PORT n.
as from a valve to the interior of the cylinder of a steam engine; an opening in a valve seat, or valve face. Air port, Bridle port, etc. See under Air, Bridle, etc. -- Port bar (Naut.), a bar to secure the ports of a ship in a gale. -- Port lid (Naut.), a lid or hanging for closing the portholes of a vessel. -- St…
PUPPET n.
res. -- Puppet valve, a valve in the form of a circular disk, which covers a hole in its seat, and opens by moving bodily away from the seat while remaining parallel with it, -- used in steam engines, pumps, safety valves, etc. Its edge is often beveled, and fits in a conical recess in the seat when the valve is close…
RAIL n.
ice connecting the adjacent ends of rails, in distinction from a chair, which is merely a seat. The two devices are sometimes united. Among several hundred varieties, the fish joint is standard. See Fish joint, under Fish. -- Rail train (Iron & Steel Manuf.), a train of rolls in a rolling mill, for making rails for ra…