Pulleys on ships
Date
28 October 1691
Creator
Unknown, Artist
Object type
Archive reference number
Manuscript page number
p36v
Material
Dimensions
height (page): 327mm
width (page): 202mm
width (page): 202mm
Subject
Content object
Description
Figure of a system of multiple pulleys called 'Runner and Tackle' on ships (now known as 'block and tackle'). This was described by Edmond Halley at the meeting on 28 October 1691. The drawing was made on the reverse of the rough notes of the meeting.
Object history
28 October 1691: 'Halley shewed the manner and use of the Pullies used on board ships for raising great weights, called a Runner and Tackle, he shewed that the Runner doubled the force of the Tackle, and that in all Tackles with two blocks the force increased as is the number of parts whereby the weight hangs, that is either double, quadruple, sextuple, etc. But with the Runner it was either quadruple, octaple or Doecuple, the force of the hand, or power acting' (JBO/9/60).
Related fellows
Edmond Halley (1656 - 1742, British) , Astronomer
Associated place