Keys and related magnetic locks to control accesses
First Claim
1. In a magnetic locking system having keys and related magnetic locks, including a codifier circuit with a coded output signal transmitted to an electronic station that decodes and compares the output signal with a predetermined combination and actuates a means for releasing the related magnetic lock if the decoded output signal equals the combination, the improvement comprising a key comprising a bit with at least one recess arranged into at least one row of recesses, the at least one recess oriented transversely to the longitudinal axis of the key and capable being filled with a removable magnetized disk, the magnetized disk oriented in either magnetic polarity along the longitudinal axis of the at least one recess, the two possible orientations of the magnetic field of the magnetized disk and the possibility of an absence of a magnetic field if the at least one recess is empty forming a ternary state system of magnetic fields, the bit adapted to be covered by a slidable plate and provided with structure for holding the plate to the bit;
- and a lock comprising structure for receiving the key, at least one magnetic sensor disposed in juxtaposition in the key receiving structure to the at least one key recess in the key bit when the key is inserted in the key receiving structure, the at least one magnetic sensor detecting a particular state of the ternary magnetic field state system and outputting a corresponding signal to the codifier circuit.
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Accused Products
Abstract
A key composed of a body with recesses which can be filled with magnetized disks, arranged in a combination of norths and/or souths and/or lack thereof, and with a sliding lid holding the magnetic disks in the recesses. The lock has one or two sets of magnetic sensors geometrically ordered according to the refillable recesses. When the key is placed adjacent to the series of magnetic lock sensors, the sensors detect the magnetized disks, pass the detected signal to a conventional converter-codifier circuit that generates a code that is sent, by cable or radio, to a station which interprets the code and, if correct, allows access.
52 Citations
11 Claims
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1. In a magnetic locking system having keys and related magnetic locks, including a codifier circuit with a coded output signal transmitted to an electronic station that decodes and compares the output signal with a predetermined combination and actuates a means for releasing the related magnetic lock if the decoded output signal equals the combination, the improvement comprising a key comprising a bit with at least one recess arranged into at least one row of recesses, the at least one recess oriented transversely to the longitudinal axis of the key and capable being filled with a removable magnetized disk, the magnetized disk oriented in either magnetic polarity along the longitudinal axis of the at least one recess, the two possible orientations of the magnetic field of the magnetized disk and the possibility of an absence of a magnetic field if the at least one recess is empty forming a ternary state system of magnetic fields, the bit adapted to be covered by a slidable plate and provided with structure for holding the plate to the bit;
- and a lock comprising structure for receiving the key, at least one magnetic sensor disposed in juxtaposition in the key receiving structure to the at least one key recess in the key bit when the key is inserted in the key receiving structure, the at least one magnetic sensor detecting a particular state of the ternary magnetic field state system and outputting a corresponding signal to the codifier circuit.
- View Dependent Claims (2, 3, 4, 5)
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6. A key for use with a magnetic locking system comprising:
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a bit with a plurality of recesses, the recesses oriented transversely to the to the longitudinal axis of the key, at least one removable magnetized disk disposed in the recesses, the magnetic field of the at least one magnetized disk oriented in either direction along the axis of the recesses, the two magnetic polarities of the disk magnetic field in combination with no magnetic field of an empty recess forming a ternary state system of magnetic fields, and a plate covering the bit for containing the at least one disk in the recesses, the plate being removable for changing the orientation of the magnetic field of the at least one disk or for changing the location of the at least one disk with respect to the recesses. - View Dependent Claims (7, 8)
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9. A lock for use with a magnetic key, the magnetic key having a means for holding at least one magnetic structure having a magnetic field oriented tranversely to the longitudinal axis of the key, the at least one magnetic field forming of a ternary state system of magnetic fields, the ternary state system comprising a magnetic field of either polarity or the absence of a magnetic field, the lock comprising:
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a body, a structure disposed in the body adapted for receiving the key, at least one sensor disposed adjacent to the key receiving structure for detecting a state of the ternary system of magnetic fields and outputting a corresponding signal. - View Dependent Claims (10, 11)
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Specification