Abstract: Disclosed is a pivotable, multi-coil spring counterbalance, and method for using the same, which allows the user to readily attach a desired number of coil springs having chosen forces to a counterbalance connector attached to a vertically movable member, thereby providing an offset for at least a portion of the weight thereof.

Abstract: A curl spring mount has a separate cover that can snap fit into the mount to cover and protect the curl springs. A portion of the cover disposed over the vertical space occupied by the curl springs is arranged outside a jamb channel so that the curl springs can occupy the full width of the channel. A shield portion of the cover extends transversely of the jamb channel above the curl springs to protect them from dirt.

Abstract: A sealing structure for a movable window allows a movable windowpane to lie flush with the outside of the window sill frame. The vertical edges of the windowpane are provided with projecting guides which have a runner lying somewhat offset from the plane of the rest of the pane. The guide runners are supported by elastic seals such that the pane lies flush with the outer surface of the window sill frame. A vibration damper in the shape of an inverted "V" may be provided at the top of the window sill frame in order to guide the top edge of the pane into place and to prevent the pane from vibrating excessively.