Window with reversible pane - sandwiched by two frame pieces which pivot apart allowing pane to pivot, slide and rotate into offset position

摘要

The window has a pane which can be rotated about an axis of symmetry. The frame is in two pieces which sandwich the edges of the pane, one piece pivoting to liberate the pane for inversion. The pane pivots about the same axis as the movable frame piece, and moves into an offset position. The movable frame pieces may be side hung on the fixed piece, the pane being mounted in a lateral 'U' shaped support. The support pivots about its vertical leg, the pane then sliding into a horizontally offset position, sliding being effected automatically by springs.