| 摘要 |
A body, having a straight-edged rule fixed thereto, and transverse thereto, slidably receives a pair of blocks which also have straight-edged rules fixed thereto. All the rules are parallel, and one thereof is used to engage a proximate wall surface, while the other two are adjustably set to take the measure across a last-laid tile. Then, the first, which engages the wall surface is fully retracted, while the adjustably-set other two rules are advanced, with the body, to the wall surface. The outermost rule, then, along its straight edge, defines whereat a next tile is to be cut to fit an undersized space.
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