Electronic key for an electrical device

The electronic key for disabling or enabling operation of an electrical apparatus, especially for preventing theft of a hand-held power tool, includes a transmitter and antenna for wireless transmission of a release signal to enable operation of the electrical apparatus. For passive current supply t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DIETMAR HAHN, ROLAND WALTER
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CALCULATING CHECKING-DEVICES COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR COMPUTING COUNTING DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR ELECTRIC DIGITAL DATA PROCESSING GENERATING RANDOM NUMBERS HAND TOOLS MANIPULATORS ORDER TELEGRAPHS PERFORMING OPERATIONS PHYSICS PORTABLE POWER-DRIVEN TOOLS REGISTERING OR INDICATING THE WORKING OF MACHINES SIGNALLING SIGNALLING OR CALLING SYSTEMS TIME OR ATTENDANCE REGISTERS TRANSPORTING VOTING OR LOTTERY APPARATUS
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Beschreibung
Zusammenfassung:	The electronic key for disabling or enabling operation of an electrical apparatus, especially for preventing theft of a hand-held power tool, includes a transmitter and antenna for wireless transmission of a release signal to enable operation of the electrical apparatus. For passive current supply the electronic key is provided with a current supply circuit connected electrically with its antenna, in order to obtain electrical energy from an electromagnetic interrogation signal received by its antenna from the electrical apparatus. The electronic key can include a memory for one or more enabling signals for enabling operation of one or more different electrical units. The electrical apparatus includes a receiver with an antenna for receipt of the release or enable signals and a transmitter for the interrogation signal.