[Illustration: Fig. XI.]
As before mentioned, the heads of the needles are passed through the
needle-board. A drawing of this board, representing the front view, is
shown in Fig. XI. The following are the dimensions:
_a_ to _c_, = 9-1/2 inches. _a_ to _b_, = 2-3/8 inches.
Each side of the prism, always technically called the cylinder, has
a protruding peg about 1/2 inch in length. When in contact with the
needle-board these pegs enter the black holes shown upon either side
in drawing. The 208 needles and holes in the present machine are
represented by a small spot for the former with an outside ring for the
latter.
[Illustration: Fig. XII.]
The lifting of the griffe, which in turn also operates the other parts
of the Jacquard head, as explained before, is not always produced
from above: very often this lifting is arranged to be done by means
of a lever arrangement from below the griffe. This method of working
the mechanism in the Jacquard machine is illustrated by Fig. XII.,
representing the perspective view of a 400 Jacquard machine, (W. P.
Uhlinger, builder).
[Illustration: Fig. XIII.]
Fig. XIII. represents the same machine adjusted to the loom. On the
longer arm of the lever a series of holes are found. These regulate
the height of the lift by the vertical rod which provides the required
movement. The nearer this rod is adjusted to the Jacquard head the
higher the lift of the Jacquard harness, thus forming the shed.