Mechanick powers; or, The mystery of nature and art unvail'd ... Together, with a treatise of circular motion artificially fitted to mechanick use, and the making of clock-work, and other engines ... The whole comprized in ten books, and illustrated with copper cuts / By Ven. Mandey, Philomat [and J. Moxon].
- Venterus Mandey
- Date:
- 1702
Licence: Public Domain Mark
Credit: Mechanick powers; or, The mystery of nature and art unvail'd ... Together, with a treatise of circular motion artificially fitted to mechanick use, and the making of clock-work, and other engines ... The whole comprized in ten books, and illustrated with copper cuts / By Ven. Mandey, Philomat [and J. Moxon]. Source: Wellcome Collection.
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![required a Weight of 50 Pounds, and the Weight defcend 20 Feet; keep- ing the fame Defcent, a Weight that fhall move the Clock 24 Hours will require to be roo Pounds, Page 89' Prep. IX. In Difpafto, or two Pulleys,, if the Chord of the movable Pulley be only turn’d about the Wheel, and is not faftned to its SnatcH-block,or Weight, but to the immovable Point, the Power will be only doubled, which draws by the other end, 90 Prop. X. In Difpafto, or two Pulleys, if the end of the Rope be faftned to the moveab]e Snatch-block, and the Rope be turned about the fame Wheel, the Power will be tripled, or threefold, 91 Prop. XI. InTriipafto, or three Pulleys, if two Pulleys are immovable, and one only movable, the Power is tripled, 92 Prop. XII. In Trifpafto. or three Pulleys, two of them being movable in the Snatch-block, quadruplicates the Power, 9^ Prop. XIII. If the Lower Snatch-block be movable, and the Power draw upwards, the Power is fo many times multiplied, as are the drawing of the Chords, 94 Prop. XIV. If the lower Snatch-block be moveable, and the Power draw downwards, the Force of the Power is fo many times multiplied as there are Drawings of the Chords, one lefs, ibid\ Prop. XV. If the lower Snatch-block be movable, and the Rope be faftned to the moveable Snatch-block, the lower Pulley doubles the Power, and. renders one upper Power only equal to the Weight, 95 Prep. XVI If the lower Snatch-block be moveable, and the Rope faftned to the upper ; as many Pulleys as are below, fo many times the Power is doubled, the upper ones ferve only for Convenience, ibid* Prop. XVII. To difpofe Pulleys fb, that, according to the number of the Pulleys, the Power may always be increafed double in a continual Pro¬ portion, ■ 95 Prop. XVIII. By Pulleys,, any Weight may be moved by any Power, 97 The CONTENTS of the Fifth BOOK. OF the Screw, Page 98: Prep. I To explain and'meafure the Force oi the 'crew, 99- Prop. II. The divers Ufes of fmgle Screws, roo Prep. III. Of Compounded Screws,, j«i* r f • • • • The CONTENTS of. the Sixth BOOK. ! .. .... ■ ■'■■■ h 'ill ■ - : £ ' , ' ■ ■' ^\F the Wedg, 104'. Prop. L The force of the Wedg exp's iinedr ibid PrII. The fliarper the Wedges- are,., the. greater force they add to the-. Power,. 10 6 prop. 11). Divers kinds of Wedges, Prop. IV. Of PercufHon, or Smiteing,. J07; ibid. Prop. V. Divers meafures of Percuflion^ Prep, YL The jneafiire ofPtrcyf£o% J-2 O 3J2.](https://iiif.wellcomecollection.org/image/b30500035_0014.jp2/full/800%2C/0/default.jpg)
