Key with security bar

摘要

A security bar 1 can slide within a key body between the extended position shown in which it prevents insertion of the key blade into a lock and a retracted position in barrel 2. The bar 1 is secured in the extended position until released for retraction by the entry of a code at 3 and following retraction will re-set to the secured extended position. When used in a vehicle lock a switch 5 can be actuated when the bar is retracted to signal an alarm arrangement via 4.