Improvements in Jacquards used in Looms for Weaving.
Year: 1890

page_text: Date of Application, 21st Feb., 1890
Complete Specification Left, 21st Nov., 1890-Accepted, 10th Jan.,
1891
PROVISIONAL SPECIFICATION.
Improvements in Jacquards used in Looms for Weaving.
We, FREDERICK MORTIMER, ALFREd Mortimer, of Upper Spen Mill, Gomersal
near Leeds, Worsted Stuff Manufacturers and WALTER WRIGHT also of Upper Spen
Mill aforesaid, Overlooker, do hereby declare the nature of this invention to be as
follows:-
In the ordinary Jacquard machine the bottom or "hole board" is stationary and the
shed in the warp is formed by one portion, through the medium of the harness, being
raised, and in what is known as the "counterpoise" harness one portion is raised and
the other depressed at the same time. Our invention applies to the counterpoise
harness where the bottom or "hole-board" of the machine is depressed at the same
time that the lifting knives or " griffe" is raised.
To accomplish our purpose we place at each side of the machine, in convenient
positions, levers, one end of which we connect with the ordinary "treading" lever in
a suitable manner, and the other end by means of rods of a suitable shape and strength,
we attach to the bottom or "bole board." This "hole-board" we cause to move in
slides, grooves or levers, or in any suitable manner, so that it will work in the same
vertical plane, and so that as the "griffe "is raised it will be depressed, and vice versa,
and so produce the counterpoise harness, the sinking or depressed part balancing the
rising part, and at the same time producing what is known as the "centre-shedding'
motion in Jacquards.
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و,
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By this means we claim that we obtain better and easier working by reason of the
sinking part of the harness balancing, or counterpoising the rising part, economy
of power, and that the machine can be run at a higher rate of speed.
Dated this 19th day of February 1890.
FREDERICK MORTIMER.
ALFRED MORTIMER.
WALTER WRIGHT.
COMPLETE SPECIFICATION.
Improvements in Jacquards used in Looms for Weaving.
.
We FREDRICK MORTIMER, ALFRED MORTIMER of Upper Spen Mills Gomersal
Manufacturers and WALTER WRIGHT of Upper Spen Gomersal, Overlooker do
hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
In the ordinary Jacquard machine the bottom or hole board is stationary and the
shed in the warp is formed by one portion, through the medium of the harness being
raised: and in what is known as the counterpoise harness one portion is raised and the
other depressed at the same time. Our invention applies to the counterpoise harness
where the bottom or "hole board" of the machine is depressed at the same time that
the lifting knives or griffe is raised. To accomplish our purpose we place at each side
of the machine in convenient positions, levers one end of which we connect with the
ordinary "treading lever" in a suitable inanner and the other end by rods of a suitable
shape and strength we attach to the bottom or "hole board." The hole board we
cause to move in slides, grooves, or on levers or in any suitable manner so that it will
work in the same vertical plane: and so that as the griffe is raised it will be depressed
and vice versa and so produce counterpoise harness. The sinking or depressed part
balancing the rising part, and at the same time producing what is known as the
centre shedding" motion in Jacquards. By this means we obtain better and easier
D

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working, by reason of the sinking part of the harness balancing or "counterpoising
the rising part; economy of power and the power of running at a higher rate
of speed.
And in order that our invention may be understood we proceed to describe it as
follows, and by reference to the accompanying drawings:
""
Fig. 1 is a front elevation and Fig. 2 an end elevation of a Jacquard machine. A is
the "hole or bottom board and B. the griffe. C is the lifting lever connected by a
rod to the griffe B. Each end of the bottom board A is placed in slides or grooves
inside the frame of the machine. To the top frame of the machine we pivot the
levers D D, which may be of any suitable length. One end of the levers D D is
attached to the end of the lifting lever as shown by connecting rods and the other end
to the bottom board by vertical or suitably beut connecting rods as shown. By this
arrangement it is obvious that as the griffe rises the bottom board will descend and
rice versa and so one portion of the harness will balance the other in working.
To prevent any risk of the loom recoiling or turning back, on being stopped, as
will sometimes happen with counterpoise harnesses and so cause the card cylinder to
turn when it should not, we place a cam or other arrangement after the form shown
at E Fig. 3. on the driving shaft of the loom and we pivot a catch or lever F to the
loom side or frame. As the cam revolves during the working of the loom the lever F
simply passes over it but should the driving shaft of the loom revolve in the opposite
direction the cam would be caught by F and its progress immediately arrested and the
loom stopped.
Any other arrangement of levers of suitable form would answer the same purpose.
We are aware that the bottom board has. been made to move in the vertical plane
before, but not by these means or methods.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is.
1st. The raising and depressing of the bottom board of the Jacquard machine in the
manner and by the means herein described.
2nd. The arrangements and combinations of parts as hereinbefore set forth and
described.
Dated this 19th day of November 1890.
THOS. R. ASHENHURST,
71, Ashgrove, Bradford, Agent.