Builder's hardware; a manual for architects, builders and house furnishers . ccordingly,the handles which operate thebolts are placed on opposite sidesof the doors. The same com-pany also manufactures a hotel-lock which is so arranged thatthe locking-bolt can be operatedfrom the inside by a turn-button,instead of a key. When the dooris locked from the outside it canat any time be opened fromwithin by turning the button, sothat it is impossible for an occu-pant to be locked in the room. Figure 335 shows the construc-tion of a Yale Standardhotel-lock. In this case the master-keying is provided f
Builder's hardware; a manual for architects, builders and house furnishers . ccordingly,the handles which operate thebolts are placed on opposite sidesof the doors. The same com-pany also manufactures a hotel-lock which is so arranged thatthe locking-bolt can be operatedfrom the inside by a turn-button,instead of a key. When the dooris locked from the outside it canat any time be opened fromwithin by turning the button, sothat it is impossible for an occu-pant to be locked in the room. Figure 335 shows the construc-tion of a Yale Standardhotel-lock. In this case the master-keying is provided for by asecond set of rackings cut in the levers, so that almost anynumber of variations can be had in a given series of locks, thevariation being entirely in the lower set of rackings. The room-key lifts the levers exactly the same distance as the master-key, but as the proportion between the lengths of the bits,and the height of the lever bellies above the lower key-holeis different in each lock, it is easily understood why no twolocks can be opened by the same Fig. 33 5 Standard & Towne Mfg. Co. CYLINDEa LOCKS. 213 CYLINDER LOCKS. The broad and general principle which distinguishes the or-dinary lever-lock from the style of lock manufactured underthe Yale patents, is that in the latter the mechanism uponwhich the key directly operates is entirely distinct from thelock itself, being enclosed in a cylinder or escutcheon. Thefunction of the key consists simply in so arranging certainmovable pins, slides or other obstructions, that the mechanismis free to rotate, and by its movement, to operate on the locking-bolt. This variety of lock is by no means without a prototype,as we have already seen in the case of the Egyptian, the Bramah and the Cotterill locks; but in its application ithas been simplified and reduced to a marketable form chieflyin this country, and can be fairly claimed as a product ofAmerican ingenuity. Linus Yale invented the lock which b
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Keywords: ., bookcentury1800, bookdecade1890, bookidbuildershard, bookyear1890
