LITMIR.BIZ

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or dexterity could possibly equal.

      It is the creation of these various power-tool-machines, which, as I have stated, is indispensable for the building of power-machinery of any kind; from the marine-engine, which drives the huge steamships of Cunard or Collins over the wild surges of the Atlantic, with all the punctuality, and nearly all the speed of birds of passage; from the locomotive, with its team of iron chargers, bringing the farthest west to our very doors in the oceanic cities, to the fast power-presses, which roll off the news, collected from the uttermost ends of the earth by the agency of steam and lightning, at the rate of 20,000 copies to the hour – and intellectually feeding their hundred thousand hungry readers or ere the paper is well dry – freighted with the fates of nations.

      And it is to the creation of these, in their best form and utmost perfection, that the great works at Matteawan, a lovely spot, embosomed in the grandest part of the Highlands of the Hudson, are devoted; while the Depots in New York are intended to keep, at all times, on hand a large supply of tools, required by machinists of all classes, particularly needed in the railroad and machine shop, and such, in a word, as cannot be dispensed with by any of those artificers, who work upon the tough and stubborn produce of the mines.

      All these tools are either manufactured by the Messrs. Leonard themselves at the “Matteawan works,” employing some three hundred and fifty hands, or furnished from the “Lowell machine shops,” where from five hundred to a thousand hands are constantly employed in this class of business; or, again, from “The Great Hadley-Falls shop,” at Holyoke; all of which establishments are represented by the same firm, and all of which turn out work, which – it is believed – cannot be surpassed, if equalled, in the world.

      The first of these machines which we propose to notice, a representation of which stands at the head of this paper, is perhaps one of the most important, if not the most important of all the tools employed in the machine shop.

      This engine has already been noticed in Graham, as employed in the noble press-works of Messrs. Hoe & Co., of New York – vol. XL., No. 6, p. 576. It is used for finishing the surfaces of whatever portions of the machinery must be brought to a smooth and polished face. This is done by the propulsion of the pieces of iron to be planed in a horizontal and longitudinal direction against cutting edges, which again move horizontally across the moving planes, and are pressed downward on them vertically, so as to effect the planing to the uniform depth required. The abraded portions of the metal are thrown off – from the surface of cast iron in a sort of scaly dust, from that of wrought iron in long curled shavings – and the planes can be wrought up to almost any desirable degree of smoothness and finish.

      It is but a short time, comparatively, since this machine was first introduced: it is one of the most important among mechanical tools; and it is indeed a triumph of art to see one of these machines under the direction of one person, performing the usual labor of some fifteen or twenty mechanics in former times with their chisels and files. Art observes, and experience confirms the fact, that machinery can and does perform work much more accurately than the most skillful mechanic; and, perhaps, in no instance is this general principle so happily illustrated as in the performance of these machines. The usual cost of motive power is about twenty-five cents per day, per horse power, and allowing one horse to be equivalent to five men, we shall have the labor of one mechanic furnished for five cents a-day. From this it will be seen how important every invention or improvement becomes to the machine-builder, which tends to perform the usual labor on the machine by machinery.

      The above cut represents a very excellent planer. There is a great degree of taste and finish employed in its design; indeed the builder may flatter himself that he has one of the best machines built in this country.

      This machine, according to its size, weight, and cost, is divided into Nos. 4, 5, and 6, capable of planeing metal from four feet long, by eighteen inches wide and high, to six feet six inches long, by twenty-four inches wide and high – and weighs respectively 1000, 2,600, and 3,500 pounds.

      The machine from which the design at the head of this paper is taken may be seen at No. 60 Beaver Street, New York.

      This again is a highly valuable and ingenious machine; its special operation is, as its name implies, the turning of any iron work to its required round circumference and requisite degree of polish, whether it is a perfect cylinder, or of various diameters at various points.

      By it, all round work for engines is formed and finished – as rods, shafts, and the like. The action of the machine is simple, easy and almost noiseless. The piece of metal is fixed in the spindle, shown in the cut above in contact with the right elbow of the spectator, and secured, longitudinally of the machine, on the sharp point proceeding from the fixture at the left end of the Lathe, behind the operator’s shoulder.

      To this, the object of operation, a rapid rotatory movement on its own axis is given by steam-power, and the cutting is produced by its rotation against two steel edges impinging on it laterally, and made to travel horizontally and longitudinally on a bed, so as to cut the bar, submitted to its agency, equally throughout all its length. This instrument is also directed by one man only, while acting with the combined power of very many, and performs its work with an ease equalled only by its great exactitude.

      For the benefit of those of our readers, who have no previous acquaintance with mechanism, we shall merely premise that a gear is a wheel with a toothed circumference, like watch-wheels, or what in ruder mechanism are known as cogged-wheels; and those gears, known as level gears, are such as have the toothing on the circumference not perpendicular to the plane of the diameter, but at an acute angle to it, so that when two gears of a peculiar degree of bevil are set in contact, a horizontal rotatory movement may be communicated to one by a corresponding perpendicular rotation of the other. This will be rendered comprehensible by a careful examination of the motive power of the borer in the representation of the instrument, No. 5.

      The above cut represents a very cheap and simple gear-cutter. Its principal novelty consists in the use of the large gear-wheel instead of the common graduated table. It is extremely simple, and at the same time possesses all the advantages of the old machine. It will be observed that the crank is connected to the large wheel by a set of intermediate gears, every revolution of which is made to correspond with the number of teeth in the wheel to be cut. This is accomplished by a set of change gears, which accompany the machine.

      The changes are made in the opposite end of the Crank Shaft.

      It will be observed that one revolution of the crank bears the same relation to the number of teeth in the large wheel, as one tooth in the wheel to be cut bears to the whole number it is to contain. The number of teeth and the pitch of the wheel is consequently derived from the change gears.

      When level gears are cut, the head is then set at the proper inclination, and secured by the screw which projects at the rear of the head.

      The cheapness of this machine more particularly recommends it, the price being but $250, while its efficiency and regular operation are so well established as to require no further comment.

      This is another admirable engine for diminishing and simplifying human labor. It is applied to the boring of all kinds of iron-work for machinery.

      The perpendicular drill, as will be readily observed, is worked with a swift, rotatory movement, by means of the bevil gears at its upper extremity. By a wheel – the circumference of which only is displayed in the cut – acting upon the thread of a screw midway its length, it is pressed down upon the piece of work to be drilled.

      This piece is secured upon a horizontal table placed under the point of the rotary drill, which table may be elevated or depressed at pleasure, by aid of the small lever projecting backward, which acts on a geared wheel playing on the thread of the great perpendicular screw of the main shaft.

      The nature, operation, and application of power in this engine are precisely similar to those shown and explained at No. 2. But it is employed only for the cutting of screws and screw bolts, and the boring of plates, pulleys, etc., which latter operations it performs by aid of Fairmen’s Universal Chuck, which will be described hereafter. In working this lathe, the implement last named is attached to the spindle, immediately under the right hand of the operator.

      The engine itself

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