PICK RESISTANT LOCK HAVING LATERALLY MOVABLE WAFERS
A pick-resistant lock construction in which the rotating plug disposed within a relatively fixed cylinder comprises a plurality of generally planar plug elements each supporting a resiliently urged locking wafer which in relatively unstressed condition engages a corresponding recess in the fixed cyl...
Saved in:
Main Author | |
---|---|
Format | Patent |
Language | English |
Published |
17.12.1974
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | A pick-resistant lock construction in which the rotating plug disposed within a relatively fixed cylinder comprises a plurality of generally planar plug elements each supporting a resiliently urged locking wafer which in relatively unstressed condition engages a corresponding recess in the fixed cylinder. The plug elements define a recess accommodating a wafer, the recess including a laterally extending portion. The wafer includes a corresponding laterally oriented surface which will clear said laterally extending portion of said recess with normal operation of the lock. The wafer executes a small degree of rotational motion relative to a plug element when an attempt is made to rotate the plug element during a picking operation, so that subsequent rectilinear motion of the wafer relative to the plug element imparted by a picking instrument will cause engagement of said laterally oriented surface with said laterally extending portion of said recess to inhibit further longitudinal motion to a degree sufficient to prevent disengagement of the wafer from the cylinder. |
---|---|
Bibliography: | Application Number: US19730410428 |