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

II. Double Lift Double Cylinder Jacquard Machine.

The principle of this machine consists in the combination of two separate Jacquard machines. Two hooks (one of each machine) are connected to one leash of the Jacquard harness, and as each machine is operated alternately, a high speed is attained, which is the purpose of the machine. For example: 140 picks per minute (speed of loom) only requires 70 picks per minute from each part of the double lift double cylinder.

In [Fig. CIII.] this is clearly illustrated. It shows two 12-row machines (E and F) combined, thus giving 24 griffe-bars for the complete double machine, as the griffes work within each other. As explained for double lift single cylinder, every alternate bar is connected with a separate griffe, and these two griffes are worked alternately on the same double lever arrangement.

O to P and O´ to P´, represent the two needle-boards; P to R and P´ to R´, represent the two corresponding needle-boxes.

These double lift double cylinder Jacquard machines are mostly used in the manufacture of turkey-red goods and similar table-cover fabrics, using tie-ups similar to the one illustrated below, which is a combination of the straight-through and point tie-up, which may be alluded to once more by way of explanation in this particular case.

The illustration represents a double lift double cylinder machine containing two 600 machines, which equals an ordinary 600 machine for the tie-up.

Fig. CIII.

This tie-up contains six divisions for the centre straight-through, and requiring leashes 1 to 400 from each part of the double machine. Leashes 1, 12, and 400 (heavy lines) only are illustrated in drawing.

The borders are constructed on the point tie-up, and require leashes 401 to 604 from each part of the double machine. The first and last leash only are illustrated. The margins between border and selvedge are worked by leashes 605 to 612. Centre and border are 12 rows deep, arranged in the comber-board; the margin 8 rows deep, on account of working it (as is generally done) on an 8-leaf satin. One complete row in machine, (both parts), as well as in the comber-board, (illustrated on each side in drawing), is left for the selvedge.

Fig. CIV.

[Fig. CIV.] represents this machine (built by Thomas Halton, Philadelphia,) attached to a Clipper loom. In this drawing both sets of cards (one to contain the even numbers, and the other the uneven numbers) are clearly visible, and also the double lever arrangement for working every cylinder alternately. As the cylinders run at only half speed, the wear on the cards is reduced to a minimum.