IMPROVEMENTS IN MACHINERY OR APPARATUS USED IN WEAVING
Year: 1857

page_text: LETTERS PATENT to Jonas, Craven, of Bradford, in the County of York,
Designer, for the Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS
USED IN WEAVING."
Sealed the 13th April 1858, and dated the 29th October 1857.
PROVISIONAL SPECIFICATION left by the said Jonas Craven at the
Office of the Commissioners of Patents, with his Petition, on the 29th
October 1857.
I, JONAS CRAVEN, of Bradford; in the County of York, Designer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN MACHINERY
OR APPARATUS USED IN WEAVING," to be as follows:-
The improvements relate to the jacquard, and consist in giving independent:
motion to the bottom or knot board, in order that a downward motion may be,
given thereto at the time of giving upward motion to the frame of lifting
blades to form sheds, by which the distance of traverse for the lifting motion
may be reduced and time saved to work the jacquard and loom at increased.
speeds. The ordinary lifting frame and the bottom or knot board are operated
by separate levers and cranks or other like operating means, capable of being.
shifted or timed to vary the times of operating of the parts in relation to each
other as desired. Sometimes I apply india-rubber or other suitable springs to
draw down the harness in place of weights.
Also, the improvements relate to giving independent motion from the loom

page_text: shaft to the card cylinder. This I accomplish by a chain or other endless
band passing over suitable pulleys, or by connecting rods or other suitable
means.
Also to obtaining a capability for giving motion to the cylinder in either
direction (when the loom is not in motion) by the direct action of a levera
handle operating a catch or catches capable of taking on to the pins of the
cylinder.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Jonas Craven in the Great Seal Patent Office on the 28th
April 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JONAS
CRAVEN, of Bradford, in the County of York, Designer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of October, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twenty-first year of Iler
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Jonas Craven, Her special licence, that I, the said Jonas Craven, my
executors, administrators, and assigns, or such others as I, the said Jonas
Craven, my executors, administrators, 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
OR APPARATUS USED IN WEAVING," upon the condition (amongst others) that I, the
said Jonas Craven, 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 Jonas Craven, do hereby declare the
nature of the 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, that is to say:-
The improvements relate to the jacquard, and consist in giving independent
motion to the bottom or knot board, in order that a downward motion may be

page_text: given thereto at the time of giving upward motion to the frames of lifting
blades to form sheds, by which the distance of traverse for the lifting motion
may be reduced and time saved to work the jacquard and loom at increased
speeds. The ordinary lifting frame and the bottom or knot board are operated
by separate levers and cranks or other like acting means capable of being
shifted or timed to vary the times of operating of the parts in relation to each
other as desired. Sometimes I apply india-rubber or other suitable springs to
draw down the harness in place of weights.
Also, the improvements relate to giving independent motion from the loom
shaft to the card cylinder; this I accomplish by a chain or other endless band
passing over suitable pulleys, or by connecting rods or other suitable means...
Also, to obtaining a capability for giving motion to the cylinder in either
direction (when the loom is not in motion) by the direct action of a lever
handle operating a catch or catches capable of taking on to the pins of the
cylinder.
But that the nature of these my improvements, and the means which I
adopt in carrying the same into effect may be fully understood, I will proceed
to describe the Drawing annexed.
DESCRIPTION OF THE DRAWING.
Figure 1 shows the right-hand end view; Figure 2, a front view; and
Figure 3, a left-hand end view of some of the parts of a power loom, with
jacquard apparatus applied, the parts of which are arranged according to my
improvements; Figure 4 shows the jacquard separately. a, a, is the main
framing; 6, the main or crank axis; c, the cam or tappet shaft; and d, the
jacquard apparatus. Upon the main or crank shaft 6 is affixed the double
crank b¹, 6º. The crank b', in the rotation of that shaft b, gives motion by
means of the connecting link e to the lever f, which turns upon the axis f',
whilst at fit is connected to the frame f³, supporting the bottom or knot
board f, by which, in the rotation of the crank b', an up-and-down motion
will be given to the knot board, and the amount of motion thus given may
be regulated by varying the position of the crank pin 6. The crank pin b² is
connected by the rod g to one end of the lever h, which turns upon the axis h¹,
and at its cther end is, by the link i, connected to the frame j of lifting blades
for lifting (as is well understood) the selected wires after each change. The
position of the pin 62 is capable of adjustment to vary the amount and time of
motion to the parts actuated thereby. By thus giving motion to the bottom.
or knot board simultaneously, but in an opposite direction to that given to the
frame of lifting blades, the amount of motion required to be given to such

page_text: frame of lifting blades for the opening or closing of the sheds may be reduced
to about one. half, which is of great advantage when high speeds are required.
kshows india-rubber, though other suitable springs may be applied, to draw
down the harness. Upon the cam or tappet shaft is affixed. the wheel l,
formed with teeth the better to take hold of the links of the endless chain m,
which also passes round a similar wheel'n, affixed upon the shaft or axis n¹,
upon which is affixed the pinion n², which takes into and gives motion to the
pinion n³, affixed upon the axis n', which with the axis n¹ is capable of
rotating freely in the stationary bearings o, and has affixed upon it the small
crank arm n³, which by means of the link n gives motion. to the rocking
frame n', carrying the jacquard cylinder in order to give motion thereto. P
is
the lever handle by which rotary motion may be given to the jacquard cylinder
in either direction, when the loom is not in motion. This lever handle turns
upon the axis p¹, and at its other end receives in the slots p³, the pins q¹, ¹, of
the clawkers q, r, which have slots formed in them to guide their motion on
the pins q, These two clawkers q, r, are simultaneously moved by the
action of the lever p, and are operated by a cord or band s, to pull the one for
the time required to operate into gear with the studs in the wheel on the end
of the jacquard cylinder, so as to cause that cylinder to rotate in the direction
desired, and they are otherwise kept out of the way of the teeth or studs in the
wheel on the cylinder by springs or other suitable means.
Having thus described the nature of my said Invention, and the best means
I am acquainted with for carrying the same into effect, I would have it under-
stood that I do not confine myself to the precise details shown and described,
so long as the peculiar character of any part thereof be retained substantially
as explained.
In witness whereof, I, the said Jonas Craven, have hereunto set my
..hand and seal, this Twenty-sixth day of April, in the year of our Lord
One thousand eight hundred and fifty-eight.
Witness,
::
JNO. CREYKE.
JONAS CRAVEN.. (L.S.).