Balance using a beam type load cell

Claim 1

A balance, using a beam type load cell as a weighing element, comprising, in combination, a substantially flat horizontally oriented base; an upright secured to said base at one end and extending perpendicularly upwardly from said base; a pair of first shafts rotatably mounted in said upright in vertically spaced relation to each other; upper and lower supports each secured at one end to a respective one of said first shafts and extending substantially horizontally therefrom; a pair of second shafts each secured in the opposite end of a respective support; a load transmitting member mounted on said second shafts to extend substantially parallel to said upright; a weighing pan secured to the upper end of said load transmitting member; a stationary member secured to said upright intermediate said first shafts; a relatively elongated plate form body secured at one end to said stationary member to extend horizontally therefrom, and having a free outer end; a knife edge extending transversely of the free end of said body; at least one strain gauge secured to said body intermediate its ends to measure strain in said body; at least one wire extending across said knife edge and secured to said load transmitting member adjacent the lower one of said second shafts; and means securing the opposite end of each wire to said body inwardly of said knife edge.