MENTS IN CARPET LOOMS "
Year: 1883

page_text: LETTERS PATENT to George William Grosvenor and James Bedford of
Kidderminster in the County of Worcester for an Invention of "IMPROVE
MENTS IN CARPET LOOMS
"
PROVISIONAL SPECIFICATION left by the said George William Grosvenor
and James Bedford at the Office of the Commissioners of Patents on the
6th January 1883.
GEORGE WILLIAM GROSVENOR and JAMES BEDFORD of Kidderminster in the
County of Worcester "IMPROVEMENTS IN CARPET LOOMS
נו
This Invention has for its object to produce new arrangements and combinations
of materials in carpet fabrics.
Extra gear shafts are provided, which are worked by cams or other means, so
timed as to cause alternate warp threads, or alternate series of warp threads, (which
are drawn through the said gear shafts) to remain below alternate back weft
threads or series of back weft threads.
The said warp threads are "stuffing" threads and by their lying below alternate
back weft threads are intended to protect the weft from contact with the floor and
so render the carpet more durable.
The stuffing threads work entirely below the other warp threads, and conse-
quently may be thicker than when they are mixed with other warp threads in the
body of the fabric.
A better " bind " on the surface is also obtained which is especially advantageous
in cut pile fabrics.
The principle is applicable to Jacquard, Tapestry and other carpet looms.

page_text: These bealds are caused to remain down in turn for receiving alternate back
wefts over the stuffing threads or in other words they will be caused to rise in
turn for every other pick on the back and remain down the remainder of the picks
which completes the round of changes gone through by the loom including the
alternate pick on the back.
For producing this effect the cams are made to be up one pick and down five
picks. One of the cams is represented by Figure 4 one sixth the actual size.
These cams may be worked on the treadle box of the loom one for each heald
timing them at opposite points with respect to each other. The shafts or healds,
levers and connections resemble those employed for the binding warps. The cams
shown are suitable for the loom known as "Crossleys three shot loom." The
routine of weaving is in other respects as usual but it will be seen that the stuffing
warp threads will by this invention be worked so entirely below all other warp
threads as to form a close covering for the back of the fabric and back wefts
protecting these latter from wear and so rendering the carpet more durable. The
pressure of the stuffing threads upon the back wefts when the stuffing threads are
worked in the manner described, will cause the fabric to be better bound and
braced together. We prefer to apply our invention to three shot looms but it may
also be applied to the two shot looms. Figure 5 is a diagrammatical view of a two
shot fabric woven in accordance with our invention. The figure is lettered in
accordance with the description given of Figure 1. Figure 6 shows one of the pair
of cams suitable for working the stuffing warp in a Crossley two shot loom."
This cam raises the gear shaft with which it is connected for one pick and allows
it to remain down for three picks. No alteration is made either in the arrange-
ments for actuating the figure warp, or the binder warp or the shuttle which lays
in the weft. In general the parts of the loom to which no special reference has
been made may remain unchanged.
"
Having thus described the nature of our said Invention and the manner of
performing the same we would have it understood that we claim our improvements
by which the stuffing warp threads are kept separate from the figure warp threads
in the body of the fabric and are made to interweave with the back picks of weft
substantially as described.
In witness whereof we the said George William Grosvenor and James
Bedford have hereunto set our hands and seals this fifth day of July in
the year of our Lord One thousand eight hundred and eighty three.