IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS USED FOR FANCY WEAVING.
Year: 1876

page_text: LETTERS PATENT to Lewis Haslam and Cornelius Marshall, both of Bolton;
I
in the County of Lancaster, for the Invention of "IMPROVEMENTS IN THE
CONSTRUCTION OF LOOMS USED FOR FANCY WEAVING.".
Scaled the 28th October 1876, and dated the 3rd May 1876.
PROVISIONAL SPECIFICATION left by the said Lewis Haslam and Cornelius
Marshall at the Office of the Commissioners of Patents on the 3rd May
1876.
LEWIS HASLAM and CORNELIUS MARSHALL, both of Bolton, in, the County of
Lancaster. "IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS USED FOR FANCY
WEAVING."
This Invention relates to that of the fancy loom called the "double lift dobbie"
or "index machine" employed for working the healds, so as to produce the pattern,
and is equally applicable to those worked with a single cylinder or with two
cylinders.
In order to make a narrow gauge dobbie, we mount the "jacks" in two rows,
one above and ono below alternately, and thus the strength of the "jacks" may be
increased, and the machine is enabled to work with either a light or heavy
warp.
The bottom jacks are connected to the top jacks by means of parallel lovers and
links, so that they counterbalance each other in whatever position the healds may
be, and therefore the tension of the healds is slight, and the amount of tension can
be regulated at will. The two shafts of the healds are connected together by
wires.
The knives are worked by well-balanced levers, the back levers being slightly
longer than the front ones, so as to form a perfect V formed shed. The levers
have a cranked or bent form at one part, so as to allow them to pass each.
other, and they are worked by a double crank on the tappet shaft of the
loom.
The needles of the dobbie are acted upon by chains, lags, or cards, as desired..
The mounting of the cylinder is so arranged that it can (at will) be fixed in one
position for working with chains or lags, or be mado movable in slots for working
with cards in the ordinary manner.
. In some cases we dispense with the top jacks altogether, and attach the heald:

page_text: cords direct to the hooks by means of wires, so arranged that either hook can raise
the heald without acting upon the other hook.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Lewis Haslam and Cornelius Marshall in the Great Seal Patent
Office on the 3rd November 1876.
LEWIS HASLAM and CORNELIUS MARSHALL, both of Bolton, in the County of
Lancaster. "IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS USED IN FANCY
WEAVING."
This Invention relates to that part of the "fancy" loom called the "double lift
dobbie" or "index machine," which is employed for working the healds, so as to
produce the pattern, and is equally applicable to those worked with a single
cylinder or with two cylinders.
In order to make a narrow gauge dobbie, we sometimes mount the "jacks" in
two rows, one above and one below alternately, and thus the strength of the jacks
may be increased, and the machine is enabled to work with either a light or a
heavy warp.
The bottom "jacks" are connected to the top jacks by means of parallel levers and
links, so that they counterbalance each other in whatever position the healds may
be, and therefore the tension of the healds is slight, and the amount of tension
can be regulated at will. The two shafts of the healds are connected together by
wires.
The grives are worked by well-balanced levers, the back levers being slightly
longer than the front ones, so as to form a perfect V formed shed. The levers
may have a cranked or bent form at one part, so as to allow them to pass cach
other, and they are worked by a double crank on the tappet shaft of the
loom.
The needles of the dobbic are acted upon by chains, lags, or cards as desired.
The mounting of the cylinder is so arranged that it can (at will) be fixed in one
position for working with chains or lags, or be made movable in slots for working
with cards in the ordinary manner.
In sonic cases we dispense with the top jacks' altogether, and attach the heald
cords direct to the hooks by means of wires or slides, so arranged that either hook
can raise the heald without acting upon the other hook.
Such being the nature and object of our said Invention, we will now proceed to
describe in detail the manner in which the same is to be or may be performed or
carried into practical effect; and in order that the same may be clearly understood
we have annexed hereunto a Sheet of Drawings illustrative thereof, and have
marked the same with figures and letters of reference corresponding with those in
the following explanation thereof.
Fig. 1 in the annexed Drawing is a section showing the manner in which we
sometimes arrange the jacks in two rows (one above and one below alternately), so
that stronger jacks may be used without increasing the width of the dobbie, a, a,
being the jacks, and b, b, the hook wires.
Fig. 2 is a side elevation showing part of the framework of the loom, c, c, sup-
porting the dobbie or index machine d, d. In this arrangement the jacks are
dispensed with, and the double levers e, e', act directly upon and alternately lift the
grives, ff, being connected thereto by links g. g.
Fig. 3 is a front elevation of this arrangement, and Fig. 4 is a plan view of the
double levers e, c'; h, h¹, are the driving rods (joined to the levers by swivels h², h²)
which receive their motion from the double crank i, i, which is attached to the
tappet shaft of the loom by the disc k, l, (see also detached face view, Fig. 5); 1, 1.
are the pressers against which the pattern bowls or lags move. If pattern cards are'

