Builder's hardware; a manual for architects, builders and house furnishers . Fig. 3 51 A. E. Dietz. Fig. 353 Scandinavian & Erwin. laterally. The opposite edges of both sets of levers arenotched, the width of the notches corresponding to the differ-ence between the notches on the keys. Suppose the bolt to beunlocked: when the key is turned, the lower levers are firstpushed to one side varying distances, corresponding to thenotches of the key, and the upper levers are then drawn downand away from the jjost. As the key continues to revolve the levers interlock and thelower ones a
Builder's hardware; a manual for architects, builders and house furnishers . Fig. 3 51 A. E. Dietz. Fig. 353 Scandinavian & Erwin. laterally. The opposite edges of both sets of levers arenotched, the width of the notches corresponding to the differ-ence between the notches on the keys. Suppose the bolt to beunlocked: when the key is turned, the lower levers are firstpushed to one side varying distances, corresponding to thenotches of the key, and the upper levers are then drawn downand away from the jjost. As the key continues to revolve the levers interlock and thelower ones are forced sidewise by the springs, carrying withthem the pivoted upper levers, which rotate so that the slot in 231 Chapter Fig. 354. Giant PadlockSmith & Egge Mfg. Co. 232 BUILDERS HARDWARE. Chapter xi. each lever no longer comes opposite the post. At the sametime, the bolt is shot out. It is evident that the action would be the same, no matter what key were used, only the sets of levers would not interlock \ HO ^n exactly the same J j relation. It is also 7^-5^evident that the only key which will rotate the upper levers so as. to bring each slot Fig. 3 55. Hasp Padlock. Opposite the post Stoddard Lock & Mfg. Co. an(j permit the key,in turning, to draw back the bolt, is the key which last madethe combination between the two sets of levers. This lock hardly comes within the scope of builders hard-ware, but it is too ingenious to pass unnoticed. The CorbinCabinet Lock Company also makes a change lock for drawers,operating on much the same principle. Padlocks. — The subject of padlocks is one which might beillustrated indefinitely, as there are quite as many differentvarieties as have been noted in
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