NEW YORK INSTALLS WATER TOWER WITH DOUBLE MAST
Machine Capable of Discharging Four Heavy Streams at One Time
THE New York Fire Department, on March 1st, tested out and accepted a new water tower employing an innovation which has proven itself on one of the towers at present in service, and which was developed by the New York Fire Department Repair Shop.
This feature is a double mast, making it possible to direct two heavy streams on the fire from the mast. one at 65 foot elevation and the other at approximately 35 feet elevation. In the ordinary water tower, where a single mast is employed, the department is limited to one high stream.
On the new water tower a separate mast, placed alongside and parallel to the main mast, is provided. This auxiliary mast, which delivers a stream from a point of about 35 feet high, is supplied by hydrant lines, or engine lines, through a two-way Siamese fitting placed at the lower end of the mast.
The main mast, however, is supplied, as usual in the present towers, through a manifold which may be fed by as many as six 3-inch streams.
Three inlets are provided on each side of the platform, each 3 inches in diameter, and these are brought into a common chamber which feeds the mast through approximately 35 feet of 4-inch hose.
Instead of having two hydraulic cylinders for raising the mast, the tower has three, each 10 inches in diameter. Instead of employing 125 pounds, as is usual in water towers to elevate the mast, it employs but 80 pounds.
Another innovation is the extra deck gun with which the tower is equipped. Instead of having a single deck gun, two are provided, one placed near the rear right hand side of the truck while the other is placed toward the front on the left hand side.
Each deck gun may be fed with six 3-inch streams, for the tower is provided with a three-way Siamese on each side for fire department connection. The two deck guns are cross-connected beneath the platform of the truck so that either one can be supplied by streams attached to either side of the truck.
Thus the double mast and the two deck guns have provision for 13 lines of 3-inch hose to supply them. In addition, provision is made, as noted above, for two streams to supply the auxiliary mast.
The new tower is to be placed in service in the new quarters of Hook and Ladder Company No. 3 on East 13th Street near Union Square.
The tower is drawn bv a six-Cylinder tractor, of 130 horsepower. The entire machine weighs 2400 pounds. It has four wheel brakes, can attain a speed of 45 miles and can be raised in 30 seconds
Incidentally, when all pipes are in operation, the machine is capable of discharging 9,000 gallons of water per minute at nozzle pressures usually employed on large size pipes.
The tower has another feature in its construction— a tiller wheel for manoeuvring the rear wheels to facilitate placing the apparatus into position in front of a building and also for steering when backing into quarters. Instead of having tormentors placed as formerly employed in water towers, this machine utilizes two 4-inch I-beam horizontal extension pieces which are supported by screw jacks on either side of the lower. These I-beams, when not in use, are shoved back under the truck where they are carried without projecting on either side. When the tower is placed in operation, the I-beams are drawn out through their guides and the ends are jacked up, giving a very stable arrangement, and guarding against any possibility of tower overturning when both masts are in operation at high pressure.
Auxiliary tormentors are placed just over the front wheels, to give additional stability and solidity to the apparatus when it is in operation.
The tower was designed and the specifications were written by engineers of the New York Fire Department. It was built by the Seagrave Company of Columbus, Ohio. The auxiliary mast is an invention of Assistant Chief of Department, Thomas F. Dougherty.
The test was conducted by Fire Chief John Kenlon and observed by Fire Commissioner John J. Dorman. Chief Hubert J. Tracy in charge of the department Bureau of Repairs and Supplies, and Deputy Chief Richard J. Marshall, in charge of the Division of Apparatus and Shops. Commissioner Dorman and Chief Kenlon expressed themselves as exceptionally well pleased with the performance of the apparatus. Deputy Chief Marshall said the new tower had lived up to all expectations.