tradiometer

Century Dictionary and Cyclopedia

1. n. A species of dynamometer for determining the draft of vehicles, plows, mowing-machines, etc. In one form the draft is applied to a kind of spring scale interposed between the draft-animal or propelling machine and the vehicle, plow, etc., the extension of the spring denoting the draft. Other more refined forms have been invented. One of these, by a tracing-point moved according to the pull, marks a curve on a disk, by which a variable draft is indicated.