Lifting and Hoisting Devices
Framed jacks and winches with pulleys and screws, with faint studies above
The lower half of this lightly worked sheet is given to lifting machinery: three framed devices are sketched side by side, each combining uprights, a pulley or roller, a central screw or shaft and a base plate, in the manner of jacks or winches for raising a heavy load. Above them a lever or crank arm and fainter mechanical fragments are drawn. The page carries a caption in ordinary left-to-right script together with lines of mirror-writing; none of this text is included in the bundle, and it is not transcribed here.
On this page
Framed lifting jacks and winches
Three timber-framed devices stand in a row along the foot of the page. Each has a pair of uprights carrying a roller or pulley at the top and a vertical screw or rod rising from a broad base, forming a jack or winch to raise a load.
Lever and crank fragments
Above the lifting frames a slender lever or crank arm and a few fainter mechanical fragments are sketched, apparently linkages or handles connected with the hoisting devices below.