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When Bruce pulled the lever which opened the valve, and heard the hiss of the water when it shot from the nozzle and hit the wheel, and watched the belt, and shaft, and big fly-wheel speed up until the spokes were a blur and the breeze it created lifted his hair, it was the happiest moment of his life.
Kennedy had evidently been revolving something over and over in his mind, for the moment he had switched on the light, he unlocked one of his air-and dust-proof cabinets and took from it an instrument which he placed on a table before him. It was a peculiar-looking instrument, like a round glass electric battery with a cylinder atop, smaller and sticking up like a safety valve.
The upper or delivery valve plate and the lower or foot valve plate should have similar feet. A large part of the strain will thus be transferred from the plates to the door, which can easily be made strong enough to sustain it. It is advisable that the plates should lie at an angle so that the shock of the water may not come upon the whole surface at once.
In racing on the Ohio the engineer sometimes sends the largest of the firemen to hold the safety valve down, and this he does by hanging himself to the lever by his hands. Ralph felt that he had been holding the safety-valve down, and that he was so weary of the operation that an explosion would be a real relief. He was a little tired of having everybody look on him as a thief.
The height to which party feeling was carried in those days had to be experienced before it could be fully understood. Happily for the colony, this evil spirit, during the last three years, has greatly diminished. The two rival parties, though they occasionally abuse and vilify each other, through the medium of the common safety valve the public papers are not so virulent as in 1840.
Ned had constantly to shift the light to keep them in focus, so that Mr. Damon could see where to steer, but, with all this handicap, the eccentric man did very well, and he was never far out in his judgment. "By Jove!" suddenly murmured Tom, as he tried once more in vain to open a clogged valve. "I'm afraid we can't do it. Koku, lend a hand here!" he exclaimed as the giant entered.
Such waking dreamers as he, in whom a too restricted destiny holds in check unemployed forces, heroic faculties, are more numerous than is generally supposed. Dreaming is the safety valve through which it all escapes, with a terrible spluttering, an intensely hot vapor and floating images which instantly disappear.
I know that the lady who sobs behind the footlights is well paid for it, but all the same, it gives me the creeps." "It's nothing serious really it isn't," she explained. "It's merely a safety valve. If women couldn't cry, they'd explode." "I always supposed tears were signs of sorrow," he said. "Far from it," laughed Ruth.
The reason why the Englishman in India is likely to be entirely wrong in his views of Indian government is because he sits on the safety valve of the terrible boiler. He hears every now and then the sharp rush of the confined steam, which startles the ear as it passes.
The system of cellular balloons analogous to the swimming bladder in fishes into which could be introduced a certain amount of air by pumping, had provided for this vertical motion. Without throwing out ballast or losing gas the aeronaut was able to rise or sink at his will. Of course there was a valve in the upper hemisphere which would permit of a rapid descent if found necessary.
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