Improvements in Twist Lace Machines.
Year: 1889

page_text: Date of Application, 30th Aug., 1889
Complete Specification Left, 28th May, 1890-Accepted, 5th July, 1890
PROVIDIUNAL DIEUIFICATION.
Improvements in Twist Lace Machines.
I, HERBERT REDGATE of 134ª Queen's Walk, in the Town and County of the Town
of Nottingham, Lace Manufacturer, do hereby declare the nature of this invention to
be as follows:-
The object of my invention is to make twist lace upon the tops of the carriages,
instead of on the points ordinarily employed, the carriage being so shaped and formed
as to take up the threads, which the point bars now do in Levers and Curtain Twist
Lace Machines.
In carrying my invention into effect, I dispense with the points, point leads, point
bars, cams, levers, springs, and toothed gearing, used for working the same, and I
employ in lieu thereof, a new shaped carriage, to which the necessary motions are
imparted to make the twist lace upon their tops, by the usual method of moving the
threads with guide bars, jacks, stump bars, steel bars, and Jacquard.
My new shaped carriage is in the form of a triangle, the bottom part being in the
form of a segment of a circle, extending to about a quarter of a circle or thereabouts.
The upper part of the carriage is brought to a point, which is at the centre of motion
of the carriage, and on which the fabric is formed by the aid of guide bars, and other
parts operated in the same way as in machines hitherto in use. The carriages move
backward and forward between combs, which form the circle, and this movement of
the carriages is obtained by means of catch bars carried by arms fixed to hars, which
at their ends are carried by double ended levers, whose centres of motion are
coincident with the centre of motion of the carriages; the bars carrying the catch
bars are connected by links or connecting rods, with double en led levers mounted
upon the top centre shaft, and this shaft has fixed on the end thereof, a lever, which
by a rod is connected to a crank upon the front revolving shaft, which is the prime
mover.
The catch bars are similar to those now in use, but the attachments above described,
and which form part of the new construction, are different; the catch bars, by falling
into the nibs of the carriages, and by the motion given to them, pull the carriages to
either one or the other extremity of the circle; when in that position, the threads in
the guide bars are moved as required to the right or to the left; theso movements of
the threads and the combined transverse backward and forward movement of the
carriages, (which contain bobbins on which thread is wound,) forins the fabric or
twist lace on the top of the carriage.
Dated this 30th day of August 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Twist Lace Machines.
1, HERBERT REDGATE, of 134* Queen's Walk, in the Town and County of the Town
of Nottingham, Lace Manufacturer, 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 invention relates to machines which make either plain or ornamental twist lace
upon the tops of the carriages, the carriage being so shaped and formed as to take up
the threads, which the point bars now do in Lever's and Curtain Twist Lace Machines.
In carrying my invention into effect I dispense with the points, point leads, point
bars, cams, levers, springs and toothed gearing used for working the same, and I
employ a carriage, to which the necessary motions are imparted to make the twist lace
upon the tops of the carriges by the usual method of moving the threads with guide
bars, jacks, stump bars, steel bars and Jacquard. The carriage is in the form of a
triangle, the bottom part being in the form of a segment of a circle, extending to
about a quarter of a circle or thereabouts, and it is provided with an ear or nib at each
end to enable the carriage to be moved by catch bars.
The upper part of the carriage is brought to a point, which is at the centre of
motion of the carriage and on which the fabric is formed by the aid of guide bars
and other parts operated in the same way as in machines hitherto in use.
The carriage is provided with a bobbin of an ordinary character and it has a guide
hole at the point or top.
The carriages move backward and forward between combs, which form the circle.
and this movement of the carriage is obtained by means of catch bars, which
according to my invention are carried by arms fixed to bars, which at their ends
are carried by double ended levers, whose centres of motion are coincident with the
centre of motion of the carriages; the bars carrying the catch bars are connected by
links or connecting rods with double ended levers moanted upon the top centre shaft,
and this shaft has fixed on the end thereof a lever, which by a rod is connected to a
crank upon the front revolving shaft, which is the prime mover.
The catch bars employed by me are similar to those now commonly in use but the
attachments above described, and which form part of the new construction, are
different the catch bars by falling into the nibs or ears of the carriages, and by the
motion given to them, pull the carriages to either one or the other extremity of
the circle instead of pusher bars being employed as heretofore. It follows that the
threads in the guide bars are capable of being readily and freely moved as required
to the right or to the left; these movements of the threads and the combined
transversal backward and forward movement of the carriages (which contain bobbins
on which thread is wound) form the fabric or twist lace on the tops of the carriages.
And in order that my said invention may be more clearly understood and readily
carried into effect I will proceed aided by the accompanying drawings more fully to
describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is an end elevation of parts of a twist lace machine with my improvements
applied thereto. Figure 2 is a face view of one of the carriages separately. Figure 3.
is a cross section of the operating parts of the machine, and Figure is a separate
view of a carriage, a comb, a comb bar, a catch and catch bar, and a supplemental
comb for steadying the carriages.
a represents the carriage, which is in the form of a triangle, the bottom having the
form of a segment of a circle, extending to about a quarter of a circle or thereabouts.
It is provided with a bobbin a' as usual, and the upper part of the carriage is brought
to a point a which is at the centre of motion of the carriage, and on which the fabric
is formed by the aid of guide bars 6 and other parts operated in the same way as in
machines hitherto in use; a guide hole a³ is formed as near to the point as possible for

