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Updated: May 26, 2025
A. The piston rods of all engines are now generally either case hardened very deeply, or are made of steel; and in locomotive engines the diameter of the piston rod is about one seventh of the diameter of the cylinder, and it is formed of tilted steel.
The speed of piston with this number of strokes is 700 feet per minute, and the engine works steadily at this speed, the shock and tremor arising from the arrested momentum of the moving parts being taken away by the counterbalance applied at the discs. Q. Will you describe the principal features of a modern locomotive engine?
There was no inspection, and many of the piston and rod assemblies came back from the motor assembling line as defective. It is a very simple operation. The workman pushed the pin out of the piston, oiled the pin, slipped the rod in place, put the pin through the rod and piston, tightened one screw, and opened another screw. That was the whole operation.
The Superintendent of the Transport Company was named Dorcas, a bustling, heavy-bearded man that you couldn't hold still and that talked fast and jerky like a piston rod. I met him in the Plaza next morning going into the City Hall. "Come on," he says. "We'll fix it. What? Jefe was stuck. Come to me. Now then. Got an idea. Suit him first-rate. You see. Struck me this morning," says Dorcas.
The gasoline comes in here from the tank behind this is called the carburetor, it has a jet to vaporize the gasoline, and the vapour is sucked into each of these cylinders in turn when the piston moves like this." He sought to explain the action of the piston.
The lower part, A, of each cylinder is cooled by water circulating through its casing. The upper part, B, is lined with refractory material, such as fire-clay. The trunk piston, C, is made hollow, and formed with a shield covered by refractory material to protect the packing of the piston and the surface of the lower part of the cylinder from heat.
A. The dynamometer employed for ascertaining the traction upon railways consists of two flat springs joined together at the ends by links, and the amount of separation of the springs at the centre indicates, by means of a suitable hand and dial, the force of traction. A cylinder of oil, with a small hole through its piston, is sometimes added to this instrument to prevent sudden fluctuations.
The fuel burns in the furnace, the water is superheated in the boiler, the steam is directed by the pipes, the piston is moved by the steam pressure, and the fly-wheel rotates because of proper mechanism between it and the piston.
The piston rods enter these arms at a A. The cross head is 8 inches diameter where it is embraced by the connecting rod at e, and 7 inches diameter where the air pump and feed pump arms are fixed on. The ends of the cross head d d, for a length of 12 inches, are reduced to 3 inches diameter where they fit into round holes in the centre of the guide blocks.
He walked as one unseeing, unhearing, hardened to singleness of purpose, heedless of the steepness of the climb, of his blood leaping like a mountain cataract, of his muscles moving with the ease of piston rods; heedless of all but the warmth of the glow enveloping his outer body from the flame burning within.
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