Builder's hardware; a manual for architects, builders and house furnishers . ,it will be well to classify thesash-fasts according to theirmost prominent characteristics. I. Old Style of plain lever-fast. This consists of a plain,pivoted bar, attached to theupper sash, with a hook on the end, which works over a catchor raised plate on the lower sash. A knob, often of porcelain,is fastened to the end of the bar. Figure 183 illustrates thistype. In the oldest makes of this kind, the lever was simplypivoted on the upper sash, and a knife-blade, slipped betweenthe meeting-rails, could push the leve
Builder's hardware; a manual for architects, builders and house furnishers . ,it will be well to classify thesash-fasts according to theirmost prominent characteristics. I. Old Style of plain lever-fast. This consists of a plain,pivoted bar, attached to theupper sash, with a hook on the end, which works over a catchor raised plate on the lower sash. A knob, often of porcelain,is fastened to the end of the bar. Figure 183 illustrates thistype. In the oldest makes of this kind, the lever was simplypivoted on the upper sash, and a knife-blade, slipped betweenthe meeting-rails, could push the lever to one side and unlock thewindow without the slightestdifficulty. In the sash-fastshown by the figure, the leveris made with a broad, flatend, which presses against astrong spring, A, at the spring serves to stiffenthe action of the lever, whichis further protected againstintrusion, in some cases, bydovetailing the bottom plates,so that the lever cannot be got at through the joint betweenthe meeting-rails. Varieties of this same form are made with Chapter Fig. 184. Sash-fast. Russell & Erwin. Plain LeverSash-fasts 12G B UILDERS HA RD WA RE. Chapter VIII. the lever swinging only half around in one direction, the gainthereby being that the back spring can be made longer andstiffer, without increasing the size of the sash-fast. Figure 184 represents a variety of sash-fast, in which thelever is on the lower sash and hooks over an inverted peg onthe upper sash. The Judd sash-fast, Figure 185, has a
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