Mobile wooden truss fabricating apparatus
OwnerWilliam D. McDonaldinventor
Life of this patent
Estimating the term…
Abstract
A trailer bed or chassis including side rail extensions and center rail support posts serves to mount a wooden truss fabricating jig including laterally adjustable center rail sections and associated transverse arms for the support of truss lumber. An arrangement of permanent stops and swivel stops on the jig together with a truss peak locator and splice locator enable the setting up on the job site of a calibrated jig prior to placing the truss lumber thereon, resulting in a great savings of time in truss fabrication. Trusses are produced with precision and uniformity having improved quality and a wider range of truss sizes can be accommodated with the apparatus because of its versatility.
Claims23
A mobile truss fabricating apparatus comprising a trailer bed adapted to be towed to a job site, an articulated boom on the trailer bed rotatable on a vertical axis through a full 360 degrees of rotation in opposite directions, and a truss lumber locating and holding jig on the trailer bed, said jig comprising a main longitudinal jig rail including plural independently laterally adjustable rail sections, means to guide said laterally adjustable rail sections during their adjustment on the trailer bed and to lock them in selected adjusted positions, oppositely projecting transverse jig arms attached to said laterally adjustable main jig rail sections, a series of permanent stops for engagement with a truss bottom chord carried by the transverse jig arms which project from one side of the main jig rail, and a series of swivel stops for engagement with truss pitched members on the transverse jig arms projecting from the other side of said main jig rail.
Dependencies are inferred from the claim text.