Locks – Operating mechanism – Key
Patent
1997-01-29
1998-10-13
Barrett, Suzanne Dino
Locks
Operating mechanism
Key
70493, 70419, 70409, E05B 2706
Patent
active
058195661
ABSTRACT:
A cylinder lock is provided with a resiliently biased auxiliary locking pin which projects into the keyway, the auxiliary locking pin having a first end which is shaped to in part define a flaring tenon and a second end which engages a locking recess in the lock shell. The cooperating key has a blade with a longitudinal slot shaped, in the manner of a mortise, to engage the first end of the auxiliary locking pin, the depth profile of the mortise increasing from an initial engagement depth to a functional depth. Key insertion causes generation of an axial force which is applied to the head of the auxiliary locking pin to retract the pin second end from the shell locking recess.
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Barrett Suzanne Dino
International Security Products, Inc.
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