Improved Machine for Making Twist-lace Fabrics.
Year: 1889

page_text: Date of Application, 25th Oct., 1889
Complete Specification Left, 23rd Aug., 1890-Accepted, 20th Sept., 1890
PROVISIONAL SPECIFICATION.
Improved Machine for Making Twist-lace Fabrics.
We JAMES ROBINSON HANCOCK, Wood Street, Beeston, Nottinghamshire, Machinist,
and HENRY DOBBS, 20 Stoney Street, Nottingham, Lace Manufacturer, do hereby
declare the nature of this invention to be as follows:-
Each machine consists of a pair of end standards, and one or more intermediate
standards connected by a floor plate or plates, and the requisite number of tie bars,
the framing forms or supports bearings for the several parts combined in a twist lace
machine of the usual construction so arranged as to work in combination with the
following additional parts.
Above the tops of the carriages usually employed we provide each machine with
front and back combs, each forming the segment of a circle, each comb blade is
formed with two sides rivetted together at the bottom edge, the upper edges allow the
web of a carriage to pass hetween them.
Each carriage is somewhat thicker than those usually employed which pass to and
fro beneath them, the additional carriages have each a grooved segment cut in each
side near the bottom each side of which slides in grooves cut within the sides of the
comb blade thus preventing the carriage from falling through the comb or rising out
of it.
The body of each carriage above the web has a circular recess cut in one side
nearly the depth of the thickness of the carriage leaving only a thin plate at the
other side, from the centre of which a stud projects on which a bobbin revolves,
the bobbin being of the same thickness or nearly so, as the depth of the recess in the
carriage.
The ends of each carriage has a tail and recess to receive the nose of the blade of
one of a pair of catch bars, one catch bar is placed at the front and the other at the
back of the centre of the machine.
Each catch bar is supported by arms projecting from a spindle bar carried by arms
secured on a rocking shaft, the shafts and spindle bars are each rocked by links and
truck bearing lovers operated by cams on the usual cam shaft, which shaft carries the
whole of the cams hereafter mentioned.
Instead of casting the comb blades in leads and securing them to one comb bar at
the front and another comb bar at the back of the centre of the machine, each two
sided comb blade is provided at the back with a T shaped foot by which it is secured
to one of a series of flat horizontal bars placed in tiers one above the other; one series
being at the front and the other at the back of the centre of the machine.
The back edges of the whole of the horizontal bars are grooved their whole length,
to receive the projecting portions of a number of sleys placed the required distance
apart and supported by two flanged sley bars nearly the length of the machine, one at
the front and the other at the back of the centre.
Each comb blade besides being supported by the horizontal bar, has its lower end
resting on and sliding in a groove cut in the top side of the flange of the sley bar, and
the top of each blade slides in a groove cut in the underside of a bar nearly the length
of the machine secured to the sley bar, which is carried by levers rocking on a joint
at each end of the machine. Each sley bar is supported intermediately by one or
more slotted segments secured to the tie bars of the machine in which friction
segments carried by arms secured to the sley bar slide, the rocking of the levers
and sley bars is effected by connecting rods attached to arms secured on rocking
shafts, one at the front and the other at the back of the centre operated by cams.
Each of the horizontal bars carrying the comb blades are traversed independently
by the operation of a spring or string dropper jacquard at one end of the machine,

page_text: the boxes of which are connected to one end of the horizontal bars, and the other
end to springs in the usual way.
By means of a machine constructed as above described we are enabled to traverse
the threads or cords, carried by the upper additional tier of bobbins and carriages,
either upon the front or back of the twist lace fabric made in the machine, or to lap
any or all of such threads, or cords entirely round any or all of the warp threads or
spool threads carried by the steel bars usually employed, or round the bottoin
carriage threads alone, or round the warp or spool threads, and the bottom carriage
threads together, according to the pattern punched in the jacquard cards.
By which means we are enabled to produce varieties of ornamental effects on either
or both sides of the fabrics made in the machine, heretofore unattainable.
Dated this Twenty-fourth day of October 1889.
H. W. GOUGH, C.E.,
Agent.
COMPLETE SPECIFICATION.
Improved Machine for Making Twist-lace Fabrics.
We, JAMES ROBINSON HANCOCK, Wood Street Beeston, Nottinghamshire,
Machinist, and HENRY DOBBS, 20 Stoney Street 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 :-
DESCRIPTION OF THE DRAWINGS.
on
Figure 1 shows a right side view of the upper part of the standard A at the
right end
of the machine, the front terminates
three feet four inches below the front driving shaft in a
in a foot A². Various shafts, truck bearing levers links and
each severally referred to hereafter.
the floor line at
foot A' and the back
cams, are also shown
Figure 1 shows a right side view of the truck lever and cam which rocks the
work roller in the usual way.
