erial into the pockets C which are to permit the upper sash to swing freely inward. similar articles. The brush is provided with an inner arranged in parallel rows. From time to time as The stiles are preferably rabbeted, to permit outward revoluble part arranged, like a water wheel, to be the… … connected to an oscillating mechanism. The upper IMPROVED WINDOW CONSTRUCTION. series of pickers are of the form indicated in Figs. 3 to keep the bristles clean. The outer ring A of the and 4. They are also flexibly connected to spindles brush is formed with a spider B in which the inner the sashes…
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