Communications: electrical – Continuously variable indicating – With meter reading
Patent
1995-06-30
1998-08-04
Horabik, Michael
Communications: electrical
Continuously variable indicating
With meter reading
34082534, 34082569, 34082572, 34082554, 70276, 70277, 70278, 307 101, 307 102, G08C 1900, B60R 2504
Patent
active
057900434
ABSTRACT:
A process to operate a locking system for lockable objects which features a key module having a remote control unit and a transponder for transmitting and receiving coded signals, and a lock module, fitted inside or on the lockable object, comprising a receiver unit for detection of coded signals, an evaluation unit for verification of coded signals, and a control unit for actually carrying out the unlocking or locking operation on the lockable object. A bidirectional data transmission between the key module and the lock module takes place before unlocking or locking of the object. On receiving an unlocking or locking signal sent out by the key module, the lock module will go into a waiting or standby mode and itself send out control signals by use of a transmission unit. When the user approaches the lockable object, one of the control signals will be received and evaluated by the transponder of the key module. The transponder will then transmit a control signal to the lock module activating the control unit to carry out the requested unlocking or locking operation if the proper control signal is received.
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C. Schneider et al.: "Ein Fahrzeugsicherungssystem ohne mechanischen Schluessel". In: ATZ Automobil-technische Zeitschrift, Column 96 (1994), No. 5, pp. 321-323 and 330. No month.
Doerfler Reiner
Hettich Gerhard
Robitschko Peter
Beaulieu Yonel
Horabik Michael
Mercedes-Benz Aktiengesellschaft
TEMIC Telefunken microelectronic GmbH
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