Abstract: A wavelength locker comprising a semiconductor or air gap etalon is used to monitor and maintain the output wavelength of a coherent radiation source. Said etalon may be fabricated from a commercially available silicon wafer, with individual regions of the wafer, each functioning as a separate etalon, etched or otherwise processed to produce different thicknesses. Illumination by the coherent radiation source generated transmitted signal intensities that are detected and processed to determine the output wavelength of the coherent radiation source. A wavelength tuner is then used to maintain or vary the output wavelength based on continuous measurements of etalon signal intensity.

Abstract: A method and an apparatus for use in installing a liner in a conduit as part of a repair procedure, the apparatus including a sealing inlet port (106) for passage of the tubular liner (72) into an enclosed container (52) where an increased pressure is maintained to move the tubular liner into the conduit (179) and to evert it as it moves along the conduit. A clamp (80) holds one end of the liner to the outlet side of an everter box (50) supported on a frame (18) that may be mounted on a trailer hitch receptable. The sealing inlet port includes a pair of lips (112, 114) to press against the opposite sides of a flattened liner. Support members (148, 150) keep the lips from being forced back out toward the outside of the pressurized everter box and control friction between the lips and the liner. Inlet and outlet fittings are provided. The apparatus is portable on a trailer hitch receiver.

Abstract: A wavelength locker comprising a semiconductor or air gap etalon is used to monitor and maintain the output wavelength of a coherent radiation source. Said etalon may be fabricated from a commercially available silicon wafer, with individual regions of the wafer, each functioning as a separate etalon, etched or otherwise processed to produce different thicknesses. Illumination by the coherent radiation source generated transmitted signal intensities that are detected and processed to determine the output wavelength of the coherent radiation source. A wavelength tuner is then used to maintain or vary the output wavelength based on continuous measurements of etalon signal intensity.

Abstract: A method and an apparatus for use in installing a liner in a conduit as part of a repair procedure, the apparatus including a sealing inlet port (106) for passage of the tubular liner (72) into an enclosed container (52) where an increased pressure is maintained to move the tubular liner into the conduit (179) and to evert it as it moves along the conduit A clamp (80) holds one end of the liner to the outlet side of an everter box (50) supported on a frame (18) that may be mounted on a trailer hitch receptable. The sealing inlet port includes a pair of lips (112, 114) to press against the opposite sides of a flattened liner. Support members (148, 150) keep the lips from being forced back out toward the outside of the pressurized everter box and control friction between the lips and the liner. Inlet and outlet fittings are provided. The apparatus is portable on a trailer hitch receiver.

Abstract: An apparatus for use in installing a liner in a conduit as part of a repair procedure, including a sealing inlet port for passage of the tubular liner into an enclosed zone where an increased pressure is maintained to move the tubular liner into the conduit and to evert it as it moves along the conduit. A clamp holds one end of the liner to the outlet side of an everter box. The sealing inlet port includes a pair of lips to press against the opposite sides of a flattened liner. Support members may be used to keep the lips from being forced back out toward the outside of the pressurized everter box, and to control friction between the lips and the liner.