Abstract: A system for controlling whether a battery powered device tethered to a host via a Universal Serial Bus (USB) interface will charge its battery via the USB connection. A USB interface adapter is programmed to control charging of the device battery based on whether a standard data terminal ready (DTR) signal is received from the host through a USB to RS-232 converter. Data packets are sent via the USB data line and interpreted as a DTR signal by the USB to Serial adapter. The dedicated DTR output pin from the adapter is thus used to control the charging circuit.

Abstract: Deformed pipes used for lining host pipes are provided with internal and external inserts to maintain generally U-shaped cross-sectional configuration of the pipe ends. When the pipes are transported to an installation site, the thermoplastic pipe ends with inserts applied match one another, enabling the pipe ends to be fused to one another. Upon locating the pipes within the host pipe, the interior inserts can be removed by floating the inserts through an open end of the pipe or using a “pig” drawn through the pipe.

Abstract: A section of a host pipe is removed, a flange is placed at one end of the host pipe section and split sleeve halves are secured to one another and at one end to the flange to cantilever the split sleeve from the end of the host pipe. A deformed thermoplastic liner is drawn through the host pipe and split sleeve and reformed to its cylindrical configuration by introducing steam under pressure. Once reformed, the split sleeve halves are removed, the end portion of the rerounded liner is cut and an adapter flange is fused on the end of the cut liner portion. The split sleeve halves are reapplied about the rounded liner with the flange on the adapter bearing against an end face of the flanges of the split sleeve.

Abstract: A refrigerator includes an improved air return system providing a channel of air below the crisper pans. Particularly, a separator top is positioned above a separator insulation body to define a space therebetween providing an air flow path for channeling return air flow. An inlet to the space is positioned proximate the front of the separator wall and an outlet is positioned proximate the rear of the separator. An air flow passage through the separator is in communication with the outlet for returning refrigerated air to the freezer compartment.