Patent ID: 6085560
Filing Date: 2000-07-11
Classification: E05B,Y10T

Abstract:
A combination pin tumbler mechanical lock and electronic lock set comprising in combination:a lock including a housing with an annular key opening at a front end, a centerline axis, a plurality of axial bores in the housing radially spaced from the axis and aligned with the key opening,a rotatable plug in the housing, said plug rotatable about the axis and including axial bores alignable with the axial bores of the housing, said plug and said housing defining a shear plane transverse to the axis, a plurality of pin tumblers in the bores biased toward the front end for engagement by a key inserted into the lock housing to effect alignment of the tumblers along the shear plane to permit mechanical key actuated rotation of the rotatable plug by a bitted key inserted into the annular key opening and thus actuation of the lock;said plug further including a separate center rod coaxial and co-rotatable with the plug, said rod including a contact member extending axially through the rod and electromechanically accessible at the front end of the rod; anda key comprising an annular barrel for congruent insertion in the key opening, said barrel including bitted key elements for mechanically engaging the pin tumblers to mechanically unlock the lock, said key barrel further including a spring biased axial pin contact in the barrel alignable with the contact member in the plug when the key is inserted in the housing to make an electromechanical contact therewith, said key further including an electronic identification chip affixed thereto, said chip electrically connected to the pin contact, said pin contact and the contact member in the housing defining a circuit when the key is inserted in the housing.