page_text: used these pressers are not required. These push the lances m, m, which in turn
act upon the hooks n, n¹, in the usual mannor (see also detached sectional view
Fig. 6); Fig. 4 shows the method of working the double lovers c, e¹; the levers
e, e, are affixed by set screws 1 and 2 to the shaft o, o, which turns in brackets
?, p, and the lever c¹ is also placed upon the same shaft, but works loosely.
thorcon.
In Figs. 2, 3, and 6, q, q, is the lance plate, and r, r, is a grid in which the slides
8, 8, are placed at equal distances apart; t, t, is a guide for the slides.
Fig. 7 is a plan view of one of the lances m.
Fig. 8 shows another method of working, the lances, hooks, and slides being
Bomewhat differently constructed and arranged. The motions of the machine are
the same. u, u, is a stationary grifo for the purpose of retaining the slide in a raised
position when so required.
Fig. 9 is an edgo view of the slide, and Fig. 10 shows the construction of the
hook n when working with a stationary grife u with the hooks on the same level,
and with the same construction of slide, as at Fig. 6.
The healds are attached to the slides 8, 8, and raised in a perpendicular lino
from the grives f, f¹. This may be done by two methods, as shown on the
Drawings. The grives f, f', are lifted by well-balanced double levers e, c'¹, by means
of the rods h, h, and double crank i, i.
•
By the arrangement of the books, one within the other, as shown in Fig. 8,
the healds may be kept in a raised position for any number of picks of the
required.
If the same heald is required to be raised a number of times successively, then
the chain being formed so as to present as many blanks to the pressers L,, as will
allow the grives ff, to lift the hooks n, n', alternately (one grife always being up
when the other is down), it will thus bo seen that when the grife f lifts the
hook n to which the slide s is attached the hook n' will be loft resting on the
grid r, r, until its own grife f¹ raises it as the other descends, and meeting the
falling slide midway again raises it to the top. This will be repeated as often as
the heald is required to be raised, but if the grife has taken the hook n up and
the heald is required to be down the next pick, a bowl or lag being presonted to
the presser will push' the lance m, and the spring side of the hook n will give
way, and allow the lance m to push off the hook n¹, allowing the grife f¹ to rise
empty, and the descending heald to fall to the bottom with its grife f.
When working according to the method indicated at Fig. 8, we alter the con-
struction of the slide s, and place one hook within the other, the inner one ŉ being
supported and carried by the lance m by means of the turn 1 on the spring side of
the hook.
When working on the system of sustaining the healds in a raised position (thus
keeping the yarn up as often as required, as seen at Fig. 8), we place the stationary
grife u in such a position as to allow the heald to rest about half an inch from the
top of the "shed," and form a turn 2 on the spring or shorter side of the outer
hook n.
If we require the heald kept up for a number of picks in succession, so
many blanks being presented by the chain to the pressers when the grife f¹ has
lifted the outer hook n², and is descending, the turn 2 of this hook will catch on the
stationary grife u, and the heald will be kept up. The inner hook n will then rise
with its grife f, and will again lift the heald the half inch it had dropped when
caught on the grife u, the hook n' being still held by the turn 2, which will again
keep up the heald, and the inner hook n will descend empty. If the heald is .
required down after having been up a number of picks, a bowl or lag being pre-
sented to the presser at the time the grives f, f, are at the limit of their move-
ment, the spring side of the outer hook n' will be pushed back, so as to allow the
turn 2 to pass the fixed grife u, and the heald will fall with its grife to the bottom
of the "shed."
We also work on the same system (with the rest grive) with the hooks side by
side, as in Fig. 10.

page_text: Having now described the nature and object of our said Invention, together with
the manner in which the same is to be or may be perforined or carried into prac-
tical effect, we wish it to be understood that we claim, as our Invention, the
improvements in the construction of double-lift "dobbies" or "index machines," as
herein-before described and illustrated by the Drawings annexed, or any merc
modification or imitation thereof, constructed and operating in substantially the
same or a similar manner.
In witness whereof, I, the said Lewis Haslam (on behalf of myself and the
said Cornelius Marshall), have hereunto set my hand and seal, this Thirty-
first day of October, in the year of our Lord One thousand eight hundred
and seventy-six.
LEWIS HASLAM. (L.S.)