Builder's hardware; a manual for architects, builders and house furnishers . t-ing-rails pass each other, the locking-lever is raised, releasingthe bolt, which flies out as soon as the window is closed, thuslocking the sashes. Figure 206 is a self-locking sash-fast on a different cut shows the lower sash partly raised, the locking por-tion being attached to the upper the window is closed the hook,D, strikes against the catch, C, forc-ing it away from B, until, when themeeting-rails are on a level, D, ishooked in between C and B. Aspring at A keeps the two partspressed a
Builder's hardware; a manual for architects, builders and house furnishers . t-ing-rails pass each other, the locking-lever is raised, releasingthe bolt, which flies out as soon as the window is closed, thuslocking the sashes. Figure 206 is a self-locking sash-fast on a different cut shows the lower sash partly raised, the locking por-tion being attached to the upper the window is closed the hook,D, strikes against the catch, C, forc-ing it away from B, until, when themeeting-rails are on a level, D, ishooked in between C and B. Aspring at A keeps the two partspressed against each other. A very ingenious sash-fast, whichworks almost entirely by gravity, isshown by Figure 207. The cut showsit in the position it takes when thewindow is locked. The mechanismis attached to the upper sash. A ishung on each side to B, which hooksover the post on the lower sash. Toopen the window, the thumb is placed under B and the forefin-ger on top of A. Both pieces are lifted together until B as-sumes a vertical position, and A catches over the hook C. The. Fig. 205. Security Sash-fast. SASH-FASTENINGS. 135 sasli can then be opened freely. On closing the window, how-ever, the lower rail strikes against a hidden lever or cam at the back of A, lifting it from itshold on O, so the piece B candescend to hook in the posi- Chapter VIII.
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Keywords: ., bookcentury1800, bookdecade1890, bookidbuildershard, bookyear1890
