[Illustration: 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.
[Illustration: 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.
[Illustration: 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.
Fig. A shows the cylinder set in its proper place, which is indicated
by the impression of the needle in the centre.
Fig. B shows the cylinder is set too high, as indicated by the
impression of the needle. [See arrow.]
In Fig. C the cylinder is set too low.
In Fig. D the cylinder is set too far to the left.
In Fig. E the cylinder is set too far to the right.
In Fig. F the cylinder is set too low and too far to the right.
In Fig. G the cylinder is set too low and too far to the left.
In Fig. H the cylinder is set too high and too far to the left.
In Fig. K the cylinder is set too high and too far to the right.
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.
[Illustration: 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.