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Updated: June 25, 2025
Again, there was a tremendous waste of power, so that the fuel consumption was out of all proportion to the power actually developed. It was these defects that Corliss set himself to remedy, and he did it simply by taking a load off the governor, which had always been used to move the throttle-valve.
From the boiler the steam goes through the throttle-valve the handle of which is by the driver's side direct to the engine, and there expands, pushes the piston up and down, and by means of a crank on the axle does its work. The engines of modern automobiles are marvels of compactness so compact, indeed, that a seven-horse-power engine occupies much less space than an ordinary barrel.
He opened the throttle-valve just a little, so that but little steam was admitted to the cylinders, and the pistons being pushed out slowly, the driving-wheels revolved slowly and the train started gradually. When the end of the piston stroke was reached the used steam was expelled into the smokestack, creating a draught which in turn strengthened the heat of the fire.
It represents, in the phrase of the inventor, the finger laid upon the throttle-valve of a steam-engine. A minute force becomes the modulator of a much greater force, and thus from imperceptible becomes conspicuous.
Steam is up, and I could do it as easy as not;" and Frank put his hand on the throttle-valve, as if daring Gus to give the word. "Fire up and make her hum!" laughed Gus, quoting Bill's frequent order to his mate, but with no idea of being obeyed. "All right; I'll just roll her up to the switch and back again.
This intensification of cooling goes on until the expansion-temperature is far lower than it was at starting; and if the apparatus be well arranged the effect is so powerful that even the smaller amount of cooling due to the free expansion of gas through a throttle-valve, though pronounced by Siemens and Coleman incapable of being utilized, may be made to liquefy air without using other refrigerants."
I've often done it with Bill;" and Frank cautiously opened the throttle-valve, threw back the lever, and the great thing moved with a throb and a puff. "Steady, old fellow, or you'll come to grief. Here, don't open that!" shouted Gus, for just at that moment Joe appeared at the switch, looking ready for mischief.
A sailor can turn his ship's head at pleasure; an aeronaut has little trouble, by means of his ballast and his throttle-valve, in giving a vertical movement to his balloon. But nothing of this kind could our travellers attempt. No helm, or ballast, or throttle-valve could avail them now. Nothing in the world could be done to prevent things from following their own course to the bitter end.
Morse, with his first message, brought by his servant, the lightning; Fulton, in that long-drawn century of suspense, when he placed his hand upon the throttle-valve and lo, the steamboat moved; Jenner, when his patient with the cow's virus in his blood, walked through the smallpox hospitals unscathed; Howe, when the idea shot through his brain that for a hundred and twenty generations the eye had been bored through the wrong end of the needle; the nameless lord of art who laid down his chisel in some old age that is forgotten, now, and gloated upon the finished Laocoon; Daguerre, when he commanded the sun, riding in the zenith, to print the landscape upon his insignificant silvered plate, and he obeyed; Columbus, in the Pinta's shrouds, when he swung his hat above a fabled sea and gazed abroad upon an unknown world!
The engine-driver shut his throttle-valve with a jerk. Then, holding hard by it, he sharply turned a brass handle. There was a fearful jolt a grating and the train's way was checked. The lieutenant, standing sidewise, had drawn his sword.
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