Audio device security system

US6140935A · kind A · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Keith Andrew Hayton · Stratford St Mary, GB
• Robert Burnham · Novi, US
• Guenter Dorner · Pulheim, DE
• Thomas Lee Kopicki · Billericay, GB
• Alan Norton · Beverly Hills, US
• Douglas Ralph Sendelbach · Brentwood, GB
• Paul Vinzenz Felten · Elsdorf, DE
• Werner Loebach · Eitorf, DE

Key dates

• Filing date: Oct 4, 1996
• Grant date: Oct 31, 2000
• Expiry date: Oct 4, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C9/33
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An audio device 1 is installed in a motor vehicle with a vehicle security system 2, 3, 4. The radio 1 has circuitry 21 to detect a connection to the vehicle power supply, a microprocessor 11 to inhibit the operation of the radio after an interruption of the connection, an interface 6 and a connection to a bus 9, 10 for communicating data between the radio 1 and the vehicle security system 2, 3, 4, and a data verification unit 15 with a non-volatile memory 13 for verifying data communicated to the radio. Following an interruption of the connection the radio is automatically reset to operational if the data are communicated and verified, and if the data are not communicated or not verified the radio may only be reset manually.