(under the class definition) Device provided with means to mount a sliding closure for raising and lowering movement, and further provided with means to permit movement of the closure in a raised position to provide a ventilating slot or opening adjacent an upright edge of the closure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
48, for a closure having a cut-out portion or a movably mounted section to provide a vertical opening for hand signalling.
227, for a housed closure mounted for multidirectional movement in its plane to and from an open housed position and a raised, closed position out of its housing.
