Scale coupling system

A coupler for removably coupling together unmodified forensic scales to form a coupled scale with two scales being coupled at a scale joint defining a fixed angle A about a vertex therebetween, such that the coupler holds the coupled scales in a way that maintains arm-to-arm angular accuracy for ruler arms of the scales coupled in the fixed angle scale joint including linearity along one hundred eighty degree joined ruler arms;

• wherein a plurality of forensic scales having standardized dimensions are provided by a user of the coupler, wherein each forensic scale has at least one straightedged ruler arm ruled for measurement with a series of scale markings extending longitudinally at regular measurement intervals;
• the coupler comprising:
• a longitudinally extending first track having:
• a lower surface;
• two laterally opposed parallel edge walls extending up from the lower surface and spaced apart by a track width W′ suitable for slidingly engaging a first ruler arm's width W;
• an open end;
• and holding tabs that extend laterally inward from both edge walls to define an upper surface spaced above the lower surface by a track height T′ suitable for slidingly engaging the first ruler arm's thickness T;
• a longitudinally extending second track having:
• a lower surface;
• two laterally opposed parallel edge walls extending up from the lower surface and spaced apart by a track width W′ suitable for slidingly engaging a second ruler arm's width W;
• an open end;
• and holding tabs that extend laterally inward from both edge walls to define an upper surface spaced above the lower surface by a track height T′ suitable for slidingly engaging the second ruler arm's thickness T;
• and
• a fixed angle junction where the first track and the second track are joined such that:
• the lower surfaces of the first and second tracks are co-planar;
• the upper surfaces of the first and second tracks are co-planar;
• and a first edge wall of the first track is joined to a first edge wall of the second track to form a vertex of the fixed angle A.