IMPROVEMENTS. IN LOOMS FOR · WEAVING
Year: 1882

page_text: :
LETTERS PATENT to William Smith of the Sun Iron Works Heywood in the
County of Lancaster for an Invention of "IMPROVEMENTS. IN LOOMS FOR
· WEAVING"
.
PROVISIONAL SPECIFICATION left by the said William Smith at the Office
of the Commissioners of Patents on the 21st September 1882.
WILLIAM SMITH of the Sun Iron Works, Heywood in the County of Lancaster.
"IMPROVEMENTS IN LOOMS FOR WEAVING
"
My invention relates to looms for weaving shawls and other goods, my object:
being first, to provide an improved shedding machine by which three patterns may.
be woven in the loom. Secondly, to stop the box motion in order to weave with
one shuttle only and thirdly, to provide a plain picking motion when one shuttle
only is used.
In place of the single lag barrel usually employed I use three lag barrels each
carrying different pattern lags: these barrels have their bearings in two adjustable
levers (one at each end of the barrels), these levers may be moved by a hand lever:
pivoted on the top rail or otherwise so as to bring any one of the three barrels
opposite the jacquard springs, the barrels are geared so as to turn simultaneously.
and motion is communicated to them by a wheel fitted on a feather key on a
vertical shaft.
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I stop the box motion by placing two carrier wheels on a stud, which wheels-
may turn together or be disengaged: these wheels transmit motion from the
pinion on the crank shaft to the box motion when the wheels are connected and
when the wheels are disengaged the box motion is stopped: any one of the shuttles
may thus be used. The wheels are so fitted that when the box motion is again put'
in gear it starts at exactly the same place where it left off, to secure continuity of
the pattern.
Instead of changing the chain when the plain picking motion is required I
lengthen the stud on the tappet chain lever which lifts the picking shaft so that
the bowl may be moved laterally in order to bear on a cam which I connect to the
chain wheel which cam gives the plain picking motion.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Smith in the Great Seal Patent Office on the 21st March
1883.
WILLIAM SMITH of the Sun Iron Works, Heywood in the County of Lancaster.
"IMPROVEMENTS IN LOOMS FOR WEAVING
"
My invention relates to looms for weaving shawls and other goods, my object
being, first, to provide an improved shedding machine by which three patterns
may be woven in the loom; secondly, to stop the box motion in order to weave
with one shuttle only and thirdly, to provide a plain picking motion when one
shuttle only is used.
In place of the single lag barrel usually employed I use three lag barrels each
carrying different pattern lags: these barrels have their bearings in two adjustable
levers (one at each end of the barrels) these levers may be moved by a hand lever
pivoted on the top rail or otherwise, so as to bring any one of the three barrels
opposite the jacquard springs; the barrels are geared so as to turn simultaneously
and motion is communicated to them by a wheel fitted on a feather key on a
vertical shaft.
I stop the box motion by placing two carrier wheels on a stud which wheels
may turn together or be disengaged: these wheels transmit motion from the pinion
on the crank shaft to the box motion when the wheels are connected and when the
wheels are disengaged the box motion is stopped: any one of the shuttles may
thus be used. The wheels are so fitted that when the box motion is again put in
gear it starts at exactly the same place where it left off to secure continuity of the
pattern.
Instead of changing the chain when the plain picking motion is required I
lengthen the stud on the tappet chain lever which lifts the picking shaft so that
the bowl may be moved laterally in order to bear on a cam which I connect to the
chain wheel which cam gives the plain picking motion.
And in order that my Invention may be fully understood and readily carried
into effect I will describe the accompanying Sheet of Drawings reference being had
to the figures and letters marked thereon.
Figs. 1 and 2 are elevations of my improved jacquard machine with three lag
barrels. Fig. 3 is a detached view of my improved mechanism for stopping the
drop box motion and Fig. 4 is a detached view of my improved plain picking
motion when only one out of several shuttles is used.
