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US 3,942,346 AGranted
Disc cylinder lock
AssigneeOy Wartsila Ab
InventorReijo Luotolainen
Life of this patent
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AssigneeOy Wartsila Ab
InventorReijo Luotolainen
Estimating the term…
A disc cylinder lock comprising a number of turnable locking discs, which by turning of the key of the lock are turned from a certain initial position to a position releasing the lock mechanism. In the central part of some of the locking discs, there is an opening comprising two portions between which there are at least two substantially radial steps. One of the portions of the central opening receives the key of the lock while the other, when the key is properly inserted in the lock mechanism, forms at the side of the key a free space with a curved border, into which the key does not move in any of the functional phases of the lock. In front of the last mentioned locking discs, there is at least one other turnable element, for instance another type of locking disc, which has also, in its central part, an opening for the key. This opening is so formed that its border, at the point where its distance from the turning axis of the locking discs is the smallest, is located on the turning axis, in its immediate vicinity, or at the same side of the turning axis as the opposite border of the opening.
A disc cylinder lock comprising a number of turnable locking discs, which by turning of the key of the lock are turned from an initial position to a position releasing the lock mechanism, there being, in the central part of some of the locking discs, an opening having portions between which there are two at least two substantially radial steps one, of which portions is arranged to receive the key of the lock and the other, when the key is properly inserted in the lock, forming, at the side of the inserted part of said key, a free space with a curved border, into which said key does not move in any of the functional phases of the lock, there being further, in the lock in front of said last mentioned locking discs, at least one turnable element having in its central part an opening for said key, which opening is so formed that its border, at the point where its distance from the turning axis of said locking discs is the smallest, is located within an area including said turning axis, the space between said turning axis and the opposite border of said opening and an area in the immediate vicinity of said turning axis remote from said opposite border of said opening.
Dependencies are inferred from the claim text.