Lock core

Details Lock core Lock core

E - Fixed Constructions

05

B

70/54

E05B 27/08 (2006.01)

Patent

CA 1297689

LOCK CORE ABSTRACT OF THE DISCLOSURE This invention relates to an improved lock core and in particular to one including a cylindrical casing having a plurality of internal steps and a key hole, a spindle, a plurality of upper and lower plug followers, a plurality of helical compression springs, an upper and a lower plug followers stand and a pin. The lock is improved by the provision of a pair of protuberances integrally formed on an upper end of an outer ring on the spindle so that a valid key has a tenon which engages between the protuberances. This improved lock can not be breaked easily unless a legal key is inserted. - 12 -

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