Chicago : Engineering and Contracting Pub. Co. · leaf 275
of 1909 cleaned some 15 miles of lead in the water mains, where a poor jointhas been made by the calker by allowing thelead to run into the main, which retards theprogress of the water to a certain extent,the machine will cut its way through thelead, leaving a smooth bore without damagingthe joint.… … Fig. 1—Form of Water Main Cleaner. 3, 4, and 6-in. water pipe. Some of themains had been laid for 40 years, yet littledifficulty was encountered in restoring themto their original inside diameter. Figure 1 shows the form of water maincleaner invented by the writer. The formof construction of this…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
