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EP0077101B1
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Electronic lock-key system
Assignee: Individual
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Filing: 1982-10-08
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Granted: 1988-03-30
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Expires: 2002-10-08
Abstract
Abstract The invention concerns a lock and related key of electronic type, which bases the unlocking of the lock on the matching of codes memorized in the lock and in the key, making It possible for one key to unlock a considerable number of pre-selected locks.
Inventors
- 👤 Antonino Invernizzi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 21:57
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00309; G07C2009/00753; G07C2009/00761
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
304 words
An electronic lock-key system in which, upon insertion of a key (20) into a lock (10), a code of the key (20) is compared with a code of the lock (10) and a correspondence between said codes causes the provision of an output signal for actuation of the lock (10), characterized in that one key (20) is associated with a plurality of locks (10), each lock (10) comprising a first memory (11) storing a code, a second memory (12) which is not externally accessible and which contains a code indicating a result of an execution of a related algorithm on said code, a third memory (13) adapted to receive as information a code comparable with the code stored in the second memory (12), means (14) for comparing the codes stored in the second memory (12) and the third memory (13) and, if they match, for providing said output signal, said one key (20) comprising a memory (21) in which are stored a plurality of codes and related algorithms identical with the codes stored in the first memory (11) of said plurality of locks (10) and with the related algorithms, and a microprocessor (23) for receiving, when said one key (20) is inserted into one of said locks (10), the code stored in the first memory (11) of said one of said locks (10), comparing said code stored in the first memory (11) of said one of said locks (10) with the codes stored in the memory (21) of the key (20), executing, on the code stored in the memory (21) of the key (20) which matches said code stored in the first memory (11) of said one of said locks (10), a processing according to the related algorithm, and transmitting the result of the execution to the third memory (13) of the lock (10).
Claim 2
Dependent Claim
304 words
An electronic lock-key system in which, upon insertion of a key (20) into a lock (10), a code of the key (20) is compared with a code of the lock (10) and a correspondence between said codes causes the provision of an output signal for actuation of the lock (10), characterized in that one key (20) is associated with a plurality of locks (10), each lock (10) comprising a first memory (11) storing a code, a second memory (12) which is not externally accessible and which contains a code indicating a result of an execution of a related algorithm on said code, a third memory (13) adapted to receive as information a code comparable with the code stored in the second memory (12), means (14) for comparing the codes stored in the second memory (12) and the third memory (13) and, if they match, for providing said output signal, said one key (20) comprising a memory (21) in which are stored a plurality of codes and related algorithms identical with the codes stored in the first memory (11) of said plurality of locks (10) and with the related algorithms, and a microprocessor (23) for receiving, when said one key (20) is inserted into one of said locks (10), the code stored in the first memory (11) of said one of said locks (10), comparing said code stored in the first memory (11) of said one of said locks (10) with the codes stored in the memory (21) of the key (20), executing, on the code stored in the memory (21) of the key (20) which matches said code stored in the first memory (11) of said one of said locks (10), a processing according to the related algorithm, and transmitting the result of the execution to the third memory (13) of the lock (10).
Claim 3
Dependent Claim
51 words
An electronic lock-key system according to claim 1, wherein the lock (10) comprises a movable locking element having an unlocking position and a locking position and an actuator for moving said locking element between said positions, said output signal causing said actuator to move said locking element to said unlocking position.
Claim 4
Dependent Claim
29 words
An electronic lock-key system according to claim 2, wherein said actuator comprises an electromagnet, connected to a pulse generator (16) via a switch (15) piloted by said output signal.
Claim 5
Dependent Claim
60 words
An electronic lock-key system according to one of the preceding claims, wherein said comparing means (14) of the lock (10) comprises first comparators for singly comparing bits contained in the second memory (12) and in the third memory (13) of the lock (10), and a second comparator for verifying the output of the first comparators for providing said output signal.
Claim 6
Dependent Claim
39 words
An electronic lock-key system according to one of the preceding claims, wherein the key (20) comprises a clock (22) for extracting bits constituting the code in the first memory (11) of the lock (10) according to a predetermined sequence.
Claim 7
Dependent Claim
71 words
An electronic lock-key system according to one of the preceding claims, wherein a card is provided, on which the code and the related algorithm of at least one of said locks (10) are stored, said key (20) comprising means for reading said card and for sending said code and the related algorithm to the memory (21) of the key (20) so as to make it adapted to unlock the lock (10).
Claim 8
Dependent Claim
33 words
An electronic lock-key system according to one of the preceding claims, wherein the key (20) is associated with a pulse strip for feeding pre-established data to activate the circuits of the key (20).
References Cited (Backward Citations)
No citation records indexed.
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