THE EUREKA TAPPING MACHINE.
The Eureka tapping machine, manufactured by Lindley D. Hubbeli, of Hartford, Conn., is one of the oldest and most reliable machines of its class now on the market. Its invention was brought about by necessity; its inventor having tried all the machines available with such poor results that he resolved to build one for his own use. The Eureka is the result. It is used by hundreds of water works and plumbers throughout the country, and is in every case giving perfect satisfaction.
Its operation is very simple; the combined tap and drill being fed downwards by a screw until the drill is through the pipe,and the thread takes hold. Then, by keeping the threadscrew out of the way and revolving the top bar which actuates the main spindle,the tap will be fed into the pipe to the desired depth. After tapping to the correct depth, withdraw the tap until the thread clears, when the spring will carry it up clear of the pipe. Then, by pulling the draw-rod shown on the left side of the machine, the corporation-cock, with its spindle, which is screwed into the cock and not only prevents its getting out of place, but also acts as a plug, in case it is forgotten to shut off the cock before putting it into the machine, will be brought into alignment with the main spindle of the machine and screwed into the pipe, after which open the small air cock on the front of the machine. If the work is all right, no wate will come except that in the machine above the cock. Should water flow, the operator has forgotten to close the corporation, and by screwing the spindle back into the corporation as mentioned above, to act as a plug, the machine may be taken off. the corporation closed, and the spindle removed by hand. There are only two stuffing-boxes on the whole machine—one for the spindle and the other for the draw-rod,both easy of access for packing. The joint between pipe and machine is closed bv a well-fitting rubber gasket. A set of three gaskets, covering all mains from four to twelve inches, is included in each machine, and are all the changes necessary for different sized mains.
For circulars and any information desired address the manufacturer, L. D. Hubbeli, 1500 Broad street, Hartford, Conn.