IMPROVEMENTS IN MACHINERY FOR SHEDDING POWER LOOM WARPS
Year: 1870

page_text: LETTERS PATENT to John Morris, of Belfast, in the County of
Antrim, Ireland, for the Invention of "IMPROVEMENTS IN MACHINERY
FOR SHEDDING POWER LOOM WARPS."
Sealed the 22nd November 1870, and dated the 7th June 1870.
PROVISIONAL SPECIFICATION left by the said John Morris at the
Office of the Commissioners of Patents, with his Petition, on the
7th June 1870.
I, JOHN MORRIS, of Belfast, in the County of Antrim, Ireland, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINERY FOR SHEDDING POWER LOOM WARPS," to be as follows:-
The chief object of my Invention is when applied to single action
jacquard machines to obtain a long dwell for the jacquard hooks while
they are raised; thereby giving the shuttle more time to get across the
web without dragging on the yarn at the selvages and avoiding the .
necessity of making the loom pick very hard.

page_text: The machinery or motion hitherto used has been a simple crank
motion fixed on the end of the crank shaft of the loom, and to this
crank the rod for raising the lifting bars and hooks of the jacquard has
been connected.
Now my Invention consists in the employment of an oval excentric
toothed wheel keyed or otherwise secured on the end of the crank shaft.
This wheel being oval communicates a varying circular motion to
another toothed wheel, which runs on a stud and is likewise oval
and excentric. Another stud screwed into this second wheel carries
the connecting rod which works the jacquard. This second stud is so
placed in its wheel that the time of slowest motion of the wheel shall
be while the said stud is passing under the first named stud, and the
time of quickest motion of the wheel while the said stud is passing
over the first named stud; thus allowing a long dwell while the said
stud and the connecting rod are down and the jacquard hooks up, and
a short dwell while the stud is up and the hooks down.
In applying this motion to a double action jacquard or to the working
of two heddles for plain goods, a pinion is firmly fixed to the second
oval excentric wheel, and gears with a wheel having twice as many
teeth as the pinion, whereby three dwells are obtained in this wheel.
The two connecting rods for the double action jacquard or heddles are
worked off the shaft of the last-named wheel with the ordinary double
crank motion.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Morris in the Great Seal Patent Office on 2
the 7th December 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MORRIS, of Belfast, in the County of Antrim, Ireland, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of June, in the year 3
of our Lord One thousand eight hundred and seventy, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said John Morris, Her special licence

page_text: that I, the said John Morris, my executors, administrators, and assigns,
or such others as I, the said John Morris, my executors, adminis-
trators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN MACHINERY
FOR SHEDDING POWER LOOM WARPS," upon the condition (amongst others)
that I, the said John Morris, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said John Morris, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement thereof, reference being had to the accom-
panying Drawings, that is to say :—
The chief object of my Invention is when applied to single action
jacquard machines to obtain a long dwell for the jacquard hooks while
they are raised, thereby giving the shuttle more time to get across the
web without dragging on the yarn at the selvages and avoiding the
necessity of making the loom pick very hard.
The machinery or motion hitherto used has been a simple crank
motion fixed on the end of the crank shaft of the loom, and to this
crank the rod for raising the lifting bars and hooks of the jacquard has
been connected.
Now my Invention consists in the employment of an oval excentric
toothed wheel keyed or otherwise secured on the end of the crank shaft..
This wheel being oval communicates a varying circular motion to.
another toothed wheel which runs loose on a stud and is likewise oval.
and excentric. Another stud screwed into this second wheel carries
the connecting rod which works the jacquard. This second stud is so
placed in its wheel that the time of slowest motion of the wheel shall
be while the said stud is passing under the first-named stud, and the

page_text: time of quickest motion of the wheel while the said stud is passing over
the first-named stud, thus allowing a long dwell while the said stud
and the connecting rod are down and the jacquard hooks up and a short
dwell while the stud is up and the hooks down.
Figures 1 and 2 of the annexed Drawings represent a loom with my
Invention applied thereto.
N is the loom and J is the jacquard appa-
ratus on the top of the same; A is the crank shaft on which is keyed
an oval excentric toothed wheel B, which gears with and communicates
a varying circular motion to another oval and excentric wheel C. This
wheel runs loose on a stud D, and has screwed into it another stud E
to which the connecting rod F is attached. The rod F works the
jacquard apparatus through the intermediation of a lever L, and, así
before explained, the position of the stud E is such that the time of
slowest motion of the wheel C is while the stud is passing under the
stud D, and the time of quickest motion of the wheel C while the stud E 1
is passing over the stud D, so that a long dwell is obtained while the
jacquard hooks are up and a short dwell while they are down.
Figure 3 represents a modified arrangement in which a pinion H is fixed
to the second oval wheel C and gears with a wheel K, having twice as
many teeth as the pinion. The toothed wheel K. has fixed to it a crank O 2
(seen more clearly in the detached sectional view Figure 4) which works
a rod P connected to a toothed rack R, which gears with a toothed
wheel S. The wheel S is keyed on a shaft T running in bearings and
reaching across the loom. The heddles V, V¹, are connected by straps
to pulleys W on the shaft T, so that when the shaft T turns backwards 2
and forwards, the heddles will rise and fall alternately, and the arrange-
ment is such that the time of slowest motion of the wheel K is while
the stud O is passing a line joining the centre of the stud M and the
rack R, thus getting a dwell while the heddles are apart and allowing
time for the shuttle to pass through the shed.
In applying this motion for working double action jacquards, I attach
a double crank motion to the wheel K, as shown in Figure 5, the rods
Y, Y, being connected to two levers the same as the lever L, in
Figure 2, which levers raise the two sets of hooks in the jacquards
alternately.
<
And having now described the nature of my said Invention, and in
what manner the same is to be performed, I declare that I claim as my
Improvements in Machinery for Shedding Power Loom Warps," the
3
3

page_text: employment of oval wheels arranged so as to act substantially in the
manner and for the purpose herein-before described and shown in the
accompanying Drawings.
In witness whereof, I, the said John Morris, have hereunto set my
hand and seal, this Fifth day of December One thousand eight
hundred and seventy.
JOHN MORRIS. (L.s.)