IMPROVE- MENTS IN BOBBIN NET OR TWIST LACE MACHINES
Year: 1860

page_text: LETTERS PATENT to John Dearman Dunnicliff and Stephen Bates,
Machine Maker, both of Nottingham, for the Invention of "IMPROVE-
MENTS IN BOBBIN NET OR TWIST LACE MACHINES."
Sealed the 23rd October 1860, and dated the 17th May 1860.
PROVISIONAL SPECIFICATION left by the said John Dearman Dun-
nicliff and Stephen Bates at the Office of the Commissioners of Patents,
with their Petition, on the 17th May 1860.
We, JOHN DEARMAN DUNNICLIFF and STEPHEN BATES, Machine Maker,
both of Nottingham, do hereby declare the nature of the Invention
for "IMPROVEMENTS IN BOBBIN NET OR TWIST LACE MACHINES," to be as
follows:-
This Invention has for its object improvements in bobbin net or twist lace
machines. For which purpose, in constructing Levers' or single tier machinery,
to which classes of machinery our improvements are more particularly appli-
cable, two additional comb bars are applied, one at the front and one at the
back of a machine, in such manner that such additional comb bars may have
ordinary "shoggings" or endway motions given to them, and also other
motions, so that they may go out of position for a time, and again come into
position to receive the carriages, or some of them. The ordinary comb bars
may have endway or shogging motions, and they may also rise and fall, or
move into and out of position; and in combination with the use of such extra

page_text: or additional comb bars, jacquard, or other suitable pattern surfaces are used
to select the carriages. By these means a more varied and greater capa-
bility is obtained for traversing the carriage threads, also for producing twists
of carriage threads around carriage threads, also for producing varied weavings
and twisting of the several threads, and also for producing purls.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Dearman Dunnicliff and Stephen Bates in the Great
Seal Patent Office on the 17th November 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
DEARMAN DUNNICLIFF and STEPHEN BATES, Machine Maker, both of Notting-
ham, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of May, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-third year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said John Dearman Dunnicliff and Stephen Bates, Her special licence
that we, the said John Dearman Dunnicliff and Stephen Bates, our executors,
administrators, and assigns, or such others as we, the said John Dearman
Dunnicliff and Stephen Bates, our executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at
all times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN BOBBIN NET OR TWIST LACE MACHINES," upon the condition
(amongst others) that we, the said John Dearman Dunnicliff and Stephen
Bates, our executors or administrators, by an instrument in writing under
our or their hands and seals, or under the hand and seal of one of us or them,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same
to be filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said John Dearman Dunnicliff and Stephen
Bates, do hereby declare the nature of the said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof, that is to say:-
This Invention has for its object improvements in bobbin net or twist

page_text: lace machines. For which purpose, in constructing Levers' or single tier
machinery, to which classes of machinery our improvements are more par-
ticularly applicable, two additional comb bars are applied, one at the front and
one at the back of a machine, in such manner that such additional comb bars
may have ordinary "shoggings" or endway motions given to them, and also
other motions, so that they may go out of position for a time, and again
come into position to receive the carriages, or some of them. The ordinary
comb bars may have endway or shogging motions, and they may also rise and
fall, or move into and out of position; and in combination with the use of
such extra or additional comb bars, jacquard or other suitable pattern surfaces
are used to select the carriages. By these means a moro varied and greater
capability is obtained for traversing the carriage threads, also for producing
twists of carriage threads around carriage threads, also for producing varied
weavings, and twisting of the several threads, and also for producing purls.
Having thus stated the nature of our Invention, we will proceed more fully
to describe the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a transverse section of part of a twist lace single tier
machine full size; Figure 2 is a transverse section of the machine on a
reduced scale; Figure 3 is a left-hand end view of the machine; Figure 4 is
part of a front view; Figure 5 is a back view, and the other Sheets of
Drawings show cams employed, the nature of each of which is written thereon,
and will not require further description. The machinery shown in these
Drawings are in many respects similar to what are commonly used in single
tier twist lace machinery, and some of the ordinary parts are left out. Tho
peculiarity of the Invention consists as above stated in arranging single tier
twist lace machinery in such manner that the back and front combs may each
be in two parts, which are not only independent of each other, and conse-
quently capable of separate shoggings or endway motions, but are also so
arranged as to go out of the way of the carriages for a time to allow of a
change of their position, or to allow of a change of the position of those which
remain with the carriages, by which means not only may the pairs of comb
bars which act as the front comb and as the back comb bar respectively
be used for a time as single front and back comb bars as heretofore, but by
reason of each of the parts thereof having the power to go out of the way for
a time, whilst a change is made in their relative positions, a greater variety
of effects may be produced in regard to the working of the carriage
thr ads than has heretofore been the case; such arrangements amongst

