THE JACQUARD CARDS.

Fig. XIV.

[Fig. XIV.] represents a single Jacquard card, as required for the 200 Jacquard machine, 1/4 of its actual size. This shows 26 rows of holes in its width and 8 rows in its depth, 208 holes. These holes are shown in black, one for each hook in the machine. Besides these a large hole on each side permit the pegs of the cylinder to enter into the needle-board. The cards are interlaced in an endless arrangement.

Fig. XV.

[Fig. XV.] illustrates four cards laced together. The large holes (marked d in drawing) are peg holes to receive the pegs, h, h´, h´´, h´´´, etc., of the cylinder, as shown in [Fig. IX.] These pegs are movable so that any small variations at cutting with different card-stamping machines can be rectified. The paper used for the cards must be of sufficient thickness to resist the wear caused by the needles, as well as to give steadiness to the cards when resting in the pegs of the cylinder.

The cards are interlaced in an endless arrangement; hence, one card is brought after the other in rotation towards the needles. The cards only refuse service by not fitting properly on the cylinder, i. e., if the peg holes are too near together or too far apart; or if the cards are warped, which is liable to happen in a damp workshop.

A careful examination of the cards fitting on the cylinder is absolutely necessary, otherwise a wrong lifting of the hooks destroying the cards by the pegs punching new holes would result. The cylinder with cards perfectly cut must be set so as to allow the needles to penetrate into the centre of the holes stamped for them in the card. Sometimes the cylinder is set too high or too low—too far in front or too far in rear. To ascertain the proper position, lift the machine and place some paint, or grease from the machine, on the heads of the needles. Afterwards let the machine “fall in,” which will bring the cards against the heads of the needles, producing an impression and indicating the exact position of the needle-heads. The cylinder is always set in its proper position when no marks are made by the entering needles on the margins of the stamped holes and where there are no holes the impression left by the needle head must be equally distant from the surrounding holes.

Fig. XVI.

To get a clear understanding of this examine [Fig. XVI.] illustrating six different impressions of the needles. The circle shown with full lines in each of these six illustrations represents the correct position of the circumference of the hole, and the dotted circles the various errors that may exist.

If the machine produces wrong lifts of the hooks and the trouble is not found in the setting of the cylinder, nor in the hooks or needles, then ascertain if the cylinder is adjusted by means of the lever arrangement, close enough to the needle-board; for if it is not, the hooks will not be pushed far enough from the griffe-bars, and by raising the latter a wrong shed will be produced. When using a great number of cards in a set they are made to fold into a “rack.” This is done by attaching a wire 1 to 1-1/2 inches longer than the cards at the junction of, say every 12th, 15th, or 20th cards. [See c at [Fig. XV].]

The cards fall through a wooden frame, [Fig. XVII]., but the wires attached to the cards, being longer, can not pass through, and the cards will remain suspended, and subsequently fold together in a very compact manner.

Fig. XVII.

In [Fig. XVII.] we illustrate 156 cards arranged with wires attached to every twelfth card, as follows: between cards 156 and 1, 12 and 13, 24 and 25, 36 and 37, 48 and 49, 60 and 61, 72 and 73, 84 and 85, 96 and 97, 108 and 109, 120 and 121, 132 and 133, 144 and 145.

At e, f, g, are shown prisms of the size of the cylinder, by which the cards are guided and regulated in their run towards the cylinder, (direction of arrow); i and h represent round rollers, also placed in rack for guiding cards after leaving the cylinder, c; a and b, the needle-board; c and d, the needles of the machine. S represents the wires as inserted in cards for holding them in the frame.

THE JACQUARD HARNESS.

To the lower end of the hooks (c. in [Fig. V.]) the neck-cords are adjusted. The latter are passed separately through one of the corresponding holes of the perforated bottom board ([Fig. II.]) To these neck-cords are fastened the leashes of the Jacquard harness about 1/2 to 1 inch above the frame containing the rods which guide the neck-cords vertically as the hooks are raised and lowered. The different harness-cords are threaded through the comber-board in various ways called “Tie-ups,” which will be explained later.