IMPORTANT TO PUMPING ENGINEERS.
The following brief description of the Black Squadron Combination Fibrous and Metallic Four Wedge Packing will prove interesting: Among the large number of packings offered it is sometimes a difficult matter for the engineer to decide which is best suited to his particular needs. Of course, all manufacturers are willing to put their packings in on a guarantee to do the work, or no pay; they will not guarantee, however, to reimburse the engineer for all the trouble their packings cause in case they fail, in spite of the guarantee, yet the damage they do often amounts to three or four times the cost of the packing. The attention of the readers of this journal is directed to a packing that is working with particular success in a very large number of the best equiped municipal pumping stations, not only in this country. but all over the world. It is made by the Cancos Manufacturing company, of Philadelphia, and is called “Black Squadron.” It is composed of four wedges, three of triangular shape, as shown by the illustration—two of these are formed of the finest cotton duck and rubber that is made: the third is a soft metal which goes next the rod, and has proved particularly adaptable for the work. These three wedges are capped by a cushion that absorbs all oil and keeps the rod lubricated; the whole are incased in a network of particularly rough material, and it is this that is next the rod and receives the brunt of the wear. After the packing is prepared for the market, it is thoroughly saturated with a special lubricating compound that takes on a gloss as smooth as glass after the piston has passed over it once or twice. The particular feature about it is that it does not wear off in a few days, as is the case with other packings; but on examination months afterwards it looks as good as the day it was put in the stuffing-box. There is practically no friction under the highest pressures, as the surface next the rod is absolutely solid and smooth, while the sliding wedge formation of the packing allows it to bend, expand and contract, to meet all the conditions of the rod. “Black Squadron” is not a new packing. It was patented and placed on the market on January 20, 1903. Thus, ample time has passed for defects to show up, if there were any. It has been in continuous use in many large municipal plants ever since; in fact, it has been on the two 5-ft. plungers, having 12-ft. stroke, of the largest pumping engine in the world for over a year, and has given entire satisfaction. While the Cancos companv makes a specialty of this packing, it manufactures packing for every purpose. Catalogue and other matter will be sent on request.
Dracut. Mass., after having gone for years without fire protection and suffered from several disastrous fires, is now about to equip a fire company at a cost of $1,000,