Builder's hardware; a manual for architects, builders and house furnishers . 174 BUILDERS HARDWARE. Chapter xi. to five levers in an ordinary lock, and they are usually placedone over the other, pivoted over the guiding-post, and thebolt-post is so arranged as to fit through one of the cuts, A,when the bolt is thrown back, and through B when thrownout. The connecting gatings, O, are cut at different heights,so that the levers must be lifted unecpially in order to per-mit the bolt to move. When the key is turned in thelock, the bits, which are cut to match the levers, bearagainst the bellies, _
Builder's hardware; a manual for architects, builders and house furnishers . 174 BUILDERS HARDWARE. Chapter xi. to five levers in an ordinary lock, and they are usually placedone over the other, pivoted over the guiding-post, and thebolt-post is so arranged as to fit through one of the cuts, A,when the bolt is thrown back, and through B when thrownout. The connecting gatings, O, are cut at different heights,so that the levers must be lifted unecpially in order to per-mit the bolt to move. When the key is turned in thelock, the bits, which are cut to match the levers, bearagainst the bellies, _D, lifting the levers simultaneously untilthe gatings are exactly on a line with each other. The keythen catches in the talon of the bolt, the bolt-post passes,through the gatings, and the levers drop as the key turns,catching behind the bolt-post and effectually preventing thebolt from being forced back. This is, generally speaking, thefunction of all lock-levers, though there are many variationsfrom the form illustrated. The levers, of course, slide one over the other,
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