| 摘要 |
<p>A pin tumbler lock cylinder having axially elongated split pin tumbler assemblies each including a pin tumbler and a driver releasably coupled in locked position to prevent rotation of a key plug relative to a supporting cylinder shell. Insertion of a proper angularly bitted key into the key plug causes the tumbler assemblies to axially translate and rotate within bores, defined by the shell and the plug in its locked position, to predetermined releasing positions wherein a split line of each tumbler assembly is aligned with a shear line between the plug and the shell and each pin tumbler is free to separate from its associated driver to permit rotation of the key plug to an unlocked position. Means are provided to prevent rotation of the drivers and tumblers relatively to the shell and plug respectively, when the plug is rotated to an unlocked position. In a master keyed lock cylinder drivers are coupled to pin tumblers by master pins.</p> |
