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I think he slipped up when he commented on that helical what's-it, then covered his slip by pretending he'd only leafed through the texts and picked up a bit here and there. I know when that boy's fooling, and I know he deliberately fluffed the questions Jerry put to him. Timmy's just plain lousy when it comes to dissembling, you know, as if it was completely foreign to him to lie.
The ring-type emergencies are now all adjusted so that they normally run concentric with the shaft, but weighted so that the center of gravity is slightly displaced from the center. The centrifugal strain due to this is balanced by helical springs.
At the end of a minute a dull splashing reverberated from the bottom of the well; the helical twist he had imparted to the rope had reached the grapnel below. "Haul!" said Fairway; and the men who held the rope began to gather it over the wheel. "I think we've got sommat," said one of the haulers-in. "Then pull steady," said Fairway.
At the end of a minute a dull splashing reverberated from the bottom of the well; the helical twist he had imparted to the rope had reached the grapnel below. "Haul!" said Fairway; and the men who held the rope began to gather it over the wheel. "I think we've got sommat," said one of the haulers-in. "Then pull steady," said Fairway.
Passing through it to the other end, Prestonby unlocked a door, and they went down a short hall, to where ten or fifteen boys and girls had just gotten off a helical escalator and were queued up at a door at the other end. There were two Literate guards in black leather, and a student-monitor, with his white belt and rubber truncheon, outside the door. Prestonby swore under his breath.
To give the water a rotary motion he had inserted a helical piece of angle iron, and so prevented deposition.
They turned in on the left by the church with the Italian porch, whose helical columns were heavily draped with creepers, and pursued the lane till there arose on Jude's sight the circular theatre with that well-known lantern above it, which stood in his mind as the sad symbol of his abandoned hopes, for it was from that outlook that he had finally surveyed the City of Colleges on the afternoon of his great meditation, which convinced him at last of the futility of his attempt to be a son of the university.
When the pilot valve is closed, the pressures can accumulate beneath the piston C and raise the main admission valve from its seat. When the pilot valve opens, the pressure beneath the piston is relieved and it is seated by the helical spring above. The valve may be opened by hand by means of the lever K, to see if it is perfectly free. The secondary valve is somewhat different in its action.
The action of the governor depends on the balance of force exerted by the spring, and the centrifugal effort of the rectangular-shaped weights at the lower end; the moving weights acting through the knife-edge suspension tend to pull down the lever against the resistance of the heavy helical spring.
It will be at once obvious that these words describe perfectly the basic principle of every modern phonograph or other talking-machine, irrespective of its manufacture or trade name. Edison's first model of the phonograph is shown in the following illustration. It consisted of a metallic cylinder having a helical indenting groove cut upon it from end to end.
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