Lock with key-controlled removable and installable plug and...

Details Lock with key-controlled removable and installable plug and... Lock with key-controlled removable and installable plug and...

E - Fixed Constructions

05

B

70/54

E05B 27/00 (2006.01) E05B 9/08 (2006.01)

Patent

CA 1175669

ABSTRACT OF DISCLOSURE A lock having a key-controlled removable and installable plug in- cluding: a plug including a set of combinating tumblers and a control tumbler including a retaining end and a locking end; in a first state the retaining end being extended and the locking end being retracted relative to the plug and in a second state the retaining end being retracted and the locking end being extended relative to the plug; means for biasing the control tumbler to one of the states, the control tumbler including means for engaging with a key to drive the control tumbler to the other state; and a shell for rotatably receiving the plug and having a peripheral groove for receiving the retaining end of the control tumbler in the first state and preventing longitudinal withdrawal of, while permitting rotation of, the plug in the shell; and a longitudinal groove for accommodating extension of the locking end in the second state and enabling withdrawal and installation of the plug when the locking end is aligned with the longitudinal groove.

387007

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