IMPROVEMENTS IN THE WEAVING OF "DHOOTAS" AND IN APPARATUS THEREFOR
Year: 1885

page_text: "
therefor.
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i
I, WILLIAM GADD, of 64 Barton Arcade, Manchester, Civil and Consulting
Engineer, do hereby declare the nature of my invention for "IMPROVEMENTS IN
THE WEAVING OF "DHOOTAS" AND IN APPARATUS THEREFOR," to be as follows:
The improvements relate to the weaving of fabrics known as "dhootas," which
have a coloured or other thread drawn double into the border of the fabric for a
certain distance, in lieu of weft. And has for object the weaving of the same
with more perfect regularity in such borders than has been hitherto the case.
To accomplish this and to effect my improvements, I mount the cops, pirns, or
bobbins, carrying the border threads to be drawn into the fabric double in lieu of
weft, upon levers or other mechanism capable of giving the requisite motion
thereto, instead of having such cops, pirns, or bobbins, stationary or fixtures.
Motion is given to these levers, or analagous mechanisms by means of suitably
shaped cams or tappets in such manner that when the thread is drawn into the
shed at the border left open by the shedding motion for the purpose, the cop, pirn,
or bobbin, will be moved such a distance as will give off the exact or nearly exact
amount of yarn required to be drawn in by the weft and no more. Whereby the
length of each drawn in thread is approximately the same, and so the weaving of
the border is uniform or regular.
The warp threads at the borders are shedded to cross at every other pick as
against the central portion of the warps crossing at every pick of the looms, and
may be wound either upon the same or separate warp beams as is well understood.
In place of levers, or other oscillating or sliding mechanisms for delivering the
correct length of yarn to the border, and to be drawn therein, a delivery roller or
rollers may be employed for the purpose, and the mechanism carrying the cop, pirn;
or bobbin, may be placed at the back of the harness, or in conjunction with any
special apparatus for raising and lowering in the sheds the threads froin such cops,
pirns, or bobbins, may be fitted on the slay or near thereto if desired. And other
variations in detail may be made without departing from the peculiar character of
the invention, which consists in the employment of an adjustable mechanism, of
lever or other form, for controlling by automatic action and measurement the
amount of yarn in lieu of weft to be drawn into the borders of the "dhootas " by
means of the weft or shuttle thread, instead of allowing such yarn to be pulled off
a cop, pirn, or bobbin, controlled by tension only.

page_text: Improvements in the Weaving of "Dhootas," and in Apparatus
therefor.
"
I, WILLIAM GADD, of 64 Barton Arcade, Manchester, Civil and Consulting
Engineer, do hereby declare the nature of my invention for "IMPROVEMENTS IN
THE WEAVING OF "DHOOTAS AND IN APPARATUS THEREFOR," and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
The improvements relate to the weaving of fabrics known as "dhootas," which
have a coloured or other thread drawn double into the border of the fabric for a
certain distance, in lieu of weft; and have for object the weaving of such like
fabrics with more perfect regularity in the borders than has been hitherto
the case.
To accomplish this and to effect my improvements, I mount at any convenient
point on each side of the loom the cops, pirns, or bobbins, a a carrying the
threads a' a¹, to be drawn into the border of the fabric double, in lieu of weft,
upon a lever bb, or other mechanism provided with suitable tension and capable of
giving motion thereto, instead of having such cops, pirns, or bobbins, stationary
or fixtures.
Motion is given to these levers, or analagous mechanisms, (oscillating or sliding)
by means of suitably shaped cams or tappets c c upon the secondary shaft c¹ c¹ or
other moving parts of the loom in such manner that when the thread a¹ a¹ is drawn
into the shed, by means of the shuttle thread, at the border left open by the
shedding motion for the purpose, the cop, pirn, or bobbin carrying such border
thread will be moved such a distance as will give off the exact or nearly exact
amount of yarn required to be drawn in by the weft, or slackened out sufficiently
to allow the amount to be readily drawn into the shed; whereby the length of
each drawn in thread is approximately the same, and so the weaving of the border
is more uniform or regular than by the ordinary means.
The warp threads & d at the borders are shedded to cross at every other pick as
against the central portion of the warps crossing at every pick of the loom, and
may be wound either upon the same or separate warp beams as is well understood.
In place of levers 6 6 or other oscillating or sliding mechanisms for delivering
the correct length of yarn to the border, or slackening the same, and to be drawn
therein, a delivery roller or rollers may be employed for the purpose, and the
mechanism carrying the cop, pirn, or bobbin, may be placed at the back of the
harness, as shewn or in conjunction with any special apparatus for raising and
lowering in the sheds, the threads from such cops, pirns, or bobbins, may be fitted
on the slay or near thereto if desired. And other variations in detail may be made
without departing from the peculiar character of the invention.
r

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed; I declare that what
I claim is :-
The employment of an adjustable mechanism of lever or other form, for
slackening, or controlling by automatic action and measurement the amount of yarn
in lieu of weft to be drawn into the borders of "dhootas" by means of the weft
or shuttle thread, instead of allowing such yarn to be pulled off a cop, pirn, or
bobbin, controlled by tension only.