Improvements in Jacquards for Looms.
Year: 1890

page_text: Date of Application, 22nd Oct., 1890
Complete Specification Left, 15th July, 1891-Accepted, 19th Sept., 1891
PROVISIONAL SPECIFICATION.
Improvements in Jacquards for Looms.
I, JOHN WATSON, of Belfast Machine Works, Belfast, Ireland, Engineer, do
hereby declare the nature of this invention to be as follows:-
My improvements consist in the novel arrangement of parts, whereby the same
Jacquard machine can be worked either as a double-action single cylinder machine,
or as a double-action double cylinder machine, or as a cross bordering machine.
When the Jacquard machine is to be used as a cross bordering machine-one
cylinder will work the "repeat," and the other cylinder will work the cross
border.
According to my invention I mount on a fixed axis a slotted lever of the first
order, the slot being continuous and curved in opposite directions from the
fulcrum or fixed axis upon which said lever is mounted.
The cylinder or cylinders is or are actuated from this lever by means of linkwork
so constructed and arranged, that the working from either cylinder can be instan-
taneously effected without having to stop the loom.
And this change can be made by hand, when desired, or effected automatically
by the loom, when the required length of cloth has been woven on either repeating,
or cross-bordering cards.
Dated this 21st day of October 1890.
JOHN WATSON.
COMPLETE SPECIFICATION.
Improvements in Jacquards for Looms.
I JOHN WATSON of Belfast Machine Works Limited Leeson Street Belfast,
Engineer 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 :-
My improvements consist in the novel arrangement of parts whereby the same
Jacquard machine can be worked either as a "double-action "single cylinder machine
or as a double-action" double cylinder machine or as a "cross bordering
machine.
66
"
When the Jacquard machine is to be used as a
cylinder will work the "repeat and the other
border.
"
cross bordering" machine one
cylinder will work the cross
And in order that my said invention may be fully understood, I shall now more
particularly describe the same; and for that purpose shall refer to the several
figures on the annexed sheets of drawings the same letters of reference indicating
corresponding parts in all the figures.
Fig. 1 is a front elevation of so much of a Jacquard machine as is necessary to
illustrate my invention as applied thereto, the mechanism which constitutes my
invention being shewn in one of its limiting positions viz.:-that for working the
left-hand cylinder.
Fig. 2 is an end sectional elevation and Fig. 3 a sectional plan taken through the
centre of motion of slotted lever and shewing the elements of the mechanism.
Fig. 4 shews a front elevation representing the mechanism in its other limiting
position viz. that for working the right-hand cylinder.
Referring to Figures 1. 2. 3 & 4 A is a lever, capable of moving freely about
a fixed centre of motion in bracket T, and having a continuous circular slot formed
Real

page_text: in it, the curvature of each arm of lever being equal and opposed to each other,
from the centre of motion or fulcrum upon which the lever is mounted the radius of
curvature being exactly equal to centre's length of links P or Q-a projecting
arm B is cast or formed on this lever, and a reciprocating motion is imparted to it
by means of a rod H, which is driven by a crank or eccentric from the loom
below. R. R¹ are two rollers, capable of sliding freely within the slot in lever, these
two rollers are kept at a constant distance apart by means of a connecting link N,
whose length is exactly equal to one half the linear length of slot. E. E. are two
levers keyed on shafts L. L. which shafts pass from end to end of machine and
rotate in fixed bearings W. Q & P are two links of exactly equal length between
centre's, one extremity is pivotted to the lever E whilst the other extremity is
pivotted to the centre of roller R or R', the perforated cylinders are attached to the
cylinder slide brackets S. S. which receive their motion from the vibrating arms E
by means of the links Z.
In Figure 1-The mechanism is shewn in the position necessary for working the
left-hand cylinder the indoor stroke being just about to begin, and in Figure 4, the
mechanism is shewn in the position required to work the right hand cylinder-
the outdoor stroke being just about to begin.
The change of position from that shewn in Figure 1 to that shewn in Figure 4 is
effected by means of a link K (which is exactly the same length as link N) and
rod D which can be actuated by hand by the attendant, or if desired can be so
arranged that it can be actuated by the loom automatically, in which case a hole is
punched in either card the position of the hole "being so arranged that when the
desired length of cloth has been woven, this hole or aperture comes into such
position as allows a particular hook to lift, this motion of said hook is then
transmitted by suitable means "such as levers and cords to rod D which is thus
actuated so as to effect the desired change of position, the said change of position
can be made without it being necessary to stop the loom.
"
It will be seen that when the mechanism is in either position for working the
⚫left-hand or the right-hand cylinder, the extremity of one of the links P or Q
coincides with the centre of motion of slotted lever A so that no motion can ensue,
and as a consequence the working of the cylinder connected to said link is rendered
inoperative.
When it is desired to work the machine as a double action double cylinder
machine the inner extremities of the levers P & Q are both attached to the same
roller say R or R'.
When it is desired to work the machine as a double action single cylinder or as a
cross bordering machine, the inner extremities of levers P and Q will be attached
to different rollers R or R¹, one of which will be at the dead centre of slotted
lever A and the other at either the top or bottom extremity of said lever as shewn
in Figures 1 and 4.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is―
In Jacquard machines for looms the mechanical combination of kinematic parts
consisting of slotted lever and linkwork whereby either cylinder may be worked at
pleasure, substantially as herein before described with reference to the accompanying
drawings.
CT11001