The Jacquard Machine Analyzed and Explained / With an appendix on the preparation of jacquard cards, and practical hints to learners of jacquard designing

by E. A. Posselt

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.