Abstract: A voice control system for an automotive service system includes a microphone, through which a technician can communicate voice commands to an item of automotive service equipment within the automotive service system, a speech processor module for converting the voice commands into digital instructions which can be processed by a system controller and for converting data from the system controller into synthesized voice audio, and a speaker for communicating the synthesized voice audio to the technician. The system of the present invention may also include a pair of goggles incorporating a heads-up display which displays the data from the system controller by virtual image in the technician's forward field of vision without blocking his general forward field of view.

Abstract: A multi-point serial link protocol, such as USB, is used to transfer vehicle diagnostic information back and forth between vehicle diagnostic sensors and a host computer. Multiple distinct vehicle servicing applications may be added to or removed from the service bay without requiring substantial software changes or revisions. The amount of vehicle diagnostic hardware is also minimized. The multi-point serial link may originate in the vehicle's on-board computer, allowing the vehicle itself to function as a data hub for the diagnostic automotive service sensors.

Abstract: A voice control system for an automotive service system includes a microphone, through which a technician can communicate voice commands to an item of automotive service equipment within the automotive service system, a speech processor module for converting the voice commands into digital instructions which can be processed by a system controller and for converting data from the system controller into synthesized voice audio, and a speaker for communicating the synthesized voice audio to the technician. The system of the present invention may also include a pair of goggles incorporating a heads-up display which displays the data from the system controller by virtual image in the technician's forward field of vision without blocking his general forward field of view.

Abstract: A brake lathe for truing brake rotors includes a tool holder driven by a direct current motor to move a cutting tool radially with respect to the rotor axis in direct proportion to the number of turns of the drive shaft of the direct current motor. A tool feed power control circuit maintains the direct current motor at constant speed regardless of radial forces acting upon the cutting tool and includes a converter/filter circuit, a regulator circuit, a sensing circuit, and a speed control circuit. A speed selection control includes a rheostat for providing a reference voltage corresponding to a select speed. The sensing circuit compares a voltage drop across the direct current motor to the reference voltage and produces an error voltage. The speed control circuit provides a direct current power voltage to the direct current motor in accordance with the error voltage output of the sensing circuit to maintain operation of the motor at constant speed.