The fundamental parts of the balance are shown above. Around three metal frames are taut special alloy bands to which the upper and lower beam bars of the balance are firmly clamped. The center frame or truss is rigidly attached to the stand or base.

The dial mechanism consists of a special alloy calibrated spiral spring, one end of which is attached to the hub of the dial and the other end to the upper beam bar. Rotating the spiral spring shaft applies a torque to the upper beam bar and is equivalent to adding weight to the right side of the mechanism. The construction of the dial mechanism permits the changing of weight as rapidly or as slowly as desired, with no stress or strain on the mechanism.

Thus, the entire mechanism is one piece without any loose parts to wear out or cause faulty operation. No loose parts means the mechanism is permanently adjusted, because the lack of movement of parts (one over the other) assures the user that the initial accuracy and sensitivity remain constant for the life of the balance.

The absence of a knife edge fulcrum along with the sliding weight and graduated beam make possible a sensitive balance, independent of wear and unaffected by dust or dirt.