Shear beam load cell system

A shear beam load cell system comprising:

• (a) a longitudinally extended beam member having a central axis;
• (b) flexure isolation means formed on opposing longitudinal end sections of said beam member for minimizing stress changes in a central section of said beam member responsive to non-measurement loads applied to said beam member, said flexure isolation means including at least a pair of through passages formed through each of said opposing longitudinal sections of said beam member, said through passages extending in a transverse direction with respect to said beam longitudinal extension and at least a pair of slots passing through said beam member in a substantially vertical direction from an external surface of said beam member to a respective through passage;
• (c) a plurality of strain gauge members fixedly secured to said central section of said beam member;
• and,
• (d) web flexure means formed within said central section of said beam member for mounting said strain gauge members to said beam member, said web flexure means including a plurality of recesses extending transverse said longitudinal extension from opposing transverse surfaces of said beam member, said recesses defining at least a pair of wells substantially aligned in said transverse direction forming a longitudinally extending web member substantially coincident said central axis, said wells having a transversely directed center line vertically displaced from said beam central axis.