clearance space

1 definition found

clearance space - Collaborative International Dictionary of English v.0.48 :

  Clearance \Clear"ance\ (kl[=e]r"ans), n.
     1. The act of clearing; as, to make a thorough clearance.
        [1913 Webster]
  
     2. A certificate that a ship or vessel has been cleared at
        the customhouse; permission to sail.
        [1913 Webster]
  
              Every ship was subject to seizure for want of
              stamped clearances.                   --Durke
        [1913 Webster]
  
     3. Clear or net profit. --Trollope.
        [1913 Webster]
  
     4. (Mach.) The distance by which one object clears another,
        as the distance between the piston and cylinder head at
        the end of a stroke in a steam engine, or the least
        distance between the point of a cogwheel tooth and the
        bottom of a space between teeth of a wheel with which it
        engages.
        [1913 Webster]
  
     Clearance space (Steam engine), the space inclosed in one
        end of the cylinder, between the valve or valves and the
        piston, at the beginning of a stroke; waste room. It
        includes the space caused by the piston's clearance and
        the space in ports, passageways, etc. Its volume is often
        expressed as a certain proportion of the volume swept by
        the piston in a single stroke.
        [1913 Webster]