Abstract: A wheel sensor communication system (10) includes a primary coil (30) and a secondary coil (32), which operate as an electromagnetic transformer which is uncoupled mechanically but coupled electrically through a vehicle wheel assembly rotational interface. The electromagnetic transformer provides for the transfer of energy and data from a sensor (18) to a controller (14).

Abstract: A radio frequency transmitter circuit including a user input switch for producing an input signal, an oscillator for producing a frequency signal having a first frequency, an antenna connected to the oscillator for broadcasting the frequency signal, a coupling circuit disposed a predetermined distance from the antenna, and a microprocessor for enabling the oscillator and activating the coupling circuit in response to the input signal. When the coupling circuit is activated, a reflected impedance, derived from a change in inductance, is reflected from the coupling circuit upon the antenna thereby shifting the frequency signal to a second frequency. Sequentially activating and deactivating the coupling circuit modulates the frequency signal.

Abstract: The present invention teaches a hands-free remote entry system primarily for vehicles. This system comprises a base transceiver having wake-up sensors for automatically detecting an object. Once an object is detected, a transmitter within the base transceiver transmits a wake-up/data signal to a fob transceiver. A wake-up receiver within the fob transceiver receives the wake-up/data signal. Upon receipt of the wake-up/data signal, the fob transceiver transmits an identification/data signal, via a transmitter, back to a receiver in the base transceiver. In response to receiving the identification signal, output drivers from the base transceiver actuate a door lock system and an auto theft system.

Abstract: An optical anti-theft system incorporates a member having a plurality of reflective surfaces. The plurality forms a pattern corresponding with the security code. The system additionally incorporates a base for receiving the member. The base incorporates a light source for generating a light beam to illuminate the plurality of reflective surfaces, and a light detector for sensing the illuminated plurality of reflective surfaces and for initiating a security function in response to the sensed illuminated plurality of reflective surfaces having the pattern.