The mechanism of weaving - Tapa blanda

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 Excerpt: ...forward by pressing down a treadle, and springs j are strong enough to cause needles b to push punches from box g into plate i where holes are cut in the model card, but the card causes j to contract and needles to slide back that are opposite blanks. Carrying plate i is removed to book plates containing the card to be cut, and all are moved under a press either turned by manual power or by an engine. After cutting the card and replacing carrying plate i upon the studs of g, a comb, consisting of 612 pieces of wire driven into a wooden back, drives all punches into punch box g, and a second card is fixed upon the pegs of h to continue the operation. This machine is good, reliable, and simple, but compared with automatic repeaters, the process is slow and costly. The above machine is converted into a very useful repeater by the addition of a frame that supports a carriage on sliding bearings. The carriage a (Fig. 128) generally contains 612 horizontal needles b, arranged in 12 rows of 51 each. Every needle is supported at the front by two perforated plates c, d, the former is forced away from the latter by spiral springs threaded on four spindles, all riveted to c, but passing freely through d. A similar perforated plate /, fixed in the rear of carriage a, supports the back ends Reading-in Machine The first card-cutting machine was patented in England in 1821 by Wilson from a foreign communication. It is still used in many parts of the country, but is being gradually pushed out by modern improvements. As ordinarily arranged, it has 612 endless cords a (Fig. 129), which go round guide rollers b, and are kept in tension by passing each through a bead and hanging a heavy lingoe c upon it. At the back of the machine cords a are led down in a straight line, separ...