| 摘要 |
<p>A hand implement (10) for providing a locating, measurement, alignment or levelling function. One embodiment of the implement (10) provides a straight edge and comprises a body (12) having a size and shape such that it is single handedly manually positionable by an operator at a location. A portion of the body (12) is adapted for the operator to perform at least one of the locating, measurement, alignment or levelling functions with the other hand while holding the body at said location. Thus the body (12) provides a straight edge (16). Laser beam generating means (18) are mounted on the body for generating and propagating two laser beams (20) away from the body. The two laser beams (20) are oppositely directed, are co-linear, and are aligned with the straight edge (16). In other embodiments, the implement may be a level, a centre marker or an angle setter. The oppositely directed laser beams are locatable on spaced reference points to accurately align the implement between those points and thus allow the locating, measurement, alignment or levelling function to be provided at the location of the implement relative to remotely spaced reference points.</p> |
