Mechanical multiplier for a strain gage on a derrick

摘要

A strain gage apparatus for measuring the load applied to a derrick leg mechanically multiplies the deflection or distortion of a strain gage. The apparatus attaches to the derrick leg at two points that are spaced about five feet apart. Accumulated strain along the five-foot section moves one end of an elongate member a significant distance. The distance is much greater than any localized movement or minute strain in the derrick leg. The movement of the elongate member stresses a reaction member upon which the strain gage is mounted.