Abstract: A three-dimensional (3D) geolocation system for providing the 3D coordinates of a moving person in the absence of a Global Positioning System (GPS) signal. The 3D geolocation system uses two inertial sensors configured to be positioned at the left and right foot-ankle structure and a series of sensors to measure the spatial orientation of each segment of the lower limbs (shanks, thighs, trunk) of the user. In one example, the 3D geolocation system uses two additional inertial sensors at the left and right leg-knee or thigh-hip structure as well as sensors providing information indicative of the angular positions of the left and right knee and thigh, which may be provided by an exoskeleton or orthotic devices worn by the user. This determination of the 3D coordinates of the user is performed using biomechanics information about the user from the inertial sensors combined with the knee and hip angles.

Abstract: A series-hybrid powertrain includes a range extender, a battery, an electric motor and a controller. The range extender may include an internal combustion engine and a generator. The powertrain has three modes of operation. In electric only mode, the battery powers the motor and the range extender is not allowed to operate. In forced charge mode, the range extender attempts to power the drive motor and also re-charge the battery if the battery is discharged to, or is found below, a specified charge. In hybrid mode, the range extender is operated by a controller that determines the output of the range extender in hybrid mode considering inputs that relate to the state of charge of the battery and the power consumption of the electric motor. Optionally, the controller uses fuzzy logic to determine the output of the range extender. The powertrain may be used in an industrial vehicle.

Abstract: A lens for an LED having a lens body providing total internal reflection of light emitted by the LED from a first emission point disposed proximate a first junction of the lens body and centerplane. The lens includes an arcuate light-diffusing edge for diffusing light emitted by the LED and reflected by the angular base and sidewall assembly, the light being diffused by the lens at substantially uniform luminance across a sector of at least 150 degrees centered and measured about the first junction. The light diffused by the lens provides for substantially uniform mixing of at least two different colors of light emitted by a multi-color LED apparatus disposed at the first emission point.

Abstract: A domelight which includes a housing body defining at least one light-emitting surface for transmission of light by an LED. The housing body includes at least one contrast surface adjacent the at least one light-emitting surface. The at least one contrast surface includes a first contrast surface disposed on a first side of the at least one light-emitting surface and a second contrast surface disposed on a second side of the at least one light-emitting surface opposite the first side. The housing body further defines a plurality of light-emitting surfaces for transmission of light by a plurality of LEDs. The plurality of light-emitting surfaces are arranged substantially parallel to each other and spaced apart by a contrast surface disposed between each of the plurality of light-emitting surfaces.

Abstract: A lens for an LED having a lens body providing total internal reflection of light emitted by the LED from a first emission point disposed proximate a first junction of the lens body and centerplane. The lens includes an arcuate light-diffusing edge for diffusing light emitted by the LED and reflected by the angular base and sidewall assembly, the light being diffused by the lens at substantially uniform luminance across a sector of at least 150 degrees centered and measured about the first junction. The light diffused by the lens provides for substantially uniform mixing of at least two different colors of light emitted by a multi-color LED apparatus disposed at the first emission point.

Abstract: A high-isolation call cord switch includes connectivity for a standard hospital-style push-button call cord while using low voltage alternating current to isolate detection circuitry from static electricity. An alternating current signal is used to permit transformer coupling, with its intrinsic isolation capability, between the call cord switch and the detection circuit.

Abstract: A switching power supply subsystem can function as a low-power, high-efficiency communications device with performance characteristics suited to a range of applications. Properties such as maximum data rate, output swing, and drive capability are selectable to suit specific applications.

Abstract: A high-isolation call cord switch includes connectivity for a standard hospital-style push-button call cord while using low voltage alternating current to isolate detection circuitry from static electricity. An alternating current signal is used to permit transformer coupling, with its intrinsic isolation capability, between the call cord switch and the detection circuit.