Builder's hardware; a manual for architects, builders and house furnishers . can be adjusted to either right or lefthand doors. HOTEL-LOCKS. Hotel-locks are usually made to order, and master-keyed insets. In a large hotel all the locks on a floor can be openedwith one key. In smaller buildings all the room-locks aremaster-keyed in a single series. The protection afforded bylocks which are master-keyed is, of course, less than it wouldotherwise be, as a master-keyed lock can very easily be pickedif the principle of master-keying is understood, and in most Chapter XI. Tale & TowneMfg. Co. Hotel-
Builder's hardware; a manual for architects, builders and house furnishers . can be adjusted to either right or lefthand doors. HOTEL-LOCKS. Hotel-locks are usually made to order, and master-keyed insets. In a large hotel all the locks on a floor can be openedwith one key. In smaller buildings all the room-locks aremaster-keyed in a single series. The protection afforded bylocks which are master-keyed is, of course, less than it wouldotherwise be, as a master-keyed lock can very easily be pickedif the principle of master-keying is understood, and in most Chapter XI. Tale & TowneMfg. Co. Hotel-Locks. 210 BUILDERS HARDWARE. Chapter XI. P. & F. Corbin. Hopkins &DickinsonMfg. Co. cases master-keying benefits no one but the with the Yale and the Hopkins & Dickinsoncylinder-locks, there has not yet been devised a really satis-factory system of master-keying. The two exceptions willbe described in a subsequent chapter. The simplest and also the cheapest method of master-keyingis illustrated by one of Corbins locks, Figure 331. The. Fig. 33 1. Master-keyed P. & F. Fig. 332. Master-keyed Lock. Hop-kins & Dickinson Mfg Co. gating on the one lever is made so wide as to admit of fiftydifferent positions, in any one of which the bolt-post could room-key raises the lever so as just to clear the top of thegating, and the master-key allows the post to clear the bottomof the gatings. A bent wire would serve quite as well foropening the lock as either of the keys. Fortunately foroccupants where such locks are used, it is customary to fithotel-locks with a small bolt, worked from within. Figure 332is much better. The levers are exactly like those of anyordinary lock, except that there is a shoulder A at the back of HOTEL-LOCKS. 211 each. Beneath the bolt-tail is a fourth lever, with an arm onit, rising so as to catch under the shoulders A. This lever isprotected by a ward about the key-hole. The room-key liftsthe levers and shoots the bolt wit
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