Locks – Operating mechanism – Key
Patent
1986-06-16
1987-12-15
Wolfe, Robert L.
Locks
Operating mechanism
Key
70384, E05B 2500
Patent
active
047124024
ABSTRACT:
A lock is re-keyable for sequential use with different ones of a set of change keys, without disassembling the lock or removing or replacing any parts therefrom or therein. A housing of the lock has a bore extending axially therethrough to define a shear interface and receive a plug for rotational and axial movement, with one rearward axial position for operation of the lock and another forward axial position for re-keying. The plug is held fixed rearwardly by a retainer to form pinways. According to which change key currently operates the lock, a particular reset key selectively positions at least one master pin in either the plug portion or the housing portion of the second pinway. The reset key releases the retainer and the plug is moved forward axially to align a third pinway with the master pin in the housing portion or a first pinway with the master pin in the plug portion. The reset key is removed and a corresponding set key is inserted into the lock. The set key transposes the master pin across the shear interface from the housing portion into the plug portion of the third pinway or from the plug portion into the housing portion of the first pinway. The plug is rotated to release the retainer and the plug is moved axially to the operational position. The lock is then not usable with the first change key, and is usable only with the next sequential change key, and with a master key.
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Martine, Jr. Chester E.
Wolfe Robert L.
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