The Mueller Tapping Machine.
The high state of development of the automobile is due to the fact that men interested in their production did not rest when they had made a successful machine. They sought to better it, and kept on bettering it until they brought it to its present state. This same policy has brought the Mueller water tapping machine to its present high efficiency. The late H. Mueller was not satisfied with merely inventing and making a machine. He improved it and kept on improving it, each time adding to its effectiveness. The earlier machines were good, so good, in fact, that many of themb are still in use. One man in Texas bought one of the early machines in 1884. He says it still does its work and is as good as ever, even though it lacks the improvements that have been made since. The Mueller water tapping machine of today embodies all the original points of the old one, but it has advantageous conveniences that make the work of tapping easier. There is, however, nothing intricate about a Mueller water tapping machine. Any one can use it by merely following directions. After the body has been securely fastened to the main, the boring bar holding the combined drill reamer and tap is inserted and the brass cap securely screwed down. The gate in the machine body is opened, the feed yoke is thrown up over the collar and the machine is ready for operation. When the main has been tapped the tool is backed out, the gate closed and the tool removed. The corporation cock then takes the place of the tool in the boring bar, and is inserted in the body of the machine, as was the tool. The advantage of this is obvious. The corporation cock must go straight to the tap. It is just like re-inserting the tool or taking a wood screw out and putting it back in the same hole. The Mueller water tapping machine is easily handled, but it has plenty of weight to withstand the heavy strain that is necessarily entailed by tapping heavy mains. Literature giving full descriptions of these machines, the manner of operating, etc., together with complete illustrations, will be furnished on request by either the Decatur. Illinois or New York office of the H. Mueller Manufacturing Company.