The jacquard machine is fitted on or near the centre of the loom to the top rail a
and in place of using one lag barrel I employ three lag barrels b b b which are free
to revolve in bearings in adjustable levers c, one on each side of the machine: an
elbow lever d pivoted to a bracket on the top rail a is connected by a rod a¹ to a
lever e at the top of the machine: the lever e is connected by an arm e¹ to the
adjustable levers c in such manner that either of the three lag barrels b may be
moved into or out of work by moving the handle of the lever d into the required
notch in the, quadrant d²: ff are the springs which act upon the needles g: h h are
double, hooks and i the lifter or back grife to which the rack is fixed: a spur
pinion j mounted on the stud j. secured to the frame, gears into the rack and
moves the pegs on the lag barrel out of contact with the springs, when the change
takes place, by means of the hollow cam k secured to the face of the pinion j which
gives a reciprocating motion to the bent lever by which the adjustable levers c are
carried: the bent lever is pivoted on a stud secured to the frame and it has a
bowl at one end upon which the hollow cam k acts. The operation is as
follows: An oscillating motion is given to the bottom levert from a cain on the
loom crank shaft (not shown on the drawing) the lever t is connected to the back

page_text: and front grifes and by rods t¹t respectively, see Fig. 2. The lifter or
back grife in ascending carries with it all the double hooks which are pressed
forward by the pegs in the lags. The lag barrels b are driven by a peg wheel m
fitted on to a feather or sliding key in the shaft m¹ which shaft receives motion
from any convenient part of the loom and imparts its motion to a star wheel b'
keyed to one of the lag barrels.
The three lag barrels are geared together by the spur pinions as shown in
Fig. 2 the vibrating motion given to the bent lever by the cam k moves the
levers c and thus presses the pegs on the lag barrel against the springs f which
move the needles g and double hooks h into position for the lifter or back grife i
to raise the double hooks h and the jacks h¹ to which the hooks are connected.
From this description it will be seen that the back grife i raises the jacks to
lower the healds and the front grife 2 lowers the jacks to raise the healds.
For weaving shawls or other fabrics where more than one pattern is required I
am able to change from one pattern to either of the others without altering the
lags on the barrels.
The second part of my Invention consists in an improved means which enables
me to work with one shuttle out of any number of shuttles.
To accomplish this object I employ two carrier wheels n n' running loose on a
stud n² fixed to the frame of the loom: the front wheel n gears into and is driven
by a pinion na on the crank shaft: the wheel n has a projection cast upon it which
fits into an aperture formed in a similar wheel also loose and on the same stud:
The wheel n gears into a wheel n' on which is a peg which drives the star
wheel n: a hand lever o pivoted to a bracket on the loon frame has a projection
or pin which enters a groove in the boss of the wheel n and in order to stop the
box motion the hand lever o is moved to disengage the wheel n from the wheel n¹:
when the box motion is thus stopped any required shuttle may be brought
into use.
The wheels are so fitted that when the box motion is again put in gear it starts
at exactly the same place where it left off to secure continuity of the pattern-see
Fig. 3.
For the picking motion where several shuttles are used I employ a chain to lift
the picking shaft clear of the striker on the fly wheel in the usual manner-my
improvement enables me to dispense with the use of the chain when only one
shuttle is required and I employ a cam p which I fix on the same star wheel
that
carries the chain barrel and I slide the chain pulley r on its stud r¹ and bring it on
to the camp which lifts the picking shaft alternately.
Having stated the nature of my Invention and described the manner of
performing the same.
I declare that I claim.
1. The use of three or more lag barrels in a jacquard machine for the purposes
herein shown and described. .
2. Stopping the drop box motion of looms when the boxes are moved by a
tappet chain when only one shuttle is required.
3. The use of a cam to give alternate picking when one shuttle is used the
tappet chain being allowed to run idle.
In witness whereof I the said William Smith have hereunto set my hand
and seal this twentieth day of March One thousand eight hundred and
eighty three
WILLIAM SMITH (L.S.)