page_text: the passage therethrough of the thread from the bobbin a', and the carriage is also
formed with a nib or ear a at each end of the segment a³, which nibs or ears are acted
upon by catch bars d to move the carriages backward and forward between combs c,
which form the circle.
By thus constructing the triangular carriages with nibs or cars at and operating them
by catch bars d, I am enabled to leave sufficient clear spice in the centre of the machine
for the free working of the guide bar threads, as the catch bars do not follow the
carriages across the machine, but one catch bar pushes the carriages a certain distance
and then rises away from the ears or nibs a' at one end of the segments a at the same
time that the other catch bar takes hold of the ears or nibs at the other ends of the
segments a and pulls the carriages the rest of the distance across the machine.
The catch bars d are operated in the manner represented in the drawings, which is
as follows. The catch bars d are carried by arms el fixed to round bars e, which at
their ends are carried by double ended levers, whose centres of motion ¹ are
coincident with the centre of motion of the carriages; the bars e carrying the catch
bars are connected by links or connecting rods with double ended levers h
mounted upon the top centre shaft i, and this shift has fixed on the end thereof a
lever which by a rod k is connected to a crank upon the front revolving shaft m
which is the prime mover.
The catch bars d are as above stated similar to those now commonly in use,
but the attachments above described, and which form part of the new construction
are different.
The catch bars & are furnished at each end with rollers &, which run on guides n, n¹
one at each end of the machine, the drawing represents the carriages drawn up to their
extreme position at the back of the machine by the back catch bar, which at such time
is within one set of the nibs or ears a³, whilst the front catch bar is by its rollers d'
resting on the horizontal portions n¹ of the guides in readiness to drop within the
nibs or ears of the carriages when the latter are moved from the back to the front of
the machine. Whilst the rollers d are travelling on the circular parts of the guides,
the catch bars d remain within the nibs or ears a' of the carriages, but when they
are travelling on the horizontal portions n' thereof, one of such catch bars & will be
gradually lifted out of the nibs or cars a', whilst the other catch bar will gradually
fall into them, until on arriving at one of the circular parts n of the guides, it obtains
a full hold of such nibs or ears at, and in the continuance of its motion, completes the
traverse of the carriages across the machine. It will be noticed on examining the
drawing, that a clear space is left in the centre of the machine for the free motion of
the warp or guide har threads o; when the carriages are at their extreme forward or
backward position, the threads o in the guide bars 6 are moved as required to the
right or to the left; these movements of the threads o and the combined transverse
backward and forward movement of the carriages a and hobbins a¹, form the fabric
or twist lace on the tops of the carriages a; c¹, c¹ are the comb bars and p is part of
the end framing of the machine.
In carrying my invention into effect I also dispense with the "facing bar," but I
use a porcupine roller g and a work roller » in the position shown in the drawing, the
periphery of the porcupine roller q being vertically over the point where the work is
made, or in other words, over the centre of motion of the carriages; the fabrics, after
traversing a portion of the circumference of the porcupine roller 9 passes to the work
roller r, on to which it is wound in the ordinary manner. Motion is communicated
to the rollers q and r by the well known means. In some cases it may be necessary
to apply additional steadying or guiding means to the carriages to prevent their being
drawn together at their tops by the drag of the warp or guide bar threads. For such
purpose I employ combs t, the leads of which are fixed to the catch bars d, as
shown at figure 4, so that as each catch bar d goes into and out of action, its attached
comb t is caused to enter and leave the spaces between the carriages, by which
means the latter will receive extra support at the time when the guide bar threads are
being traversed.
I would here remark that I am aware that it has before been proposed to employ

page_text: triangular shaped carriages with their tops placed at the centre of motion thereof, for
the purpose of completing the fabric on the carriage tops without the aid of points and
their accessories, and with ears or nibs and in particular I am aware of the
Specifications Nos. 2630 and 3030 and I make no claim to anything described
therein.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is
1: In twist lace machines the combination of parts forming the carriage shifting
mechanism consisting of the catch bars d, arms el, shafts e carrying such arms, levers f
links levers h, shaft i, arm j and means for actuating the latter arm substantially as
herein shown and described.
2: In twist lace machines, the combination of the bobbin carriage a constructed as
herein described, segmental combs c therefor, and the catch bars d, arms e¹, shafts e
carrying said arms, levers f links g, levers h, shaft i, arm j, and means for actuating
the latter arm, substantially as herein shown and described.
Dated
Day zo 1OIV.
HERBERT REDGATE.
By Harris & Mills,
23, Southampton Buildings, London, Agents.