United States or Sweden ? Vote for the TOP Country of the Week !
The Rotary Spark Gap. In this type of spark gap the two fixed electrodes are connected with the terminals of the secondary coil of the power transformer and also with the condenser and primary of the oscillation transformer.
The ratchet wheel and pawl shown in fig. 48 are part of the lubricator. The wheel drives a brass or gun-metal plug, producing an intermittent rotary motion.
Richard M. Hoe revolutionized newspaper publishing in the late forties by his rotary printing-press, which put out thousands of copies of a paper in an hour. Nor was Elias Howe's sewing-machine any less of a wonder when it came into use about 1850.
Especially interested was I in a rotary engine on ``Barker's centrifugal principle, with which the inventor had prom- ised to propel locomotives at the rate of a hundred miles an hour, but which had been degraded to grinding bark in a tannery.
Hero, of Alexandria, describes an elementary form of such an engine, and the early experimenters of the seventeenth century tried and abandoned the rotary principle. It was not adapted to pumping, and pumping was the only application that then offered sufficient immediate encouragement to persistence.
We are told that after "it" left the railway it was employed by Lord Dundonald to supply steam to a rotary engine; then it propelled a steamboat; next it drove small machinery in a shop in Manchester; then it was employed in a brickyard; eventually it was purchased as a curiosity by Mr. Thomson, of Kirkhouse, near Carlisle, who sent it to Messrs. Stephenson to take care of.
With a sound as of an on-rushing cataclysm the actual storm, cyclonic in all but the rotary motion, came beating down upon the startled earth like a falling wall of air. In less than two minutes the world, the atmosphere, everything had ceased to be. It was a universe of dust and sand, hurtling God knew whither.
They bucked away till noon without much headway, and came in with their gear smashed and a driving-rod fractured. It looked as if we were at last beaten. Number One pulled into McCloud that day eighteen hours late; it was Sankey's and Sinclair's run west. There was a long council in the round-house. The rotary was knocked out; coal was running low in the chutes.
The chant was accompanied with a drum and flute, and had not lasted long before the Dervishes set themselves in a rotary motion, spinning slowly around the shekh, who stood in the centre. They stretched both arms out, dropped their heads on one side, and glided around with a steady, regular motion, their long white gowns spread out and floating on the air.
The hand of a friend will help you in this as in learning to swim, but for floating it is held under the back of your head instead of under your chin. Lie on your back with legs straight before you, feet together, arms close at your sides, and head thrown back; trust the water to bear you up and all that is necessary to keep you afloat is a rotary motion of your hands under water.
Word Of The Day