IMPROVEMENTS IN POWER LOOMS
Year: 1876

page_text: LETTERS PATENT to Alexander Chalmers Dickson, of the Town and County
of Peebles, North Britain, for the Invention of "IMPROVEMENTS IN POWER
LOOMS."
Sealed the 16th March 1877, and dated the 26th October 1876.
PROVISIONAL SPECIFICATION left by the said Alexander Chalmers Dickson
at the Office of the Commissioners of Patents on the 26th October 1876.
ALEXANDER CHALMERS DICKSON, of the Town and County of Peebles, North
Britain. "IMPROVEMENTS IN POWER LOOMS."
This Invention, which relates to improvements in power looms, has for its objects
to simplify the node of connection between the machine and the under levers or
jacks attached to the shaft of the leaves. Instead of connecting the jacks or levers
indirectly to the machine through the intervention of a lever having one end
attached to the machine and the other connected by a wire to the under levers or
jacks, the latter are under this Invention actuated directly from the machine, being
connected thereto by a wire, the end of which passes over a pulley conveniently
attached to the machine and is connected to the upright hook which is raised and
depressed alternately in the action of the machine. Economy of power arising
from direct motion is thus effected, as also is economy of material by dispensing
with the top levers, and in the reduction of the number of parts or members both
above and below the leaves whereby the labour of the attendant is lessened and the
strain on the yarn and on the leaves is also diminished.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alexander Chalmers Dickson in the Great Seal Patent Office on the
24th April 1877.
ALEXANDER CHALMERS DICKSON, of the Town and County of Peebles, North
Britain. "IMPROVEMENTS IN POWER LOOMS."
My said Invention, which relates to improvements in power looms, has for its
objects to simplify the mode of connection between the jacquard machine and the
[Price 4d.1

page_text: leaves and under levers or jacks attached to the shaft of the leaves. Instead of
connecting the jacks or levers to the jacquard machine in the manner hitherto
practised, that is to say, connecting them indirectly through the intervention of top
levers having one end attached to and operated by the machine whilst the other
end is connected by a wire to and operates the under jack or lever, the said under
levers or jacks are, according to my said Invention, actuated directly from the
jacquard machine, each of them being connected by a wire or cord to a separate
upright hook which is raised and depressed alternately in the action of the machine.
The upright hooks are also connected to the upper sides of the leaves by wires or
cords passing over pulleys supported on the frame of the loom. Economy of power
arising from direct motion is thus effected, and the strain on the yarn and on the
leaves is at the same time diminished whilst the liability to breakage in the working
of the loom is materially lessened.
And in order that my said Invention may be properly understood, I now proceed
more particularly to set forth the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, reference being had to the
annexed Sheet of Drawings and to the letters and figures marked thereon, that is
to say :-
On the Sheet of Drawings hereunto appended, Figure 1 illustrates one method
under which the connexion between the jacquard machine and the under levers or
jacks A, and between the machine and the top rails of the leaves B may be made,
according to my said Invention both the top rail of the leaves B and the levers or
jacks A being connected by cords or wires c to the vertical hooks d constituting
part of the jacquard machine and which rise and fall during its action.
Figure 2 illustrates another arrangement of the levers or jacks A, and in this as
well as in the preceding modification the jacquard machine is situated at one end of
the loom frame.
Figure 3 shows the method of connecting the cords or wires c from the upper
rails of the leaves B, and the cords or wires e from the jacks to the vertical hooks d
when the jacquard machine is placed at the centre of the top part of the loom frame.
It is however preferred to connect the said cords or wires in the manner shewn at
Figures 1 and 2.
Figure 4 is a detailed view drawn to a larger scale of the vertical hook which it
is preferred to employ in conjunction with my said Invention.
The improved connexion herein-before described is used with each leaf of the
loom.
Having now described and particularly ascertained the nature of my said Inven-
tion, and the system, mode, or manner in or under which the same is or may be used
or practically carried into effect, I would observe in conclusion that what I consider
to be novel and original and therefore claim as the Invention secured to me by the
herein-before in part recited Letters Patent is, connecting the leaves and the under
levers or jacks of power looms direct to the jacquard machine by means of wires
or cords in the new or improved manner set forth and whereby the top levers
hitherto used in power looms are dispensed with, substantially as herein-before
described, with reference to the several Figures on the accompanying Sheet of
Drawings.
In witness whereof, I, the said Alexander Chalmers Dickson, have hereunto
set my hand and seal, this Twenty-first day of April, One thousand eight
hundred and seventy-seven.
ALEXANDER CHALMERS DICKSON. (L.S.)