a distance from the first. These notches pass through the thickness of the large side walls (6) of the profile and, in...http://www.google.fr/patents/US4785673?utm_source=gb-gplus-shareBrevet US4785673 - Strain-gauge sensor for measuring forces
