Builder's hardware; a manual for architects, builders and house furnishers . Norwich Lock Fig. I 87. Sash-fast. P. & F. Cor-bin. strong form of sash-fast with no spring of any sort, but with aprotection for the lever by dovetailing the plates together, asdescribed in the previous paragraph; while the sash-fast in-dicated by Figure 187 works in exactly the same manner, butthe plates are rebated together. Figure 188 is yet anothervariety, the plates here being not only dovetailed together, but SA SH-FA STENIN < ? S. 127 also lipped down into the joint between the meeting-rails. Thelever works
Builder's hardware; a manual for architects, builders and house furnishers . Norwich Lock Fig. I 87. Sash-fast. P. & F. Cor-bin. strong form of sash-fast with no spring of any sort, but with aprotection for the lever by dovetailing the plates together, asdescribed in the previous paragraph; while the sash-fast in-dicated by Figure 187 works in exactly the same manner, butthe plates are rebated together. Figure 188 is yet anothervariety, the plates here being not only dovetailed together, but SA SH-FA STENIN < ? S. 127 also lipped down into the joint between the meeting-rails. Thelever works in the same manner as the first sash-fast noticed. II. Spring lever sash-fasts. While some of the forms justdescribed might be classed under this category, none of themactually have spring levers, as the springs are not so arrangedas to force the lever open or shut from any position. Figure189 shows what is known as the ordinary Boston sash-fast,which is used a great deal inBoston, and is much liked forits simplicity and sureness ofaction. This form is, appar-ently
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