System with a lock and a key which cooperate according to the transponder principle, as well as a key and a lock for such a system
AssigneeU.S. Philips Corporation
InventorsPeter Priller, Martin Apschner, Werner Wiespointner, Heinz Kwas, Peter Schmallegger, Christian Schwar
Life of this patent
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Abstract
A key and lock system has a key with an integrated transponder coil that is connected to a transponder unit, and a lock with an integrated write/read coil. The key has a key bit portion and a bow portion. When the key bit portion is inserted into an elongated aperture of a key cylinder of the lock, an axis of the write/read coil forms an acute angle with an axis of the transponder coil. The acute angle substantially differs from a zero degree angle.
Claims13
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.
A key comprising:
- 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,
- said key bit portion being insertable into 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.
A lock arranged for receiving 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, said 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.
Dependencies are inferred from the claim text.