EP0029441B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electronic lock with changeable opening code
Assignee: Hb Id-Select Bo Thelin & Co
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Filing: 1980-12-15
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Granted: 1983-11-23
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Expires: 2000-12-15
Abstract
Abstract In an electronic lock comprising a key member and a lock member, the lock member has a random access memory (7) for the storage of opening codes authorizing the opening of the lock. The lock member also has a comparator (6) for comparison of a code received from a key member with each of the opening code stored. The lock member further comprises a programmable read only memory (2) for permanent storage of at least one control code which serves to control the code or codes to be registered in the random access memory (7).
Inventors
- 👤 Sten Tage Lundgren
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:54
CPC Classifications
E; E05; E05B; E05B49/00; E05B49/002; G; G07; G07C; G07C9/00; G07C9/20; G07C9/215
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
An electronic lock comprising at least one key member with a key code identifying said member, and a lock member having means (7, 6) for storage of opening codes authorising opening of the lock, and for comparison of a key code received from a key member with each of. the opening codes stored, characterised by a separate key member, the code of which is a control code different from said opening codes, memory means (2) in said lock member for permanent storage of said control code, comparator means (1) in said lock member comparing each received key code with said stored control code for discriminating said separate key member from other key members, and control means (4, 5, 10-13) serving, on receipt by said lock member of said control code, to influence the storage in the opening code storing means (7) of an arbitrary key code subsequently supplied from a key member other than said separate key member.
Claim 2
Dependent Claim
158 words
An electronic lock comprising at least one key member with a key code identifying said member, and a lock member having means (7, 6) for storage of opening codes authorising opening of the lock, and for comparison of a key code received from a key member with each of. the opening codes stored, characterised by a separate key member, the code of which is a control code different from said opening codes, memory means (2) in said lock member for permanent storage of said control code, comparator means (1) in said lock member comparing each received key code with said stored control code for discriminating said separate key member from other key members, and control means (4, 5, 10-13) serving, on receipt by said lock member of said control code, to influence the storage in the opening code storing means (7) of an arbitrary key code subsequently supplied from a key member other than said separate key member.
Claim 3
Dependent Claim
38 words
A lock as claimed in claim 1, characterised in that the control means (4, 5, 10-13) are adapted to influence the storage of said key code in dependence on the number of times the control code is received.
Claim 4
Dependent Claim
36 words
A lock as claimed in claim 2, charac- teristed in that the control means are adapted to influence the storage by inscription or erasure of the supplied key code in the opening code storage means (7).
Claim 5
Dependent Claim
42 words
A lock as claimed in claim 2 or 3, characterised in that the control means (4, 5, 10-13) are adapted to erase all codes in the opening code storage means (7) on receipt of the control code a predetermined number of times.
References Cited (Backward Citations)
US29259A
Cited
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