Measuring apparatus for the geometric checking and-or correction of railroad tracks

Claim 1

A measuring apparatus for the geometric checking and/or correction of railroad tracks incorporating spaced rails, comprising two measuring means defining two reference datums extending in the lengthwise direction of the track, said measuring means bearing upon at least one track rail, one of said measuring means defining a first reference datum bearing upon two points along the track rail, which points define a straight line, the other of said measuring means defining a second reference datum bearing upon two other points of the track rail defining another portion of a straight line, a deformable mechanism incorporating at least two converging rod members and defining a linkage mechanism for operatively interconnecting with one another said first reference datum and said second reference datum defined by said measuring means, said converging rod members being connected in the direction of their converging ends with said measuring means defining said second reference datum, a measuring element movably connected with said first reference datum defined by said one measuring means, the diverging ends of said rod members being articulated with said movable measuring element, said converging rod members converging at a point selected to be disposed perpendicular to a point of the track rail situated forwardly of said first reference datum and at or with said points defining the portion of said straight line defining said second reference datum.