IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by James Fleming Brown at the Office
of the Commissioners of Patents on the 28th December 1882.
JAMES FLEMING BROWN, of Glasgow, in the County of Lanark, North Britain,
Manufacturer, "IMPROVEMENTS IN LOOMS FOR WEAVING,"
This Invention which relates to certain improvements in Looms for weaving has
reference to that class of looms wherein shifting shuttle boxes are employed for the
purpose of using more than one variety of weft in the cloth and the object is to
enable several shuttles, carrying as many different wefts to be used, without
requiring shuttle boxes with the same or an equal number of divisions or shuttle
receptacles at both sides of the loom.
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The weaving operation to which these Improvements are especially applicable is
that which in certain kinds of cloth has recently become known as 'chintzing,"
and wherein different coloured wefts and rove and ground weft are used
In order to make the Improvements more easily understood it may be assumed
for example that in a web of cloth wherein the "chintzing" is to be woven that
"chintzing" is or may be composed of say three or four different coloured wefts,
each coloured weft carried in a separate shuttle, whilst two other shuttles are used
one for a constant rove and one for the ground weft, thus using five or six shuttles
in all. To work these shuttles as hitherto, a shuttle box, having five or six
divisions or receptacles, has been employed at each side of the loom but according
to the present Improvements I am enabled to dispense with the shuttle box of five
or six divisions at one side of the loom and to substitute a shuttle box with two
divisions therefor and I am enabled to do this by the circumstance that the
chintzing" shuttle is shot across the warp in regular rotation with the constant
rove and ground weft. By means of this arrangement at each twelfth shot the
shuttles have completed a cycle of these operations, so that they have returned to
the positions they occupied at the beginning of the cycle. In starting the loom I
place the constant rove shuttle or the ground weft shuttle on the side of the loom
opposite the "chintzing" shuttles, and the order of the arrangement is such that
when one shuttle box rises or falls, the opposite shuttle box is stationary. At the
end of each cycle of operations any one "chintzing" shuttle can be brought into
operation for any other 'chintzing" shuttle, the shuttle box containing the
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Pin 9.71
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page_text: "
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chintzing" shuttle being moved into the required position to bring such other
chintzing" shuttle into position for working it.-This is effected by varying the
extent of rise or fall of the shuttle box to correspond with the position of the
particular "chintzing" shuttle requiring to be shot. This variation in the rise or
fall of the five or six shuttle-shuttle box, I effect by means of a cam or wiper
having variable throws, each separate or individual throw of the cam or wiper
being regulated to correspond with one of the separate positions for enabling any
one of the "chintzing shuttles to be shot across the warp whilst the step or
supporting part of the cam namely that part which holds the shifting shuttle box
in the position for bringing the constant rove shuttle or the ground weft shuttle
into operation is constant throughout. Or in place of using one variable throw cam
or wiper, several cams or wipers of different throws may be substituted. The
variable motion cam or wiper or cams or wipers as the case may be is (or are)
moved horizontally on the wiper shaft or shafts by a fork or its equivalent and
according to the extent of the horizontal motion thereof, this being regulated by
the Jacquard or pattern apparatus so that any one of the "chintzing" shuttles is
caused by the variable motion cam or wiper or cams or wipers to occupy the position
necessary for being shot through the warp in its cycle with the rove or ground weft
shuttle.
When weaving cloth wherein the same or but one shuttle, corresponding to a
'chintzing" shuttle, is used throughout the web, the cycle of the weaving operations
bereinbefore described is carried out in a loom provided with a double shuttle box
at each side.