The art of weaving, by hand and by power, with an introductory account of its rise and progress in ancient and modern times . ed; thefront comb-bar being kept stationary by its gauge screws. If the machine has been used for making narrow breadths oflace, the turn-agaui combs and bar are removed, and the backcombs cast anew. If it has been used for making only plain net,without bullet holes, the selvage guides are removed from their bars,and their racking wheels also. The rachet wheel, on the axles of the racking wheels, wliich has * The machine here referred to (the lever machine) was invented
The art of weaving, by hand and by power, with an introductory account of its rise and progress in ancient and modern times . ed; thefront comb-bar being kept stationary by its gauge screws. If the machine has been used for making narrow breadths oflace, the turn-agaui combs and bar are removed, and the backcombs cast anew. If it has been used for making only plain net,without bullet holes, the selvage guides are removed from their bars,and their racking wheels also. The rachet wheel, on the axles of the racking wheels, wliich has * The machine here referred to (the lever machine) was invented by Leavers, of New Radford, in tlie year See Egyptian Shebetz, page 40 of Introduction. LACE MANUFACTURE. 289 eight teeth, must be changed for a new one, with only six teeth;and the guide-bar racking wheel must be removed, and a new onecut, ha\ing three steps or elevations on its circumference. Thecatch-bar wheels, for lifting and letting fall the catch bars, are re-moved ; and others, with three deep notches, are substituted, theirratchet wheels having six teeth. The number of points are to be Fig. 290 THE ART OF WEAVING. doubled; that is, in what is called a ten point machine, twentypoints are placed in every inch. The pump apparatus or lever, for lifting and letting fall the catchbar when either of the point bars come down and go up again,must be disconnected from both point bars. Fig. 140 represents a sectional elevation, taken transverselythrough the machine, for the purpose of showing the forms andpositions of the working parts. The ratchet wheel a, whichusually has eight teeth, must be changed for one of six teeth as inthe figure.—This ratchet drives the notched wheel c?, which gov-erns the half way or dividing stop. This stop must be adjusted, soas to catch and detain the back landing bar t, when the two land-ing bars t, 21, are quite down, or closed together, instead of detain-ing them at a little distance apart, as in the ordinary positions, fo
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectweaving, bookyear1844
