IMPROVEMENTS IN THE PROCESS OF WEAVING COACH
Year: 1877

page_text: LETTERS PATENT to Robert Stone, of Derby, in the County of Derby, Weaver,
for the Invention of "IMPROVEMENTS IN THE PROCESS OF WEAVING COACH
Sealed the 5th February 1878, and dated the 16th November 1877.
PROVISIONAL SPECIFICATION left by the said Robert Stone at the Office
of the Commissioners of Patents on the 16th November 1877.
ROBERT STONE, of Derby, in the County of Derby, Weaver. "IMPROVEMENTS
IN THE PROCESS OF WEAVING COACH LACE,"
In the ordinary carriage lace looms as they are now worked there is but one shed
formed at each revolution of the crank shaft, and but one shuttle (whether it is a
single or double shuttle loom) goes through that shed at same time, and it requires
the suspension of the weaving action while the tag or terry wire is being inserted
into the shed specially formed to receive it. The consequence of this mode of
operating is a comparatively slow action of the loom.
Now the object of my Invention is materially to increase the rate of production
without increasing the driving speed of the loom. To this end I so arrange the
action of the heddles as to form three sheds instead of one, and I pass my shuttles
through the shed or sheds double, and put the tag in at the same time that I pass
one or two shuttles through the shed or sheds. By thus timing the action of the
working parts of the loom I am enabled to produce the same quantity of work in
three revolutions of the crank shaft as is now made by five revolutions of that shaft
in the ordinary lace loom. Thus I save forty out of every hundred revolutions,
and make more work in the same given time without increasing the driving speed
of the loom.
I may remark that the peculiarity of my process of weaving consists in forming

page_text: three sheds, simultaneously passing the tag or terry wire into the top shed at the
same time that the shuttle or shuttles pass through the lower sheds, then passing
two shuttles through two sheds at the same time, and working these separately
until they are required to pass through the shed or sheds both together again.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Stone in the Great Seal Patent Office on the 16th May
1878.
ROBERT STONE, of Derby, in the County of Derby, Weaver, "IMPROVEMENTS
IN THE PROCESS OF WEAVING COACH LACE."
In the ordinary coach or carriage lace looms as they are now worked there is but
one shed formed at each revolution of the crank shaft, and but one shuttle (whether
it is a single or double shuttle loom) goes through that shed at the same time, and
it requires the suspension of the weaving action while the tag or terry wire is being
inserted into the shed specially formed to receive it. The consequence of this mode
of operating is a comparatively slow action of the loom.
Now the object of my Invention is materially to increase the rate of production
without increasing the driving speed of the loom. To this end in the production of
a piece of ordinary coach lace, such as that illustrated in the accompanying Drawing,
in enlarged longitudinal section at Fig. 1, and in plan view at Fig. 2, I so arrange
the action of the heddles as to form three sheds instead of one, and I pass my
shuttles through the shed or sheds double, and put the tag in at the same time, and
I pass one or two shuttles through the shed or sheds. By thus timing the action
of the working parts of the loom I am enabled to produce the same quantity of
work in three revolutions of the crank shaft as is now made by five revolutions of
that shaft in the ordinary. lace loom.
Fig. 3 shews the mode of arranging the warps in the reed. One dent it will be
seen contains four ends worsted in two leashes, three ends silk, one or more ends of
linen choke or stuffing yarn, one linen tight ground, and two ends cotton slack
ground in one leash.
In order that my Invention may be fully understood it should be explained that
the peculiarity of my process of weaving consists in forming three sheds simul-
taneously, passing the tag or terry wire into the top shed at the same time that the
shuttle or shuttles pass through the lower sheds, then passing two shuttles through
two sheds at the same time, and working these separately until they are required
to pass through the shed or sheds both together again.
Figures 4, 5, and 6 illustrate the order of succession of the sheds and picks. At
Fig. 4 the shuttles are represented as making the first face pick and the first back
pick; at Fig. 5 the tag is shewn as having entered the top shed, and a shuttle is
making the second face pick; at Fig. 6 the shed is open to receive the second
back pick, after which the same order is repeated as that illustrated by the
Figures..

page_text: By this mode of working it will be understood that I save forty out of every
hundred revolutions of the crank shaft, and make more work in the same given
time without increasing the driving speed of the loom.
Having now set forth the nature of my Invention of "Improvements in the
Process of Weaving Coach Lace," and explained the manner of carrying the same
into effect, I wish it to be understood that under the above in part recited Letters
Patent I claim, the improved process of weaving coach lace, as herein described,
whereby without increasing the driving speed of the loom its rate of production is
materially enhanced.
In witness whereof, I, the said Robert Stone, have hereunto set my hand
and seal, this Fifteenth day of May, in the year of our Lord One thousand
eight hundred and seventy-eight.
ROBERT STONE. (L.S.)