Builder's hardware; a manual for architects, builders and house furnishers . e as the latch. The follow is made double, to permitof swivel-spindles, and the outside is locked by the arm latch has a very easy spring, the follows being stiffenedby a spring. Hall manufactures a front-door lock almost exactly likeFigure 327, but with his peculiar anti-friction strike. VESTIBULE-LATCHES. Vestibule Latches. g^=® These are always sold insets, with a front-door lock,and the levers are so ar-ranged that the same latch-keywill open both, the vestibule-lock having no dead-bolt. But,more generally s
Builder's hardware; a manual for architects, builders and house furnishers . e as the latch. The follow is made double, to permitof swivel-spindles, and the outside is locked by the arm latch has a very easy spring, the follows being stiffenedby a spring. Hall manufactures a front-door lock almost exactly likeFigure 327, but with his peculiar anti-friction strike. VESTIBULE-LATCHES. Vestibule Latches. g^=® These are always sold insets, with a front-door lock,and the levers are so ar-ranged that the same latch-keywill open both, the vestibule-lock having no dead-bolt. But,more generally speaking, a ves-tibule-latch may be consideredas any spring-lock having nodead-bolt. When used for avestibule-door the latch shouldhave swivel-spindles and leversto lock the outside-knob. Figure 328 is a pattern whichP. & F. Corbin list as a front-door lock, but which seems to Fig. 328. Front-Door be more properly a vestibule-Lock. P, & F. Corbin. ,. latch. The key lifts the levers and moves a plate on whichare two posts A and B, one of which must pass the gatings. VESTIBULE-LATCHES. 209 before the other can reach the shoulder on the latch-bolt C, and force it back. Figure 329 is the vestibule-latch sold with the front-door lock represented by Figure 827. Figure 330 is a Standard knob-latch manufactured by the Yale & Towne Company, which is not, properly speaking, a vestibule-latch, but which isworthy of consideration in thisconnection. It is provided withtriple-springs, thus permittinga very easy action on the part
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