Abstract: A computing device can include a processor; memory accessible to the processor; a display operatively coupled to the processor; and an external shell assembly that includes an array of electronic components, where the array of electronic components includes transducers.

Abstract: An electrically powered pump for a cooling system in a machine such as an electric drive track-type tractor includes a pump housing having a first volute and a second volute, each including a different cooling circuit segment. A drive assembly including an electric motor and a pump shaft is positioned within the pump housing, and a first impeller and a second impeller are mounted on the pump shaft at first and second axial locations on opposite sides of a rotor of the electric motor. The first impeller has a first impeller configuration, and defines a first tolerance sensitivity with the first volute, and a second impeller has a second, different impeller configuration and defines a second, lesser tolerance sensitivity with the second volute. The first impeller may include au open impeller positioned at a first clearance with the first volute, and the second impeller may include a closed impeller positioned at a second, greater clearance with the second volute.

Abstract: A regulator is provided. In one embodiment, the regulator operates as follows. During steady-state conditions, the switching frequency is maintained substantially constant. During start-up and/or in response to an over-current event, the reference voltage is attenuated. For example, in one embodiment, during a soft-start, the reference voltage ramps upward. During the soft-start, the switching frequency is attenuated in proportion to the attenuation of the reference voltage. The switching frequency is attenuated by skipping a number of pulses that is proportional to the reference voltage attenuation, or through another method. In another embodiment, a dynamic over-current protection scheme is employed.

Abstract: A fan assembly, such as a rotary axial fan assembly, is disclosed with a shroud that is adapted to be mounted proximate to a heat exchanger. The shroud is sized for conveying a flow of fluid through the heat exchanger and the shroud. A stator fan blade extends inward from the shroud for supporting a hub generally central within the shroud. A motor stator is encapsulated within the hub for receiving a fan rotor and fan blades for forcing the flow of fluid through the heat exchanger and the shroud. The hub may be formed from a thermally conductive material for transferring heat from the motor stator into the flow of fluid for dissipating the heat.

Abstract: The present invention provides a rotary axial fan and a stator fan for moving air through a heat exchanger for an internal combustion engine cooling system. The fan includes a hub and primary fan blades extending radially from the hub. An annular shroud is attached to the primary fan blades and supported coaxially with the central axis to limit the radial flow of air along the primary fan blades. A plurality of secondary fan blades are interposed between the primary fan blades and each have a first end attached to the annular shroud and terminate in a second end that is not attached to the hub. The stator fan includes a shroud with an array of stator fan blades supporting a hub for the radial axial fan. The size, orientation and material characteristics of the stator fan blades improve sound reduction and heat transfer of the rotary axial fan assembly.

Abstract: Method and apparatus for calibrating a rechargeable battery for mobile telephones and other electronic devices. Calibration is accomplished during a process of completely charging the battery by determining the total amount of charge accepted by the battery during the charging process, and providing a value of total charge capacity of the battery based, at least in part, on the total amount of charge accepted by the battery. The total charge capacity of the battery is used to calculate remaining battery capacity and to predict the remaining operational time of the device. Alternative calibration procedures are provided if the battery is not completely discharged before charging or if the battery is not fully charged by the charging process. The calibration procedures of the invention require no interaction from a user (other than his initiating the normal charging process), and typically permits a calibration to be carried out notwithstanding varying usage habits of different users.

Abstract: Method and apparatus for calibrating a rechargeable battery for mobile telephones and other electronic devices. Calibration is accomplished during a process of completely charging the battery by determining the total amount of charge accepted by the battery during the charging process, and providing a value of total charge capacity of the battery based, at least in part, on the total amount of charge accepted by the battery. The total charge capacity of the battery is used to calculate remaining battery capacity and to predict the remaining operational time of the device. Alternative calibration procedures are provided if the battery is not completely discharged before charging or if the battery is not fully charged by the charging process. The calibration procedures of the invention require no interaction from a user (other than his initiating the normal charging process), and typically permits a calibration to be carried out notwithstanding varying usage habits of different users.