| 摘要 |
A window construction having a sash supported on rollers for movement along a guideway on the window frame. With the sash in either the closed or opened position, it may be transversely moved into and out of sealing engagement with the frame by means of a mechanical linkage. This linkage comprises a first block transversely movable on the sash and engageable with the guideway, a second block on the window sash movable lengthwise of the guideway and means interconnecting the two blocks such that when the second block is shifted by means of an actuator operatively connected thereto by means of a cable extending around the periphery of the sash, the first block engages the guideway to shift the sash transversely of the frame. The blocks are concealed from sight within a hollow section of the sash. |
