Combined level and protractor with calibration features

A combined level and protractor assembly including an elongated body comprising a pair of laterally abutted elongated opposite side body members, the opposing sides of said body members defining one end of said body including opposing recesses formed therein together defining a cavity opening endwise outwardly of said one end and through one longitudinal edge of said body along the latter from said one end to points spaced therealong toward the other end of said body, an elongated protractor arm having one end thereof pivotally supported within said cavity for angular displacement of said arm relative to said body between an extended position projecting outwardly of said one edge at 90.degree. relative thereto and a retracted position received within the portion of said cavity extending along said one edge, spirit level assembly means carried by the other end of said body, the ends of said body members defining the other end of said body including opposing sockets formed therein, said spirit level assembly means including mounting frame means captively received in said sockets, the portions of said members defining said sockets having transverse window openings formed therethrough registered with said sockets for viewing said spirit level assembly means from the outer sides of said members, said body members being removably secured together through the utilization of threaded fasteners secured through one of said body members and threadedly engaged relative to the other body member, said frame means being clamped between the portions of said members defining the inner extremities of said sockets, control means operable to adjustably limit swinging movement of said arm toward the extended position thereof, said control means comprising a cam rotatably mounted from said body members, disposed in said cavity and engageable by said arm for limiting swinging thereof toward said extended position, said cam including a journal shaft portion received through a journal bore provided therefor in one of said body members and engageable from the exterior of said body to rotate said shaft portion, and thus said cam, said cam being releasably clamped in adjusted position between said body members and within said cavity upon the tightening of said threaded fasteners, said body members including registered handhold defining transverse openings formed therethrough, the end portion of said cavity remote from said one end of said body opening into both said openings through the sides thereof adjacent said one longitudinal edge of said body.