Surface gauge for measuring, checking and marking distances on work pieces

Claim 1

A SURFACE GUAGE FOR MEASURING, CHECKING AND MARKING DISTANCES ON WORK PIECES, PARTICULARLY A VERNIER HEIGHT GUAGE, COMPRISING A BAR, A GRADUATED SLIDE ADJUSTABLY MOVABLE IN INTERVALS ON SAID BAR, AN ADJUSTBLE SLIDE BLOCK SLIDABLY MOVABLE ON THE BAR IN RELATION TO THE GRAUDATED SLIDE, AND A CYLINDRICAL FRICTION ROLLER CONNECTED TO THE SLIDE BLOCK AND ADAPTED TO ROLL UNDER ELASTIC PRESSURE ON A SMOOTH RAIL WHICH IS SEPARATE FROM AND EXTENDING PARALLEL TO THE BAR, SAID CYLINDRICAL FRICTION ROLLER HAVING A PROFILED SURFACE FOR FIRMLY RETAINING AND LOCKING THE SLIDE BLOCK IN ANY POSITION ON THE BAR AND CONSTITUTING THE ONLY MEANS FOR THE ADJUSTMENT OF THE SLIDE BLOCK, THE FRICTION ROLLER BEING ROTATABLE BY A HAND WHEEL AND A BACKING ROLLER BEARING AGAINST THE OPPOSITE SIDE OF THE SMOOTH RAIL, SAID FRICTION ROLLER AND BACKING ROLLER BEING MOUNTED BETWEEN THE SHANKS OF TWO INTERPOSED U-SHAPED STIRRUP MEMBERS WHICH HAVE SPACED WEB PORTIONS AND EMBRACE THE SMOOTH RAIL ON ITS SIDE REMOTE FROM THE BAR AND BEING ELASTICALLY PULLED TOGETHER FOR THE RAIL TO BE ELASTICALLY GRIPPED BETWEEN THE TWO ROLLERS.