Patent ID: 6912794

Claim:
A combination level and plumb comprising: (a) a first I-section beam having (1) a longitudinal axis, (2) at least two spirit levels mounted on the first I-section beam, at least one of which is oriented parallel to the longitudinal axis of the first I-section beam and at least one of which is oriented perpendicular to the longitudinal axis of the first I-section beam, (3) apertures through the first I-section beam for viewing various ones of the at least two spirit levels therethrough, and (4) a flange; (b) a second I-section beam having (1) a longitudinal axis, (2) at least two spirit levels mounted on the second I-section beam, at least one of which is oriented parallel to the longitudinal axis of the second I-section beam and at least one of which is oriented perpendicular to the longitudinal axis of the second I-section beam, (3) apertures through the second I-section beam for viewing various ones of the at least two spirit levels therethrough, and (4) an end; and (c) a connector including (1) a foot having claws structured to slidingly engage the flange of the first I-section beam, (2) a pair of wings affixed to the foot, and (3) a tongue including (A) a pin pivotally connecting the tongue to the pair of wings about an axis, (B) a leading edge arcuate about the axis of the pin, (C) a bifurcation including a retaining pin wherein the bifurcation is structured to engage the end of the second I-section beam and the retaining pin is structured to lock the bifurcation to the end of the second I-section beam, and (D) a tongue flange having an end and a seat structured to bolster the end of the flange and to squarely contact the flange of the first I-section beam, wherein the tongue flange is structured to prevent an angular displacement of the second I-section beam relative to the first I-section beam of greater than a right angle; and (d) wherein the connector hingedly connects the second I-section beam to the first I-section beam enabling the second I-section beam to be angularly displaced up to and including a right angle relative to the first I-section beam and wherein the connector allows the second I-section beam to slide along the first I-section beam.