LAP n.
, etc. It is usually in the form of wheel or disk, which revolves on a vertical axis. Lap joint, a joint made by one layer, part, or piece, overlapping another, as in the scarfing of timbers. -- Lap weld, a lap joint made by welding together overlapping edges or ends. -- Inside lap (Steam Engine), lap of the valve wi…
LINE n.
d of elongated S (like the one drawn by Hogarth). -- Line of centers. (Mach.) (a) A line joining two centers, or fulcra, as of wheels or levers. (b) A line which determines a dead center. See Dead center, under Dead. -- Line of dip (Geol.), a line in the plane of a stratum, or part of a stratum, perpendicular to its…