Locks – Operating mechanism – Key
Patent
1974-11-12
1976-03-09
Wolfe, Robert L.
Locks
Operating mechanism
Key
70377, E05B 2902, E05B 1514
Patent
active
039423468
ABSTRACT:
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.
REFERENCES:
patent: 730831 (1903-06-01), Lock
patent: 3771340 (1973-11-01), Krakstrom
Oy Wartsila Ab
Wolfe Robert L.
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