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One of the chief causes of accidents to carriages upon the plains arises from the nuts coming off from the numerous bolts that secure the running gearing. To prevent this, the ends of all the bolts should be riveted; it is seldom necessary to take them off, and when this is required the ends of the bolts may easily be filed away.
And even this labour has now been got rid of; for, by an arrangement of the gearing, the slide itself has been made self-acting, and advances with the revolution of the work in the lathe, which thus supplies the place of the workman's hand. The accuracy of the turning done by this beautiful yet simple arrangement is as mechanically perfect as work can be.
Q. Will you explain in detail the construction of the valve gearing, or such parts of it as are peculiar to the oscillating engine? A. The eccentric rod is attached by a pin, 1 inch in diameter, to an open curved link or sector with a tail projecting upward and passing through an eye to guide the link in a vertical motion.
The increased vibration in human nature and in the human brain and heart that go with the motor-car habit, the increased speed of the human motor, the gearing up of the central power house in society everywhere is going to make men capable of unheard-of social technique. The social consciousness is becoming the common man's daily habit.
This point is dwelt upon because it is observed that many engineers find difficulty in freeing themselves from early impressions made by long-stroke engines, express apprehensions at fifty and sixty revolutions, and stand ready to obviate the difficulty by gearing, which it is hoped may not henceforth be adopted in our national ships.
"I am growing as keen on bagging a fine cripple as another man might on bagging a fine tiger," he said. "The whole matter at bottom, I suspect, turns on the instinct of sport. Only the week before last I acquired a rather terribly superior specimen. A lad of eighteen, a factory hand in Westchurch. He was caught by some loose gearing and swept into the machinery.
Of course the lower the gearing the greater is the mechanical advantage in favor of the rider when meeting with much resistance, whether from wind, mud, or steepness of slope. In spite of this, for some reason which I cannot divine, the machines with excessively low gear do not seem to obtain so great an advantage in climbing hills as might be expected.
The huge cylinders drove upwards with a double crank to carry their motion to the screw; and I found that the difficulty of starting and reversing was overcome by an intermediate bevel-wheel gearing and friction clutch, which could throw the motion off the shaft, and allow that instantaneous going astern otherwise impossible in a gas-engine.
She had long ago found her father, and seen him off to O'Callahan's to celebrate the favours of Providence. Now Mary was concerned with a graver matter. Number Two Mine was in danger! The explosion in Number One had been so violent that the gearing of the fan of the other mine, nearly a mile up the canyon, had been thrown out of order.
The cylinder was repaired without being taken out at all. I've seen it weld new teeth and build up old worn teeth on gearing, as good as new." He paused to let us see the terrifically heated metal under the flame. "You remember when we were talking on the drive about the raid, O'Connor? A car-load of scrap-iron went by on the railroad below us. They use this blowpipe to cut it up, frequently.
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