Locks – Operating mechanism – Key
Patent
1994-10-26
1996-08-13
Meyers, Steven N.
Locks
Operating mechanism
Key
70496, 70386, E05B 2902
Patent
active
055445098
ABSTRACT:
A cylinder lock-key-combination, which comprises a lock body (5) having a lock cylinder (6) which is arranged to control a bolt element (4) connected thereto and which encloses a set of locking discs (7) provided with peripheral notches (13) and being symmetrical so that the cutting range of the peripheral notches (13) determining the opening combination of the lock is located on both sides of their axis of symmetry (A). A locking bar (9;10) which in its locked position is located partly in a groove (12) made in the inner surface of the lock body (5) and partly in a slot (17) in the lock cylinder (6) prevents turning of the lock cylinder (6) with regard to the lock body (5). The locking discs (7) can be turned by means of a key of the lock into a position in which the peripheral notches (13) thereof are located at the position of the locking bar (9;10) forming a uniform channel into which the locking bar (9;10) enters thereby releasing the lock cylinder (6) to turn with regard to the lock body (5). According to the invention the locking bar (9;10)is divided in the longitudinal direction of the lock into two separate locking bar elements (9;10) which together with the locking discs (7) cooperating therewith are arranged to form two locking units functionally independent of each other and the opening direction of which being opposite with regard to each other. Said groove (12) located in the lock body (5) for the locking bar comprises a transversal extension (12a;12b) for each of the locking bar elements (9;10) so that the extension (12a;12b) extends in the opposite direction with regard to the opening direction of the locking unit located at the position thereof thereby allowing movement of the locking bar element (9;10) in question into said opposite direction without opening the locking unit. Hence, the cylinder lock can be operated in opposite turning directions by means of two separate keys having quite independent combination cuts.
REFERENCES:
patent: 3621689 (1971-11-01), Koskinen et al.
patent: 3848442 (1974-11-01), Martanen
patent: 4446709 (1984-05-01), Steinbach
Abloy Security Ltd. Oy
Meyers Steven N.
Pham Tuyet-Phuong
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