Patent ID: 6150952
Filing Date: 2000-11-21
Classification: G07C

Abstract:
A key and lock system comprising:a key having a key bit portion and a bow portion, said bow portion comprising a transponder unit and a transponder coil which is coupled to said transponder unit, said transponder coil having a transponder coil axis perpendicular to a transponder coil surface defined by transponder coil windings;a lock comprising a cylinder holder with a bore, and a key cylinder having an elongated aperture therein for receiving said key bit portion, said key cylinder being rotatably comprised in said cylinder holder, and said elongated aperture extending in a longitudinal direction perpendicular to an outer surface of said key cylinder, said lock further comprising a write/read coil inductively coupleable to said transponder coil through insertion of said key bit portion into said elongated aperture, said write/read coil having a write/read coil axis perpendicular to a write/read coil surface defined by write/read coil windings, and said write/read coil being arranged in said cylinder holder with said write/read coil windings surrounding said key cylinder,said write/read coil axis forming a first acute angle with said transponder coil axis when said key bit portion is inserted into said elongated aperture, said first acute angle substantially differing from a zero degree angle.