Abstract: The invention is a new design for a structure such as a stack for exhaust hot gases. One embodiment is that of the top portion of a ship's stack (the watchcap) for exhausting a hot steam plant, a gas turbine, a diesel or other engine, or burner exhaust gases. The function of the invention is to reduce the infrared radiation generated by the hot metal of the exhaust pipe and surrounding structure. This function is accomplished by constructing an annular plenum chamber around a portion of the length of the smokepipe. The plenum chamber has air flow channels, an arrangement of insulation, and openings, top and bottom, so that convective air flow is established at the hot smokepipe wall. The thermal gradient produced also induces a secondary cool-air-flow along an outer wall. Another feature is an arrangement of a double-walled shield extending above, below, and around the terminal end of the smokepipe that blocks the low angle view into the hot smokepipe.

Abstract: This invention is a water chlorinator for disinfecting potable water flowing through a pipe. A diverting inlet diverts a small portion of the water from the pipe. This water is used to create a concentrated chlorine solution by controlled dissolving of calcium hypochlorite tablets. This chlorine solution is then mixed with the water flowing through the pipe at a point downstream from the diverting inlet. The chlorinator uses a tablet chamber to hold the calcium hypochlorite tablets while they are being dissolved, a solution chamber to hold the concentrated chlorine solution before it is fed back to the pipe, and a pressure compensation chamber to adjust the flow rate of the chlorine solution in response to water pressure changes in the pipe. The chlorinator will function whenever there is water flowing through the pipe.