Figure 2 shows a right side view of the upper part of the central standard B, an
intermediate standard B³ with the various shafts in section, and the remainder of the
truck bearing levers links and the cams for operating the catch bars the front of the
central standard terminates on the floor line in a foot B' and the back in a
foot B².
Figure 2 shows a right side view of the truck bearing levers and cans which
operate the upper comb bars.
Figure 2B the truck levers and cams which operate the top catch bars.
Figure 3 is a front view of the right end of the machine showing one set of truck
levers, links, and cams required.
Figure 4 is an enlarged sectional view showing the whole of the moveable bars and
instruments in their several relative positions.
Figures 5 show a side view and edge view enlarged of one of the lower tier of
carriages and bobbins we employ.
Figures 6 show an enlarged side view and edge view of one of an additional upper
tier of carriages and bobbins.
Figure 7 shows a side view of one of the grooved combs in which one of
the upper carriages slide the back of the comb being shown secured in the bar
which traverses it and
Figure 8 shows an inner edge view of one of the combs without its
traversing bar.
Each machine consists of a pair of end standards A "see Figures 1 and 3" a
central standard B and four intermediate standards BB " see Figure 2" the whole

page_text: connected by a floor plate A³ an upper tie bar A' and a central tie bar A³. The
framing forms or supports bearings for the several parts as follows
From each end standard a bracket A projects inwards "see Figure 3" and forms
an additional support for the inner end of a joint pin, the outer end of which is carried
by the end standard in the usual way. Three pair of joints swing on each joint pin,
the pair marked 1 and 2 carry respectively the ends of the front and back
comb bars, 3 and 4 carry the ends of the front and back landing bars in the
usual way. And the pair marked 5 and 6 carry respectively the front and back
additional upper comb bars Csee Figure 4."
The whole of the movements of the several parts of the machine are effected by
means of four sets of cams carried by a cam shaft B' caused to revolve by bevel
toothed gearing B driven by a bevel wheel B on the left end of a driving shaft B'
provided with pulleys BB in the usual way.
The gearing is shown only in outline at Figure 2, the shaft revolves in bearings on
the front of each standard, and in a bearing bracket projecting from each end
standard one of which is shown at Figure 3. Between the bracket bearings and each
end standard the driving shaft forms a crank each provided with a connecting rod B
see Figures 1 and 3" hinged at its back end to a lever B, projecting from, the
usual draw shaft B₁ a second lever on the same shaft near each end, being hinged to
a lever B12 having its upper end hinged to the front landing bar b" shown at
Figures 3 and 4."
"
The draw shaft is also provided near each end with a lever b¹ hinged to a link b
attached to the back landing bar, the lower edge of each landing bar carries a truck 68
at the centre of its length which run on the usual saddle & the front half of which is
cast on the central standard, and the back half is secured on the central tie bar
"shown at Figure 2." Above the landing bars are the usual catch bars c
see Figures 3 and 4" hinged to brackets c' projecting from the outer sides of the
landing bars, both bars at each end are provided with arms c2 projecting towards the
centre of the machine, and hinged to the lower ends of links c³ each carried by a
lever shown at Figures 2 and 3" which rock on a shaft c carried by the whole of
the standards, the levers being alternately raised and lowered by cams c for operating
the lower tier of carriages and bobbins in the usual way.
"
The whole of the above described parts are portion of those usually employed in the
construction of machines for making twist lace fabrics, but arranged to work in
combination with the following additional parts.
Above the tops of the carriages e usually employed we provide each machine with
front and back comb blades C, each forming the segment of a circle, each comb is
formed with two sides joined together at the bottom edge, to allow the web of a
carriage E to pass between the upper edges "see Figure 4."
The carriages E form a second additional iier which pass to and fro across the centre
of the machine above the carriages c'.
Each carriage E is somewhat thicker than those usually employed and is provided
with a bobbin E kept in position by a spring in the usual way as shown at Figure 6.
