IMPROVEMENTS IN DOUBLE RIBBED WARP LOOMS
Year: 1883

page_text: LETTERS PATENT to John Dove Harris of the firm of Richard Harris and Sons
of Leicester in the County of Leicester, Hosiery Manufacturers and Arthur
Shuttlewood of the same town for an Invention of IMPROVEMENTS IN
DOUBLE RIBBED WARP LOOMS
"
"
PROVISIONAL SPECIFICATION left by the said John Dove Harris and
Arthur Shuttlewood at the Office of the Commissioners of Patents on the
29th March 1883.
JOHN DOVE HARRIS, of the firm of Richard Harris and Sons, of Leicester in
the county of Leicester, Hosiery Manufacturers, and ARTHUR SHUTTLEWOOD of
the same town, "IMPROVEMENTS IN DOUBLE RIBBED WARP LOOMS,"
Our improved loom, consists of the following parts:-Two end standards,
connected together by front and back rails, and a top tie bar, the standards and
tie bar carry bearings for the axis of a guide bar bracket carrying the number of
guide bars required, each provided with the necessary number of guides, each bar
being traversed by a lever and pattern.cam, or by jacquard apparatus, and rocked
by a cam and lever.
a
There are two thin plates the length of the loom, between the standards, the
plates being supported by bars resting on brackets projecting from the standards.
At the front of the two thin bars is a needle bar carrying needles, which has
vertical movements given it by rocking levers and cams, and at the back of the
thin bars we employ one or more other needle bars, each of which have vertical
and traversing movements, and when required rocking movements communicated
to it by levers and pattern cams, or the traverse of each bar, may be effected by
jacquard apparatus, the axis of the pattern wheels is provided with a toothed
wheel operated by a traversing cam, or a cam shaft. Instead of employing at the
front a needle bar having vertical movements only we sometimes substitute, one
or more needle bars operated in the same way as the needle bars at the back of
the two thin bars before mentioned.
In addition to the needle bars above described we employ bars provided with
points, said bars have vertical rocking and traversing movements communicated to
them by levers and pattern cams, or the traverse may be effected by jacquard
apparatus, these point bars we employ for producing fabrics with a plush surface.
By means of a warp loom constructed as above described we are enabled to produce
a greater variety of new patterned fabrics than heretofore.

page_text: There are two thin plates D, the length of the loom, between the standards, each
plate being supported by a bar D', the ends of which rest on brackets projecting
from the standards.
At the front and also at the back of the thin plates is a needle bar E to each of
which leads carrying needles are secured, each needle bar E is an angle bar, each
provided on its lower side with two rods E', which slide vertically in two
brackets D' secured to the bar D'. The needle bar at the front of the machine
bas the requisite vertical movements given it by two cams, one of which is shewn
in side view at Figure 4, each of which operates a truck bearing lever F which
rocks on an axle secured on the end standard, the back end of the lever carries
an axle which receives the lower end of a connecting link, the upper end of which
is carried by an axle pin adjustable in a slotted bracket F' secured to the underside
of the needle bar E.
The needle bar at the back of the inachine is moved in like manner by two cams
one of which is shewn in side view at Figure 5, each operating a truck bearing
lever G the back end of which is provided with a connecting link, the upper end of
which is carried by an axle pin adjustable in a slotted bracket secured to the
underside of the back needle bar E.
Besides the vertical movements of the two needle bars E, we communicate
traversing movements to one or both of them, in the latter case we employ the
arrangement of parts shewn in section at Figure 3. Instead of screwing the
needle leads direct onto the angular needle bars E we screw them onto one side of
two needle bars E2, the opposite side of each bar, being shaped so as to be
retained in position by a verge formed, on the upper outer edge of the angular
bar E, the bottom outer edge of the needle bar is planed its whole length to the
shape shewn, so as to be retained by, and slide upon three or more plates E³, the
number varying according to the length of the loom, each needle bar is held up to
a stop near the left end of the loom by a spring E the left end of which is hooked
on a stud in the angular bar E, the right end of the spring being hooked on a
stud E' secured in the needle bar E', the outer end of this stud receives one end of
a rod E, shown only at Figure, 1, the opposite end of which is attached to one of
the boxes of a spring dropper jacquard by which means the traverse of the needle
bar to the right is effected, or the traverse of the needle bars may be effected by
rocking levers operated by pattern cams in the usual way.
In addition to either or both of the traversing needle bars E², we employ
a needle bar H, which has traversing movements and rocking movements
communicated to it, each needle bar is held up to a stop near the left
end of the loom by a spring attached to the bar H, and the angular bar E as
before described, the right end of the needle bar has one end of a rod attached
to it, the opposite end of the rod being attached to one of the boxes of a
spring dropper jacquard, by which a traverse to the right is effected. The bar H
is an angular bar and is provided with several pairs of studs H¹ on its under_side,
each pair carries a rod which slides in a bracket H2, secured to the angle bar E the
front of the bar H is provided with three or more arms H³ slotted at their lower
end which slides upon a rod H adjustable in the slot of a bracket secured on the
lower side of the angle bar E such arrangement ensures the vertical portion of the
needles carried by the bar H ranging in the same line, as the needles carried by the
bar E2; while they are being traversed, and when being supplied with thread by
the guides. The needles in the leads carried by the bar H being cranked as shewn
lie in a space made for them by taking away say one lead of needles carried by the
bar E or E2; if there are two needles in each lead carried by the bar H, such bar
can only be traversed for a space of three needles between the next adjacent leads.
of needles, on each side on the needle bar E or E' such traversing will be made for
the space of either one, two, or three needles at one traverse, according to the
pattern punched on the cards. When the needle bar H is required to be rocked
say for the purpose of removing the needles it carries from between the two leads
of needles on the needle bar E so as to traverse them to the space between the

page_text: next leads, we take away the whole of the arms H³ and attach a cam bracket I to
the needle bar E2, and to the needle bar H an arm H5, which carries an adjustable
set screw and-lock nut, the screw as it slides over the cam inside the bracket I tips
the needle bar H into the position shown in section at Figure 6 causing the
cranked needles to pass clear of the vertical needles, carried by the bar E2 as the
bars are traversed in opposite directions. The cam bracket is shewn in plan at
Figure 64. In addition to the needle bars above described, we employ bars
provided with points instead of needles, such bars have rocking and traversing
movements communicated to them in the same manner, as the needle bar H above
described, a front view of one such lead of points J is shewn at Figure 7, these
points we employ for producing fabrics with a plush surface, the loops of thread
formed on them by the rocking and traversing of the guide bars slide off the points,
as the point bar is lowered. By means of a double ribbed warp loom constructed
and operating as above described we are enabled to produce a greater variety of
new patterned fabrics than heretofore.
Having thus described, the nature of our said invention and the manner of
performing the same, we declare that we claim, for the additional rocking and
traversing needle bars, substantially as herein before described with reference to the
accompanying drawings.
In Witness whereof, we the said John Dove Harris and Arthur Shuttlewood,
have hereunto set our hands and seals this twenty eighth day of September in the
year of Our Lord one thousand eight hundred and eighty three.