E - Fixed Constructions – 05 – B
Patent
E - Fixed Constructions
05
B
E05B 27/00 (2006.01) E05B 19/00 (2006.01)
Patent
CA 2716696
The invention relates to a locking arrangement having a lock cylinder (17) and a matching key (1); the key (1) having a flat key bit (2) with a narrow spine (3), two broad sides (4) which run substantially parallel to one another, and coding notches (6a to 60 on the front (5), which is opposite the spine, at coding positions (a to f) on the key bit; the lock cylinder (17) having a cylinder housing (18), a cylinder core (20) which is mounted in a bearing hole (19) in the cylinder housing (18) and has a keyway (21) for insertion of the key bit (2), tumblers (23) which are located in core pin holes (26), interact with the coding notches (6a to 60 on the key bit, and are disposed at coding positions on the cylinder, said coding positions coinciding with coding positions (a to f) on the key bit when the locking bit (2) is inserted as far as a stop (9) in the keyway (21), and a sensing member (28) which is located in a supplementary core hole (27) that extends transversely relative to the core pin holes (26) and senses a sensing point (7) on a broad side of the key, the spacing (t), from the spine (3), of the sensing point (7) on a broad side of the key being greater than the spacing (s), from the spine (3), of the apex of the coding notch (6d) that is cut-in to the deepest extent, the sensing point (7) being situated close to a peripheral edge (11) of a coding notch (6b) which is cut-in to a lesser extent than the coding notch (6d) that is cut-in to the deepest extent in such a way that deepening, of the coding notch (6b) which is cut-in to a lesser extent, to the depth of the coding notch (6d) that is cut- in to the deepest extent leads to disappearance of the sensing point (7). In order to improve protection against unlocking, it is provided, first and foremost, that the supplementary core hole (27) is between two immediately adjacent core holes (26) and the sensing member (28) has a tip (29) by means of which the sensing point (7) on a broad side of the key situated between two immediately adjacent coding positions (6b, 6c) is sensed.
Piotrowski Theo
Reine Michael
Blake Cassels & Graydon Llp
C. Ed. Schulte Gesellschaft Mit Beschraenkter Haftung Zylindersc
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