Circuit arrangement for the electronic code locking of locks

US4499462A · kind A · utility

Assignee

• Battelle Institute e.V. · DE

Inventors

• Klaus Stoesser · Eppstein, DE
• Heinz Vinson · Langen, DE

Key dates

• Filing date: Apr 21, 1982
• Grant date: Feb 12, 1985
• Expiry date: Apr 21, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C9/00682
• WIPO field: Control
• WIPO sector: Instruments

Abstract

The circuit arrangement has a key for the serial feeding in of the code signals and is equipped with electronic arrangements for the storage of the code and for the processing of the signals. In the beginning or at the end of each sampling, a signal is produced and the temporal intervals between these signals are identified as "long", "medium" or "short." The sequence of these signal intervals, that is, the signal pauses, is compared with the stored code. Such a code may be remembered with particular ease as the rhythm of a song or as a melody and is accordingly very personal code. The feeding-in of the code and especially the decoding is acomplished "blindly", that is without return communication. In order to carry out the individual functions, separate construction stages or a microcomputer can be used.