Builder's hardware; a manual for architects, builders and house furnishers . 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 f
Builder's hardware; a manual for architects, builders and house furnishers . 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 without disturbing the fourthlever. The master-key lifts the fourth lever without touching Chapter XL. Fig. 333. Master-keyed Lock. Hopkins &Dickinson Mfg. Co. Fig. 334 Hotel-Lock Hopkins &Dickinson Mfg. Co. the others, the shoulders being so sized that the master-keylever will bring the gatings on the locking-levers into line. Figure 333 shows another form of master-keyed lock by Hop-kins & Dickinson. In this instance the regular key and themaster-key work from either side of the lock m the same key-hole on the same tumblers and bolts. Still, each has a differentset of tumbler-rackings and a different post m the bolt. Whenthe master-key is used the bolt-post for the regular key isthrown down by a patent device, and another post broughtup in the second rackings of the tumblers. When the master-key is removed the lock is set in use for the regular key. It is 212 BUILDERS HARD WARE. Chapter XI. Yale & TowneMfg. Co. claimed that 1,200 of these locks can be made, all different,each lock with a key of it own which will
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