Patent ID: 8399782

Claim:
A beam scale assembly ( 20 ) for proportioning a first component in a first container and a second component in a second container and comprising: a balance beam ( 22 ) having a first balancing area ( 34 ) and a second balancing area ( 36 ) for receiving the first and second containers respectively, said balance beam ( 22 ) having a center axis (A 0 ) disposed between said balancing areas ( 34 , 36 ), said first balancing area ( 34 ) including a first axis (A 1 ) disposed in spaced and parallel relationship to said center axis (A 0 ) and said second balancing area ( 36 ) including a second axis (A 2 ) disposed in spaced and parallel relationship to said center axis (A 0 ), and characterized by a pivot assembly ( 24 ) including a pivot ( 48 ) extending downwardly from said balance beam ( 22 ) to a pivot edge ( 50 ) defining a pivot axis (B) and having a cross-section being semi-circular to define a flat surface ( 52 ) for supporting said balance beam ( 22 ) and a circular support surface ( 54 ) to establish a rocking movement of said balance beam ( 22 ), and said pivot assembly being movably connected to said balance beam ( 22 ) between said first and second balancing areas ( 34 , 36 ) for moving said pivot assembly ( 24 ) relative to said center axis (A 0 ) to define a first variable pivot distance (Pd 1 ) between said first axis (A 1 ) and said pivot axis (B) and a second variable pivot distance (Pd 2 ) between said second axis (A 2 ) and said pivot axis (B) to proportion the first and second components according to said first variable pivot distance (Pd 1 ) and said second variable pivot distance (Pd 2 ) of said pivot assembly ( 24 ).