Abstract: An EAS system in which first and second received signals are independently front-end processed to produce third and fourth signals indicative of the absolute values of the first and second processed signals. The third and fourth signals are then combined and the combined signal passed to a tag evaluation processor for time and frequency domain processing for evaluating whether a tag is present in an interrogation zone. The front-end processing is carried out in such a way that interference signal content including shield interference is extracted without extracting tag signal content in the received signals over a period of time. In this way, the first and second transmitter antennas of the system can be driven with drive signals having a phase difference of other than 0.degree. or 180.degree. and the tag evaluation processing can be carried out during the entire period of the drive signals.

Abstract: An electronic vehicle security system includes a valet switch and status indicator light combined into a single unit. The system includes a central controller having a plurality of sensors connected thereto. The sensors are located throughout the vehicle and generate signals to the controller when an intrusion attempt into the vehicle is detected. In response to these signals, the controller automatically activates an alarm device or an anti-theft device to deter the intruder from entering into or operating the vehicle. The system further includes a combined valet switch and status indicator light assembly. The assembly is adapted to be mounted on the dash panel of the vehicle and is connected through a single wiring harness to the central controller.

Abstract: A voice actuated vehicle security system includes both internal and external microphones for receiving vocal instructions and internal and external speakers for delivering vocal messages. During a training period, a plurality of voice recognition templates are stored in memory representing one or more authorized vehicle operators. A voice recognition and synthesis unit interfaces the microphones and the speakers with a microcomputer and the memory. Various vehicle condition sensors and controls are connected to the microcomputer to permit the system to respond to changes in vehicle conditons by delivering the associated vocal messages and to respond to vocal instructions to control vehicle elements such as door locks, lights, etc.

Abstract: An automotive speed control system uses logic activated switches on both sides of solenoids controlling vent and vacuum valves. A vacuum solenoid is activated upon the simultaneous occurrence of an activation of a vent valve solenoid, an activation of the speed control system, and a determination that solenoid current is below a desired magnitude.