OCR Text |
Show Clear Conduits by Explo- sion of Cartridge AN ingenious and simple method of blowing B obstructions out of pipes and conduits has 1 just been patented by E Georges Cheuvrcux Jr. , of New York Such pipes are often placed within the walls of a building and cannot be got at I without cutting through plaster or cement. J When closing such pipes conduits for electric J wires, for Instance plugs of wood or rags are often put in the ends, and the plugs often are forced so far into the tubes that these are ob- j structed, and there Is no tool In the kit that is j effective in extracting the obstructions. Mr. Cheuvicux's Invention is a cap that Is screwed on the end of the tube and has a hole through the middle. The hole is closed with a firing pin which looks like a small knob on the outside. When it is desired to blow out the tube a blank cartridge of .32 calibre is inserted and a blow of a hammer on the knob will explode it. In tests it has been found that a single car-tridge car-tridge cleared a length of 200 feet of pipe of all obstructions. Sometimes it Is necessary to re- k peat t.ie explosion, and in cases of exceptional ' obstruction it may be necessary to use three cartridges one after the other in order to make ' certain that the pipe is quite clear, but In most cases one ccrtrldce does the trick. 'hBibI |