Identifier: americanartistsm21cutb (find matches)
Title: The American artist's manual;
Year: 1814 (1810s)
Authors: Cutbush, James, 1788-1823
Subjects: Technology
Publisher: Philadelphia, Pub. by Johnson & Warner, and R. Fisher, W. Brown, printer
Contributing Library: Duke University Libraries
Digitizing Sponsor: Duke University Libraries

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
he arm of the gib E, and draws up theweight F, as the winch G is turned round.H is the largest trundle, I the next, andK is the axis of the smallest trundle,which is supposed to be hid from view bythe upright supporter L. A trundle M isturned by the great wheel, and on the axisof this trundle is fixed the ratchet-wheelN, into the teeth of which the catch Ofalls. P is the lever, from which goes arope QQ, over a pulley R to the catch ;one end of the rope being fixed to thelever, and the other end to the catch. Sis an elastic bar of wood, one end of whichis screwed to the floor : and, from theother end goes a rope (out of sight in thefigure) to the farther end of the lever,beyond the pin or axis on which it turnsin the upright supi>orter T. The use ofthis bar is to keep up the lever from rub-bing against the edge of the wheel U,and to let the catch keep in the teeth ofthe ratchet-wheel : but a weight hung tothe farther end of the lever would do fullas well as the elastic bar and rope.
Text Appearing After Image:
MEC MEC When the lever is pulled down, it liftsthe catch out of the ratchet-wheel, bymeans of the rope QQ, and gives theweight F liberty to descend : but if thelever P be pulled a little farther downthan what is sufficient to lift the catch Oout of the ratchet-wheel N, it will rubagainst the^ edge of the wheel U, andthereby hinder the too-quick descent ofthe weight; and will quite stop the weightif pulled hard. And if the man who pullsthe lever, should happen inadvertently tolet it go, the elastic bar will suddenly pullit up and the catch will tall down and stopthe machine. WW are two upright rollers above theaxis or upper gudgeon of the gib E : theiruse is to let the rope C bend upon them,as the gib is turned to either side, in or-der to bring the weight over the placewhere it is intended to be let down. N. B. The rollers ought to be so pla-ced, that if the rope C be stretched closeby their utmost sides the half thickness of the rope may be perpendicularly overthe centre of the upper

Note About Images