Lock cylinder having two sets of tumblers and key therefor

Details Lock cylinder having two sets of tumblers and key therefor Lock cylinder having two sets of tumblers and key therefor

E - Fixed Constructions

05

B

70/54

E05B 15/14 (2006.01) E05B 31/00 (2006.01)

Patent

CA 1266572

LOCK CYLINDER HAVING TWO SETS OF TUMBLERS AND KEY THEREFOR ABSTRACT OF THE DISCLOSURE The usual pin tumbler lock core 16 is provided with an additional set of security disc tumblers 50 adapted to engage contours 77 on the bottom rail of a key and in 50 doing the security tumblers are rotated as the key is inserted in the lock. When the proper key is fully inserted, gates 52a on the security tumblers all align to permit the inward movement of a side bar 62. The key, which is otherwise conventional, has a bevelled tip 82 and a security contour 77 on a lateral surface for activation of the security tum- blers.

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