Abstract: An apparatus is provided for a gas turbine engine. This engine apparatus includes a shroud, and the shroud includes a wall and a bleed passage. The wall includes an interior surface and an exterior surface. The wall extends circumferentially about an axis. The wall extends depthwise between the interior surface and the exterior surface. The interior surface forms a peripheral boundary of a flowpath that extends along the shroud. The bleed passage includes an inlet orifice and an outlet orifice. The bleed passage extends through the shroud between the inlet orifice and the outlet orifice. The inlet orifice is disposed in the interior surface and fluidly couples the flowpath to the bleed passage. At least a downstream section of the bleed passage circumferentially tapers as the downstream section of the bleed passage extends within the wall towards the outlet orifice.

Abstract: A portable headlight assembly for illuminating a surgical site and moves with the surgeon, the headlight assembly having a headlight source, such as a HID lamp, to illuminate via a light cable coupled to receive and transmit the illumination in the range of natural daylight between 5000 and 6700 degrees Kelvin, a power supply that couples to the HID lamp when the light cable is located to receive focused light from it, and a control that monitors the operation of the headlight source and the portable power supply and is responsive to temperature of the portable power supply and radiation supplying illumination. The light cable extends between the HID lamp to guide illumination from the HID lamp and its reflector to a lens carried on a head strap worn by a practitioner for delivering the illumination to the surgical site.

Abstract: A portable headlight assembly for illuminating a surgical site when look at by a practitioner and moves with the surgeon operates only when the light energy is directed toward the site. A headlight source has a HID lamp to illuminate via a light cable coupled to receive and transmit the illumination in the range of natural daylight between 5000 and 6700 degrees Kelvin. A power supply couples to the HID lamp when the light cable is located to receive focused light from it. A control monitors the operation of the headlight source and the portable power supply and is responsive to temperature of the portable power supply and radiation supplying illumination. The light cable extends between the HID lamp to guide illumination from the HID lamp and its reflector to a lens In a head strap worn by the practitioner for delivering the illumination towards the surgical site to enhance the color spectra of the visual field during surgery providing observation with depth of field and natural coloration.