Abstract: A programmable combination lock with keyed lock override is disclosed. The lock employs a stack of rings and dial wheels, with a mechanism for coupling and decoupling the rings and dial wheels. A user can program a custom code by unlocking the combination and rotating the inner and outer dial wheels until the desired code is indicated, and then locking the combination lock to set the code. A keyed lock with a master key couples to the combination lock and can override a combination lock in the locked state. The keyed lock allows multiple keys to lock and unlock the combination lock. In the event that a user loses the master key, the user can use the second key to create a new lock combination to operate the lock, yet render the lost master key inoperable.

Abstract: A programmable combination lock with keyed lock override is disclosed. The lock employs a stack of rings and dial wheels, with a mechanism for coupling and decoupling the rings and dial wheels. A user can program a custom code by unlocking the combination and rotating the inner and outer dial wheels until the desired code is indicated, and then locking the combination lock to set the code. A keyed lock with a master key couples to the combination lock and can override a combination lock in the locked state. The keyed lock allows multiple keys to lock and unlock the combination lock. In the event that a user loses the master key, the user can use the second key to create a new lock combination to operate the lock, yet render the lost master key inoperable.

Abstract: A reprogrammable cylinder lock provides a lock system that allows a set of multiple keys with various lengths and cuts to work with a single cylinder lock to create multiple lock combinations. The reprogrammable lock comprises a cylinder core, a plurality of pin locks and a cylinder ring placed over the cylinder core in a first set position within a cylinder housing. The plurality of pin locks is configured such that it is initially nonrotatable. At least two different keys are provided. Upon inserting and rotating a first key into the cylinder core, the first key engages with a first lock combination so that the cylinder core is rotatable within the cylinder housing. Upon inserting and rotating subsequent keys into the cylinder core, the subsequent keys push the cylinder ring to subsequent set positions, create new lock combinations, and rotate the cylinder core within the cylinder housing.

Abstract: A reprogrammable cylinder lock provides a lock system that allows a set of multiple keys with various lengths and cuts to work with a single cylinder lock to create multiple lock combinations. The reprogrammable lock comprises a cylinder core, a plurality of pin locks and a cylinder ring placed over the cylinder core in a first set position within a cylinder housing. The plurality of pin locks is configured such that it is initially nonrotatable. At least two different keys are provided. Upon inserting and rotating a first key into the cylinder core, the first key engages with a first lock combination so that the cylinder core is rotatable within the cylinder housing. Upon inserting and rotating subsequent keys into the cylinder core, the subsequent keys push the cylinder ring to subsequent set positions, create new lock combinations, and rotate the cylinder core within the cylinder housing.