Each of the carriages E have a grooved segment cut in each side near the bottom
which slides in grooves cut within the sides of the comb blades C thus preventing the
carriage from falling through the comb or rising out of it. Instead of casting the
comb blades in leads and securing them to front and back comb bars, each two sided
comb blade is formed with a projection at the back by which it is secured to one
of a series of flat horizontal bars D placed in tiers one above the other, one series
being at the front, and the other at the back of the centre of the machine as
shown at Figure 4. Each comb blade is supported by its lower end resting on and
sliding in a groove cut in the top side of the lower flange of an additional comb
bar C and the top of each comb blade slides in a groove cut in the underside of
bar which is secured to the bar "shown at Figures 3 and 4." The front
comb bar being carried by the joints 5 near each end, and the back comb bar by the
oints 6. Each comb bar is also supported intermediately by four slotted
egments secured to the intermediate standards B³ of the machine, arms

page_text: secured to the comb bar carry friction segments C3* which slide in the slotted
segments.
The rocking of the joints and additional comb bars is effected as follows:-
The front comb bar ( has a connecting link Cattached to each end having its
upper end hinged to an arm secured on a shaft C which rocks in bearings on
each standard, the rocking being effected by a truck bearing lever operated by a
see Figure 24" The back comb bar has a link C* attached to each end,
the upper end of each link being hinged to the lower arm of an elbow
lever rocking upon the shaft C the upper arm carrying a truck operated by
a cam C8*.
cam (8
The to and fro movements of the additional carriages E and their bobbins E¹
across the centre of the machine are effected as follows: The cam shaft near each end
is provided with two cams E2 E3 shown in side view at Figure 2B, each cam E
operates a truck hearing lover E³ secured on a shaft F which rocks in bearings in
each standard at the back see Figure 2."
The shaft E carries four levers D each hinged to the upper end of a link D² the
lower end of which is hinged to a bearing lever I³ which rocks on an axle secured
in an intermediate standard.
See
The four bearing levers carry a shaft D provided with an arm D' at each end
carrying a truck D which runs on the back of an incline cradle
Figures 2, 3 and 4." The cams E3 operate a truck bearing lever E5* secured on
each of two shafts E** carried by the two intermediate standards between the central
and end standards.
Each shaft E✶ carries two levers D** each hinged to the upper end of a link D2*
the lower end of which is hinged to a bearing lever D³ which rocks on an axle secured
in an intermediate standard.
The levers * carry a shaft D** provided with an arm D at each end each carrying
a truck D which runs on the front of the incline cradle D7. Each of the levers DI*
is hinged to the lower end of a link Da hinged to the front end of a double ended
lever D carried by a shaft Do which rocks in bearings at the top of each standard,
at the front, the back end of the lever D carries a link D" having its lower end
hinged to a hand lever D¹ the back end of which rocks on the front shaft C.
The back shaft D has six arms E' secured on it which carry a back catch bar E'
this bar engages with the recesses at the back of the additional carriages E. The
front shaft has six arms E* secured on it which carry a front catch bar E'* this
bar engages with the recesses at the front of the carriages E.
Points are cast in leads F and secured to point bars F¹ the one at the back and the
other at the front of the centre of the machine, each bar being carried by four
arms shown only at Figures 1 and 4" each arm 2 is hinged to a truck bearing
lever F3 operated by a cam F. The front arms F2 are hinged to a truck bearing
lever operated by the cam F** the cams F and F* lifting the back and front
point bars and points alternately at each motion of the machine.
The in and out movements of the back point bar and points are effected by a link G
the front end of which is carried by an axle secured in the arm the back end of the
link being hinged to the lower arm of a truck bearing lever G' operated by one of
four knock out cams shown only by dotted lines at Figure 1.
The in and out movements of the front point bar and points are effected by a link G*
the front end of which is carried by an axle secured in the arm F* the back end of the
link being hinged to the lower arm of a truck bearing lever G1 operated by one of
the knock out cams G2 "shown at Figure 3," both of the truck levers G¹ and G¹*
rock upon a shaft G³ carried by the four intermediate standards.
Each of the horizontal bars D carrying the combs C are traversed independently by
the operation of a jacquard at one end of the machine, the boxes of the jacquard being
connected to one end of the bars D the other end of the bars being attached to springs
in the usual way.
The usual face bar is held in position by four brackets H shown only at Figure 2
each secured to an intermediate standard.

page_text: The movements of the lower and upper tiers of carriages and bobbins in combination
are as follows
:-
The bobbins in the carriages of both tiers are supplied with threads in the usual way
the bobbins E¹ in the upper carriages E may carry threads somewhat thicker than the
threads in the bobbins of the lower carriages or the bobbins E' may be supplied
with cords, gimps, or threads of tinsel of any required thickness or colour. At
Figure 4 the carriages of the upper tier are shown in the relative position they occupy
with respect to the carriages of the lower tier, as both sets of carriages are passing
from the front of the machine to the back when the lower carriages are at the centre
of the machine. The same relative position being maintained as the carriages are
passing from the back to the front. In both movements the whole of the carriages
and bobbins in the lower tier take the leed, being followed by the carriages and bobbins
of the upper tier, the carriages of both tiers completing their outward movements at
the same time, the threads of both tiers of bobbins, and the warp threads being held
up to the face bar by the points at each motion of the machine in the usual way.
