The Edinburgh Philosophical Journal Volume 6

The Edinburgh Philosophical Journal Volume 6

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1822 edition. Excerpt: ... rest, ) would not be immediately and fully comprehended by all, but give rise to several objections. We must therefore enter into a more particular detail of the uses and construction of the balances, for which the pendulum came to be substituted, in order to show how greatly the old principle fell short of the new, in answering the end of a proper regulator of the work, confining our attention to that part of clockwork to which the invention more immediately belonged, and which is called the Escapement. The old works, then, may in this respect be reduced to two classes. In the first, Fig. 3. Plate VII. the balance TT was supported on a perpendicular arbor MN, the pallets M and N of which acted on the teeth of an upright crown or balance-wheel LL. When Huygens substituted the pendulum, he only at first altered this arrangement, in so far that he fixed on the perpendicular arbor MN, Fig. 1. a pinion, or smaller wheel O, which not having a revolving but swinging motion, as well as the arbor itself, engaged by its leaves the teeth of a larger wheel P, supported on the horizontal part of the bent wire TQR, which transmitted the reciprocal actions of the pendulum and clockwork. By this contrivance, and because the diameter of the wheel P was double or treble of that of the pinion O, Huygens judged that small vibrations of the pendulum would keep the clock going, and that small irregularities in its motion could not disturb the uniform rate or isochronism of the work-f-, --an explanation with which Wallis, who had at first entertained a doubt on this head, expresses himself perfectly satisfied. (Leyden MSS). The second class of clockworks, Fig. 4. had the axis to which the pallets were affixed in a horizontal situation, whilst the balance TT moved in a.show more

Product details

  • Paperback | 144 pages
  • 189 x 246 x 8mm | 268g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236661893
  • 9781236661890