wires extend upward through a similar conduit shown in Fig. 2, which gives an end view of the motor for this press. This conduit insures neatness and safety, and offers protection to the wires. Motors are connected in this way to Miehle, Gordon, and other makes of presses, as well as paper-cutting machines. and book stitchers. Wiring from beneath the floor makes a far neater job than any other method, all wires being concealed and safe from injury. It is necessary to prepare a suitable board on which to place the rheostat; this is a plain piece of wood covered with asbestos and painted with black insulating paint, with the moulding applied around the outside, as shown. An ordinary pipe cleat can be used at top and bottom to secure the board to the conduit, passing stove bolts through both. Place porcelain insulators at the corners of the rheostat, and secure the latter by stove bolts through both. Variable Speed Control Fig. 3 shows a rheostat and motor for a large press requiring several speeds, the compound controller permitting this variation. This controller is made to run on any points desired to obtain the required speed. The motor has an idler to give tension on the belt, though this can be accomplished in several ways. The controller is within convenient reach of the operator. The motor for this press is 4 H. P. The motor shown in Fig. 4 is for the purpose of driving a small line shaft for several small machines. There are several posts in line, like the one shown, each having a box for the shafting. The machines are belted from pulleys on this line shaft to one on the machine, having a tight and loose pulley. This means a considerable saving over some methods, since one motor can thus do the work of several smaller ones. The conduit is shown at the corner of the post, a short one for the motor and a longer one for the switch and starting rheostat. There is a shaft hanger on this post, and a pulley in line with that on the motor. There is also the customary means of adjustment to maintain tension of the belt. The machine shown is a paper cutter. Each floor should have a panel-board for controlling the circuits of the motors on that Birthplace of Rufus Choate, situated on Choate's Island, Mass. Built in 1625. It was the ancestral home of Joseph Choate, late Ambassador to Great Britain. Rufus Choate was a most distinguished lawyer, orator, wit, and statesman. In 1841 he succeeded Daniel Webster in the United States Senate. At the bar and in politics he was Webster's 's greatest rival. He died in Halifax, Nova Scotia, in 1859, at the age of sixty. The old house has been standing for nearly 300 years, and, in spite of its exposed position, is still in a good state of preservation. Birthplace of Count Rumford, Woburn, Mass., the earliest scientific philanthropist. He designed public gardens. He proved that heat is motion and had a glimpse of the great doctrine known later as the Conservation of Energy. Birthplace of John G. Whittier, the Quaker Poet, at Haverhill, Mass. Whittier was one of the leading antislavery agitators of ante-bellum times. More than once he was attacked by mobs, because of his openly expressed opinions. He served one term in the Massachusetts Legislature. Birthplace of the philanthropist, George Peabody. Situated on Washington Street in Peabody, Mass. Peabody settled in London as a banker in 1837. Among his benefactions are the Peabody Institute in Baltimore, a fund for education in the South, and many gifts to colleges. T requires a pressure of 155 tons to supplied by sanitary authorities. Spring Istamp a United States gold double beds, and every medical device for the To stamp a five-cent piece requires 60 tons pressure, and a copper cent requires 40 tons. * * * China has only 5,000 miles of railway as compared with more than 200,000 miles in the United States. At the same time it has a population of 400,000,000, six times as large as that of the United States. There is plenty of work for railroad engineers and contractors in the Celestial Kingdom. * * * Dr. Max Reithoffer, professor at the Vienna Technical High School, who is considered an authority on the wave theory, has, jointly with the court watchmaker, Karl Morawetz, submitted to the common council of that city a plan for an electric system of clocks run by wireless electricity. They propose to furnish the chronometric and electric apparatus, including clocks, to the city free of charge, and to make the trials. The city has only to furnish the current and the cable connections and give the use of suitable buildings. The common council has appropriated $600 for making experiments. If these should lead to the adoption of the project, Vienna would be the first city in the world having a system of electric clocks regulated by wireless connection. * * * The Prussian Ministry of Railways has placed at every important railway center throughout the kingdom a magnificently built and appointed car for the transport of sick persons. These cars have been specially fitted up from plans alleviation suffering during transit have been utilized. There are ice safes, gas stoves for cooking, rooms for attendants, and ingenious devices for muffling the sound caused by the motion of the train. It is not intended to make these carriages pay; they have been instituted chiefly on the ground of humanity. Work on the electric road to the top of Mt. Blanc has commenced. An altitude of nearly two and one-half miles is reached at the terminus. The track is laid on metal ties, and the road will be twenty miles long. Trains will run from bottom to top in four hours, stopping at each station to allow passengers to view the scenery and grow accustomed to the rarefied air. A train will consist of an electric locomotive and two trailers, seating a total of eighty passengers. The line will be completed in 1911. * * * It is claimed that car wheels made from rye straw paper have run 300,000 miles and then been found still good enough to be equipped with a new set of steel rims so that they could go on another similar little trip. * * * The Dominion Coal Company (Glace Bay, Nova Scotia) is testing a machine intended to take the place of explosives. It is a hydraulic cartridge, said to be successful in Great Britain. At present coal is blown down with powder after the undercutting is completed. In the use of the cartridge, after the undercutting and shearing are finished, a hole 31⁄2 inches in diameter is bored in the coal parallel with the roof, wherein the cartridge is inserted. A piston operates at one end and a pump at the other. The pump forces the water along a tube until it comes in contact with the first piston and pushes it out. The pressure becomes general on all pistons, which commence to penetrate the coal in a downward direction. The pistons are set very close, there being scarcely half an inch between them. As the pressure increases the coal gradually leaves the roof and falls to the floor in the best salable condition. When powder is used in blowing down. coal, there is considerable waste through breakage into dust and slack. It is claimed that this element of waste is greatly eliminated by the use of the cartridge, and 40 per cent more salable coal is produced than by the ordinary methods of mining. The weight of the entire apparatus is 44 pounds. One man can operate it. The amount of water required is from a pint to a quart, according to the pressure needed to bring down the coal. The water is stored in a little reservoir attached to a pipe, and runs to the bottom of the pump. The machine is supposed to be especially serviceable in long wall and pillar work. |
