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 is of unusual neatness and finish.
NO. 6.—SMALL POWER PLANER.
This little engine is similar in action and principle to the cut, No. 1; the iron, to be planed, moving horizontally and longitudinally on a bed, across which the cutting edges move with a downward pressure and a lateral movement, cutting and finishing the surface to the requisite depth and degree, easily and almost to perfection.
The machine works very simply, and almost noiselessly; it is exceedingly handy, and is directed by one person; is very portable; occupies but an inconsiderable space, and does work precisely of the same description as No. 1, though of inferior dimensions in all respects.
NO. 7.—FAIRMAN’S UNIVERSAL CHUCK.
A Chuck generally is explained as being a round plate, which is fastened on to the spindle of a lathe—see No. 5—and is used to bore holes in round or variously shaped plates of metal. It will be observed, in the cut above, that all the upright studs converge toward the centre by one motion of the lever, so that the centre of the article to be bored must correspond with the centre of the spindle. Besides all sorts of plates, as above mentioned, the centres of gear wheels and pulleys are bored by it.
There is a beautiful principle involved in the action of this chuck, though its novelty is in some sort lost in its simplicity. Here, by a simple movement of the hand, the article to be worked is brought to its proper position; while, by the old method, the same position could only be arrived at after a series of trials; nor, in the end, is the article so firmly held, after its correct place shall have been ascertained.