The whole of the combs C both comb bars C¹ and the comb traversing bars D being
held up outwards clear of the centre of the machine to give room for the point bars to
descend between the inner ends of the combs and enter the threads. While the comb
bars Care held outwards the bars D are traversed in the direction of the length of
the machine by the jacquard according to the pattern.
By means of a machine constructed and operating as above described we are enabled
to traverse the threads, cords, or gimps, carried by the upper additional tier of bobbins
and carriages, either upon the front or back of the twist lace fabric made in the
machine, or to lap any or all of such threads, cords, or gimps entirely round any or all of
the warp or spool threads carried by the steel bars usually employed below the lower
tier of carriages, or round the bottom carriage threads alone, or round the warp or
spool threads and the bottom carriage threads together according to the pattern
punched in the jacquard cards.
We are thus enabled to produce varieties of ornamental effects on either or both sides
of fabrics made in the machine heretofore unattainable.
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 :-
:-
First. The employment in a twist lace machine of additional comb blades C sliding
in front and back additional comb bars C¹ (2 carried by additional joints 5 and 6,
each comb bar being supported by slotted segments C3 in which friction segments C3*
slide. The front comb bar C'having a connecting link attached to each end, hinged
to arms secured on an additional shaft C rocked by a truck bearing lever (
operated by a cam 08 to move the comb bar towards and from the centre of the
machine. The back comb bar having a connecting link C** attached to each end
hinged to an elbow lever C5° rocking upon the shaft C and carrying a truck
operated by a cam * to move the comb bar towards and from the centre of the
machine substantially as described.
Second. The employment in a twist lace machine of additional carriages E and
bobbins El provided with cords, gimps, or threads sliding to and fro in the front and
back comb blades C. The required number of comb blades C being carried by the
two tiers of horizontal bars D carried by the additional comb bars C¹ C² each bar
being provided at one end with a spring its other end being connected to the box of a
jacquard, to traverse the bar to the right or left in the direction of the length of the
machine as and for the purposes specified.
Third. The employment in a twist lace machine of additional cams E and E³. The
cams E' each operating a truck bearing lever Es to rock an additional back shaft E
carrying four levers D₁ links D2 and bearing levers D³ which carry a shaft D* provided
with an arm D and a truck D at each end, the trucks running on the back of an
incline cradle D'. The shaft D has six arms E carrying a catch bar E' which
engages with the recesses at the back of the additional carriages E to draw them

page_text: towards the back of the machine, the catch bar being lifted out of the recesses by
the cradle D' as the carriages are passing the centre of the machine towards the
front. The cams E3 each operate a truck bearing lever E* to rock two additional
shafts E carrying two levers Di* links D* and bearing levers D³* carrying a
shaft Darm D and truck D at each end, the trucks running on the front of
the incline cradle D'. The shaft D** has six arms E* carrying a catch bar E'*
which engages with the recesses at the front of the additional carriages E to draw
then towards the front of the machine, the catch bar being lifted out of the recesses
by the cradle D' as the carriages are passing the centre of the machine towards the
back, substantially as and for the purposes aforesaid.
Fourth. A machine for making twist lace fabrics in which additional joints 5 and 6,
and front and back comb bars C and C³ carry comb blades C and traversing bars D
additional carriages and bobbins E' and additional catch bars E' and E'* the
whole operating in conjunction with the front and back comb bars carrying carriages c
front and back catch bars c and front and back point bars F' and points usually
employed in twist lace machines substantially as and for the purposes specified.
Fifth. The employment in a twist lace machine of an additional upper tier of
carriages E and bobbins E¹ provided with threads, cords, or gimps, which may be
passed round one or more of the warp or spool threads carried by steel bars usually
employed in a twist lace machine, or round one or more of the bottom carriage threads
alone, or round one or more of the warp or spool threads and one or more of the
bottom carriage threads together, according to the pattern punched in the jacquard
cards employed, substantially as described for the purposes aforesaid.
Dated this Twenty-first day of August 1890.
Witness,
H. W. GOUGH, C.E.,
Nottingham.
JAMES ROBINSON HANCOCK.
HENRY DOBBS.