A Device for Indicating the Length of Fabric Woven by any Given Number of Weft Threads in Looms.
Year: 1891

page_text: Date of Application, 18th Apr., 1891
Complete Specification Left, 16th Jan., 1892-Accepted, 16th Apr., 1892
PROVISIONAL SPECIFICATION.
A Device for Indicating the Length of Fabric Woven by any Given
Number of Weft Threads in Looms.
I, RICHARD DOUGLAS, of Storths, Moldgreen, Huddersfield in the County of
York, Book-keeper, do hereby declare the nature of this invention to be as
follows:-
My invention relates to looms for weaving and consists in a device for inlicating
the length of fabric woven by any given number of weft threads and thus enabling
the weaver or other person to readily ascertain whether the said fabric is being
woven of the desired weight or if "too heavy" or "too light."
According to my invention I provide means whereby one of the warp threads.
which is preferably situated in one of the selvages of the fabric, is operated
independently of the healds and is raised and lowered periodically after weaving a
given number of picks. This operation leaves a visible mark on the fabric at each
place where the said warp thread changes its position and thus the weaver or other
person is enabled to readily ascertain, by measuring the distance between two
of the said marks the length of fabric woven by the number of threads known
to have been inserted in the fabric between the two said marks and consequently
whether the fabric is being woven "too heavy" or 66 too light," or of the desired
weight.
According to one mode of carrying my invention into practice I mount on the
shaft of the single reverse and chain shaft pinions, or on that of the double reverse
pinion, or on the shaft of the change cylinder wheel, which is lengthened for the
purpose, a worm and I gear with the said worin a worm wheel which is mounted
on an axle carried by bearings in an adjustable bracket attached to any suitable
or convenient part of the loom frame. The said bracket is made adjustable to permit
worm wheels of any desired size to be attached to the said axle to gear with the
said worm. On the said axle is also mounted a cam which operates a bell crank
lever pivoted on an adjustable slide attached to the loom frame. The end of this
bell crank lever is connected with the aforesaid warp thread not operated by the
ordinary healds and the said thread is raised or lowered by the oscillation of the
bell crank lever about its pivot. If desired I may operate more than one warp
thread by the bell crank lever and these said threads may be situated in one or both
selvages.
:-
The operation of my device is as follows Each of the aforesaid shafts to
which I may attach the worm and consequently the said worm revolves once for
each pick taken and therefore the worm wheel with which the worm gears is
rotated the space of one tooth at each pick and the cam which is mounted on the
same spindle consequently also advances a corresponding fraction of its revolution.
Upon reaching a certain position in its revolution the said cam oscillates the bell
crank lever about its pivot and raises or lowers the warp thread or threads con-
nected therewith. The movement of the said warp thread is thus controlled by the
picking motion of the loom and the change of position of the said warp thread can
only take place when a certain given number of picks have been taken at which
time however the change is positive. The number of picks made between each
change is equal to the number of teeth in the worm wheel.
I prefer to employ a worm wheel containing a number of teeth corresponding
with the number of weft threads it is desired to insert in a length of one inch or a
convenient fraction or multiple of an inch of fabric. The said worm wheel may be
removed and another sub-tituted therefor as desired when changing the number of
picks required in the inch.

