Security lock cylinder of tumblered core bevels non-keyed end of control pin for work with counter-beveled finalizing tumbler pin.

摘要

The end of the control pin (37) furthest from the keyed (2) end (40a) is beveled (38) to support the oppose-beveled part (35) of the finalizing tumbler pin (28), both bevels being conical. The control pin (37) parallel to the key center plane is loaded by the key shoulder (42) running transverse to key insertion and the pin (37) can be moved off the end of a groove (41) or key rib edge. Both pin (37) and core (9) are axially divided so their join faces (T) register when the key is out. The control pin (37) is necessarily under spring load in the outward direction of the key channel due to the springloaded finalizing tumbler pin (28). Insertion of the key so moves the control pin (37) as to couple the core halves nonrotatably to one another (9a,9b).