The mechanism of weaving by Fox Thomas W. (Thomas William)

Author:Fox, Thomas W. (Thomas William)
Language: eng
Format: epub
Tags: Weaving
Publisher: London, Macmillan and co., limited; The Macmillan company
Published: 1900-03-25T05:00:00+00:00

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Mill I

Fig. 138.

in a card. The shank of compound catch t passes through the table top and has a helical spring fixed on it by a pin to hold it down; two catches move in the rack of pins, one is fixed to the catch box, but the lower one is free to slide; it is kept in advance of the former by a spring, and the whole box is vertically moved when the left treadle is depressed by lever v upon which t rests, and a rod w attached to lever L As t rises, the sliding catch comes into contact with the teeth of rack 5, weight u pulls back its spring, and carriage r recedes one tooth from the head-stock.

In front of carriage r nipper jaws x are placed to receive a card which is pushed along a guide between the fixed plates of head-stock a, and below all punches c the nipper jaws are opened by depressing y with the left hand, the card is pushed close to a stop and level with the guide plates, the jaws of x close upon it and pull the card with the carriage as the latter slides tooth by tooth through catch t

One bar from the design is read, and one short row of holes is cut at each downward movement of the right treadle, also one pin in rack s is passed as the lifting treadle is depressed. An index cord is tied upon arm 14, led over guide pulleys along the pattern board, and has a small weight tied to the opposite end. One row of a fully perforated card is numbered above the holes progressively and nailed upon the board; when carriage r is close to head-stock a, a knot is tied upon the cord, exactly opposite the first hole in the index card, and as the cutter is working, this knot should always cover a number corresponding with a bar number marked on the straight-edge.

Cards are numbered at one end progressively before cutting to prevent mistakes; the number on a card and that on the design for picks must always be the same.

The numbered end is the 26 side, and is first pushed between the nipper jaws of carriage r; peg and lace holes are cut, then bars from 1 to 26 may be used for design, a bar is left between 26 and 27 for middle lace-holes, and bars from 27 to 51 are for pattern, but with 51 the last peg-hole is cut, and beyond that again the end lace-holes.

Card-lacing

Before cards are ready for the loom they must be laced into a chain; this is still largely a hand process,

CARD-CUTTING

247

although several machines have been invented for the purpose.

For hand-lacing a frame is required with a series of wood or metal pegs fastened in it at both sides to face each other, and at such a distance apart as will suit the width of card to be laced. Cards are placed upon it side

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