Transactions of the Society of Arts Volume 4

Transactions of the Society of Arts Volume 4

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1786 edition. Excerpt: ... I R, T T Aving some time ago seen Mr Pinchbeck's Model of a Wheel Crane, an idea occurred to me for making one to answer the fame purpose, I presume simpler and stronger: My design is, instead of a pair of bellows, to have "a ball so connected to a small horizontal Wheel, that when the Machine moves too fast, it may by its centrifugal force, throw a stop upon the Wheel. A model of such a Machine you will receive by the bearer, the construction of which will be easily conceived without a description of its several parts. Before the weight is permitted to descend, the hook must be drawn back as far as possible. In drawing up the weight, the small wheel is not immediately discharged from the large one, which might cause the Machine to stop when not required; to pre vent which inconvenience, the pieces of brass round the Walking wheel, which receive the hook, are made inclining, so that if the hook drops it does not hold the Wheel. To regulate the force of the ball, move' it higher Or lower upon the brass wire, by which it is suspended. If it appears to you a Machine of this kind would be of any utility, and you think proper to lay it before the gentlemen of the committee, it will be a great favour conferred on s i R, Your most obedient humble servant, Samuel Bunce. Rirby Street, Hatton Street, 15th December, 1785. Mr More. In the second Volume of the Tranfa&ions, page 223, may be found an Account of a Contrivance for preserving Hay Ricks from Rain duting the making, for which the Silver Medal 'was voted to Mr Richard Toft, of Kentish Town-t And it is with much Pleasure the Society observe the Insertion of that Account has induced the ingenious Writers of the two following Letters, to communicate their Thoughts on that SubjecJ, ...show more

Product details

  • Paperback | 54 pages
  • 189 x 246 x 3mm | 113g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236857224
  • 9781236857224