page_text: My device is positive in its action and when it is necessary to
« weave back "
the worm wheel and cam automatically resume the positions in their revolution
occupied by them when weaving that part of the fabric which it is necessary to
re-weave and the indication therefore remains accurate without rendering it
necessary on such occasions to adjust the positions of the said worm wheel
and cam.
Dated this 18th day of Å uril 1901
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
A Device for Indicating the Length of Fabric Woven by any Given
Number of Weft Threads in Looms.
I, RICHARD DOUGLAS, of Storths, Moldgreen, Huddersfield in the County of
York, Book-keeper, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
My invention relates to looms for weaving, and consists in a device for indicating
the length of fabric woven by any given number of weft threads, and thus enabling
the weaver or other person to readily ascertain, whether the said fabric is being
woven of the desired weight, or if "too heavy," or "Loo light."
According to my invention I provide means whereby one of the warp threads
which is preferably situated in one of the selvages of the fabric, is operated inde-
pendently of the healds, and is raised and lowered periodically after weaving a
given number of picks. This operation leaves a visible mark on the fabric, at
each place where the said warp thread changes its position, and thus the weaver or
other person is enabled to readily ascertain (by measuring the distance between
two of the said marks.) the length of fabric woven by the number of threads known
to have been inserted in the fabric, between the two said marks, and consequently
whether the fabric is being woven too heavy or "too light" or of the desired
weight.
"
DESCRIPTION OF DRAWINGS.
Fig. 1 is a side elevation of my invention.
Fig. 2 is a front view of Fig. 1.
Fig. 3 shows a plan of cam and loose plate.
According to one mode of carrying my invention into practice, I mount upon the
shaft of the chain or lag cylinder wheel or upon the top jacquard cylinder which is
lengthened for the purpose, a worm A, with pinion B, attached thereto, and I gear
with the said worm a worm wheel C, which is mounted on an axle D, carried in an
adjustable bracket E, attached to any suitable or convenient part of the loom
frame. The said bracket E, is made adjustable to permit the worm wheels (', to
be of any desired size, and attached to the said axle to gear with the said worm;
on the said axle or upon the side of the worm wheel is mounted a fixed eam F,
and loose plate (, which operates a bell crank lever II, pivotted upon a
bracket H', which bracket is adjustable on the bracket E, attached to the loom
frame the bell crank lever I preferably carries a runner J, which bears upon the
cam F and plate (.
The other end K of this bell crank lever, is connected with the aforesaid special
warp thread K, (not operated by the ordinary healds) as the thread K is passed
through any hole or perforation K' of the lever K as desired, and the said thread
is raised or lowered by the oscillation of the bell crank lever I about its pivot,
caused by the runner upon the bell crank lever H dropping down the incline F¹
upon the loose plate G and cam F, and causing the lever K, to lower the warp
thread so marking the fabric at the given number of picks. If desired I may

page_text: operate more than one warp thread by the bell crank lever H, and these said
threads may be situated in one or both selvages.
The operation of my device is as follows:-
Upon ench of the aforesaid shafts I may attach or gear the pinion B and
worin A, to be so speeded so that the said worm A may revolve once for each pick
taken, and therefore the worm wheel C, with which the worm gears is rotated the
space of one tooth at each pick, and the cam which is mounted on the same spindle,
consequently also advances a corresponding fraction of its revolution. Upon
reaching a certain position in its revolution, the said cam oscillates the bell
crank lever about its pivot, and raises or lowers the warp thread connected
therewith.
The movement of the said warp thread is thus controlled by the picking motion
of the loom, and the change of position of the said warp thread can only take place
when a certain given number of picks have been taken, at which time however the
change is positive. The number of picks made between each change is equal to the
number of teeth in the worm wheel.
I prefer that the worm wheel C contains a number of teeth corresponding with
the number of weft threads it is desired to insert in a length of one inch or a
convenient fraction or multiple of an inch of fabric.
The said worm wheel may be removed, and another substituted therefor as
desired when changing the number of picks required in the inch.
The loose plate G is adjustable as to its position upon the worm wheel and can
be set as desired see dotted lines at Fig. 3 to register from two to any number of
picks per inch as required, the lever II, (having its upper part K through which
the extra warp thread passes) being moved so as to raise or lower the thread at
longer or shorter intervals as desired.
At the other end of the worm wheel shaft D, is a worm L, gearing with a small
worm wheel M; the worm wheel M is upon a shaft or axle N, upon which is
another worm P, gearing with a larger worm wheel R, upon a stud S, carried by
suitable bracket T, the face of the worm wheel R, forms an indicator to indicate
the number of yards, the worm wheel M indicating the inches.
to "
My device is positive in its action and when it is necessary
weave back "
the worm wheel and cam automatically resume the positions in their revolution,
occupied by them when weaving that part of the fabric which it is necessary to
re-weave, and the indication therefor remains accurate without rendering it
necessary on such occasions to adjust the positions of the said worm wheel, and
loose cam or plate.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. Indicating or marking upon the fabric by means of the warp thread Kat
each given number of picks, so that the length woven can be readily ascertained,
also whether the number of picks per inch or given distance are correct, substantially
as shown and described.
2. The combination of the worm A, pinion B, worm wheel C. axle D, fixed
cam F, loose plate G, bracket E, and bell crank lever H, as and for the purposes
shown and described.
3. The combination of the worm A, pinion B, worm wheel C, axle D, fixed
cain F, loose plate G, bracket E, bell crank lever H, worm L, worm wheel M,
worm P, and worm wheel R with indicator, as and for the purposes substantially as
shown as described.
Dated this Fifteenth day of January 1892.
JOHN E. WALSH,
Crossley Street, Halifax, Agent for the Applicant.