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He waved the lantern, but the lighter, with sea and current on her weather bow, forged almost straight ahead, and the straining hawser dragged the launch back. Reaching forward, Dick opened the throttle valve to its limit, and then sat grim and still while the throb of the screw shook the trembling hull. Something would happen in the next half minute unless he could get the lighter round.
A. In some cases canvass valves are used for pumps, with the effect of materially mitigating the shock; but they require frequent renewal, and are of inferior eligibility in their action to the slide valve, which might in many cases be applied to pumps without inconvenience. Q. Could not a form of pump be devised capable of working without valves at all?
When either piston is at the top of its stroke, the revolving valve admits to the upper part of the cylinder a supply of the gaseous mixture from the reservoir and valve casing, and this passes through the generator. At the same time a portion of the charge passes by the pipe, and becomes enriched by admixture of the hydrocarbon oil delivered to it by the cock.
In locomotive engines, with outside cylinders, this condition of the advantageous use of expansion has been made very conspicuous, as has also been the case in screw steamers with four cylinders, and in which the refrigerating surface of the cylinders was consequently large. Q. The steam is admitted to and from the cylinder by means of a slide or sluice valve?
The upper part of the air pump communicates with a small cistern S, called the hot well, through a valve opening outwards and called the delivery valve.
Again, assume the installation to be running under the initial conditions, with the atmospheric valve D and all remaining valves except H closed. Suppose the vacuum again fell to zero from a similar cause, and, further, suppose the atmospheric valve D failed to operate automatically.
An absolute prohibition of the sale of securities, if continued too long, might have brought on some kind of an explosion and defeated the very end which it was sought to achieve. This irregular dealing, as long as it remained within narrow limits and was not advertised in the press, furnished a safety valve by permitting very urgent liquidation.
Jason cursed and lit four molotails at the same time and hurled them two and two in opposite directions. Before they hit he had jumped to the steam valve and wound it open; with a hissing clank the caroj shuddered and got underway. For the moment the attackers were held back by the walls of flame and screamed even louder as the machine moved away at right angles from between their two groups.
"The creature was just a fish," said the Professor shaking his head at the light in Stanley's eyes. "Some sort of giant parasite that inhabits the shells of other fish." He opened the valve of the last air cylinder and seated himself resignedly on the bench. "We have another half hour or so " All of us suddenly put out our hands to brace ourselves. The sphere had moved.
"No you don't! You're my safety valve. If I couldn't come up here and say the things I really feel I'd have to tell it to the Jenny Wrens Aunt Maria hates to have me talk to myself." "But she's good to you, Phœbe?" "Yes, oh, yes! I appreciate all she has done for me. She has taken care of me since I was a tiny baby. I'll never forget that. It's just that we are so different.
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