Builder's hardware; a manual for architects, builders and house furnishers . Fig. 294. Section of Cotterills Lock. Fig. 295. Lock. groove on the disk, permitting the whole to be the key is withdrawn the slides are forced in differentdegrees towards the centre, so that the solid portions interceptthe groove in the disk, in which position it is held fast by the LOCKS. 185 fixed ring. It is believed that this lock never has been lock which in its time was a strong competitor Avith the Bramah and Cotterills locks, and was equally im-pregnable, is Day
Builder's hardware; a manual for architects, builders and house furnishers . Fig. 294. Section of Cotterills Lock. Fig. 295. Lock. groove on the disk, permitting the whole to be the key is withdrawn the slides are forced in differentdegrees towards the centre, so that the solid portions interceptthe groove in the disk, in which position it is held fast by the LOCKS. 185 fixed ring. It is believed that this lock never has been lock which in its time was a strong competitor Avith the Bramah and Cotterills locks, and was equally im-pregnable, is Day & Newells Perautopic bank-lock, anAmerican invention which was in great demand at one time,but has long since ceased to be manufactured. It has thecurious property that the key, which is made with movable bits,can be changed at will, so that the lock can be opened only bythe key which was last used to shoot the bolt. The lock hasnever been picked. Figure 29G, which is taken from Price,is too complicated to fully illustrate the workings. Figure296b, while not exactly
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Keywords: ., bookcentury1800, bookdecade1890, bookidbuildershard, bookyear1890
