The manufacture of fabrics having woofs of different colors requires
the use of several shuttles and boxes containing the different colors
at the extremity of the driver's travel, in which these boxes are
adjusted alternately either by a rectilinear motion, or by a rotary
one when the boxes are arranged upon a cylinder. The controlling
mechanism of the shuttles by means of draught and tie machines
constitutes, at present, the most perfect apparatus of this nature,
because they allow of a choice of any shuttles whatever.
[Illustration: THE GROSSENHAIN SHUTTLE-DRIVER.]
The apparatus constructed by the Grossenhainer Webstuhl und Maschinen
Fabrik, of Grossenhain, and represented in the accompanying cut, is
new as regards its general arrangement, although in its details it
more or less resembles the analogous machines of Schönherr, Crompton,
and Hartmann. The lifting of the shuttles is effected by two sectors,
a1, a2, arranged on the two sides of the loom, and the rotary
motion of which acts upon the box, c, by means of the lever, b,
the box being caused to descend again by the spring, d. Parallel
with the breast beam there is mounted an axle, e, and upon one of
the extremities of this is fixed the sector, a1, while the other
extremity carries two fixed disks, f1, f2, two loose disks,
f3, f4, and the sector, a2, which is connected with the
latter. The disks are kept in position by a brake, g. The pawls,
h1 and h2, are supported on a lever, i, on a level with the
disks, and are connected with the cam, l, by the spring, k. This
cam revolves with the axle of the loom and thrusts the pawls against
the disk. A draught and tie machine controls the action of the pawls
on the disks in such a way that, by the revolution of the sectors,
a1 and a2, the shuttle-boxes, I., II., III., are brought at the
desired moment in the way of the driver. The pawls, h, are connected
by wires with the bent levers, m, of the draught machine, which
carry also the pawls, n. The upper position of the pawls, h, is
limited by the direct resting of the levers, m, on the tappet, o,
and the lower position by the resting of the pawls, n. The plates,
p, held by the pattern, M, are set in motion horizontally by means
of the eccentric, q, the crank, r, and the bent lever, s. The
raised plates abut against the corresponding levers, m, and thus
bring about the descent of the pawls, h, which are suspended from
these levers. This position is maintained by the resting of the
pawls, n, upon the tappet, o, until the lowering of the
corresponding plate has set the pawl, n, free. The lever, m, then
gives way to the action of the spring, t, and the pawl, h, rises
again. The rotation of the cylinder which supports the design, M, is
effected by the motion of the bent lever, s.
* * * * *