Builder's hardware; a manual for architects, builders and house furnishers . to gather reliable dataconcerning all of the different makes. It is believed, however,that those illustrated will serve as fair criterions of what themarket is producing. The desertions will be limited chieflyto such as are used about an ordinary building. Time-locks, DEAD-LOCKS. 191 bank-locks, safe-locks, prison-locks, etc., are too complicated tocome within the scope of this treatise, and are, besides, quiteoutside the line of whatcould fairly be termedbuilders hardware. An analysis of the va-rious styles of locks
Builder's hardware; a manual for architects, builders and house furnishers . to gather reliable dataconcerning all of the different makes. It is believed, however,that those illustrated will serve as fair criterions of what themarket is producing. The desertions will be limited chieflyto such as are used about an ordinary building. Time-locks, DEAD-LOCKS. 191 bank-locks, safe-locks, prison-locks, etc., are too complicated tocome within the scope of this treatise, and are, besides, quiteoutside the line of whatcould fairly be termedbuilders hardware. An analysis of the va-rious styles of locks canbe best followed by tak-ing the different exam-ples according to the useto which each is may, then, beclassed as: First, dead-locks. Second, ordinary lock and latch combined. Third, front-door locks. Fourth, vestibule-locks. Fifth, hotel-locks. Any of these, except the first, may have anti-friction strikes,and may be mortise, rim, or rebate, and all can be master-keyed. Consequently in these live categories can be includedall ordinary house-locks. Chapter Fig. 297. Mortise & DEAD—LOCKS. Figure 297 is a type of the most simple form of dead-lock,manufactured by Russell & Erwin, having five plain, pivotedlevers, permitting of 120 changes in the lock by transpositionof the levers. The same style of lock is made with as few asone lever. A. G. Newman manufactures a very good store-door lock, Figure 298, in which the levers slide up and downbut are not pivoted together. Figure 299 illustrates the Standard store-door lock, manufactured by the Yale & TowneMfg. Co., a very strong, well-made, and almost unpickablelock. The bolt-tail is the full thickness of the bolt but ismade with a shell so that the tumblers work within the bolt, asit were, and the key, instead of acting against the under side 192 Chapter XL Store-lock withnotched gat-ings. BUILDERS HARDWARE. of the four levers, works through the centres; and, instead ofacting directly upon th
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