. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature . Velocity, and thus the rate of the clock is regulated. A muchbetter arrangement is a modification of Watts governor, employedby Grubb and Cooke. The governor balls g, g (fig. 38) repose onthe points h, h of the arm KK till they reach their normal velocity,when they fly outwards and bring the point S (tipped with leather)into contact vrith the friction plate p. These clocks are simplein construction and act very well. Newcomb in the Washingtonequatorial has employed a long suspended conical pendulum ; wh
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature . Velocity, and thus the rate of the clock is regulated. A muchbetter arrangement is a modification of Watts governor, employedby Grubb and Cooke. The governor balls g, g (fig. 38) repose onthe points h, h of the arm KK till they reach their normal velocity,when they fly outwards and bring the point S (tipped with leather)into contact vrith the friction plate p. These clocks are simplein construction and act very well. Newcomb in the Washingtonequatorial has employed a long suspended conical pendulum ; whenthis penaulum in the least exceeds its normal velocity (that is, its normal departure from the vertical) it establishes an electrical con-tact which brings friction to bear, and thus reduces the powerapplied to the pendulum. There is occasional tendency to ellipticalmotion, and the clock is otherwise troublesome. In the Repsoldsdriving clock of the 30-inch Pulkowa refractor the conical pendulumis reversed, being a heavy weight at the top of a vertical steel rod,kept in conical rotatio
Size: 1908px × 1309px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidencyclopaedi, bookyear1902