page_text: others, admitting of the neighbouring carriages being twisted round cach
other, also admitting of some of the spaces of the combs being without
carriages, and by the working of the machine to cause some of the car-
ringes to be traversed from their ordinary positions into and from the
empty spaces so left in the combs, and also admitting other variations in
the working of the carriage threads in respect to each other and to
the warp threads, which will readily be understood by. persons familiar
with the working of single tier twist lace machines. a, b, are the pair
of comb bars which constitute the front comb bar, and c, d, are the pair of
comb bars which constituto the back comb bar. The manner of working
these comb bars so that they may not only be independent in their shogging or
endway motions, but also that each may be caused to go out of the way of the
carriages for a time, may be greatly varied, but the Drawings show the arrange-
ment of mechanism which we prefer, and such is the case in respect to the
manner of selecting and actuating the carriages. The comb bar a is actuated
by its cam A, by the arm a' on the spindle bar a³, which spindle bar is
connected by the arm a³, and connecting rod a', which at its lower end. is
fixed to the comb bar a, and such connecting rod is made in parts, which
are pin-jointed so as to admit of the comb bar a being shogged and also admit
of the comb bar a being lifted up in order to see and get at the warp threads
and their guide bars. The comb bar bis similarly actuated by its cam B,
arm b¹, spindle bar b³, arm b³, and connecting rod 6. The back comb bars
c and d are respectively similarly actuated by their cams C and D, by their
spindle bars c, d, arms c, d, e, d³, and connecting rods c, d. The cams A, B,
C, D, shewn in the Drawings, are arranged to lower and raise their respective
comb bars. The carriages are shown to be in the centre of the combs and they
are selected in the following manner :-Selecting independent instruments e, e,
are used, which are arranged to slide up and down, and they are selected by a
jacquard barrel, as is well understood, and the same are similar to what have
been used in other lace machines, and the mode of their working is well under-
stood, those instruments e, which are for the time selected by the pattern card,
will, when they are moved toward the carriages, select some of the carriages,
whilst the others will be left, and at the front of the machine there are inde-
pendent spring pushers f,f, which if there were no carriages selected would
move all the carriages towards the back combs, but the spring pushers where
carriages are selected give way and allow such carriages to be moved by the
selecting instruments e towards the front combs ; h, h, are the landling bars, which
are arranged and worked as in the ordinary Levers' twist lace machines; i, i, arc
the catch bars, which are similar to those in ordinary use in Levers' machines,

page_text: they are caused to descend simultaneously by their cams and interposed
mechanism, in order to take hold of the carriages which are for the time being
in the comb bars with which they work. The comb bars a, b, c, d, may bo
shogged or moved endways by cuts of wheels, or by jacquard or other pattern
surfaces, as is well understood in respect to comb bars now in use. The nature
of the principal parts being written on the Drawings, and as their modes of
action are well understood, it will not be necessary to enter into any description
of their working beyond what is necessary to make the action of the newly
combined parts according to our Invention clearly understood by the workman.
The several comb bars a, b, c, d, being independent of each other, the order in
which they are made to go out of the way of the carriages and to return to
them may be greatly varied. In the arrangement of cams shown in the Drawings
the following is the order in which they are worked:-The carriages are shown
in Figure 1 as resting in the centre of the combs, and the following is the
manner of working a course. The selectors e, e, by their pattern surface, aro
caused to assume a position suitable for selecting some of the carriages, "the
machine" then begins to open, at which time the spring pushers are brought
into action, and they force such of the carriages as are not acted on by tho
selectors a short distance. The selectors conic into action at the same time
and force the selected carriages as much past the centre in one direction
as the spring pushers drive the unselected ones in a contrary direction. At
this time the catch bars are caused to descend, the back catch bar secures
and takes the unselected carriages, and the front catch bar takes the selected
carriages. At the time of the catch bars descending the spring pushers
are lowered so as to admit of the selected carriages moving up the combs.
The selectors are lowered and they are moved away by the opening of "the
machine." "The machine," continues to open in the ordinary manner, carry-
ing the carriages to the extremities of their outward motions, during which
time the front comb bar a descends below the carriages, and the front comb
bar 6 is shogged to the right or to the left hand, as the case may be, "tho
machine" now commences its closing movement, and the front comb bar a
ascends to its former position, and when the selected carriages in the front
combs are entering the back combs the front comb bar bis lowered, shogged,
and brought up to its former position. The carriages will then by the con-
tinued action of the machinery be again selected, and the back comb bars &
and c will be similarly acted on, as has been above described in respect to
the front comb bars a and b. It should be stated that in order to give ample
time for the descent and rising of the comb bars b and c, they need not be
caused to rise after they have descended till the selection has taken place

page_text: and "the machine," is opening. It will be seen that the opening and closing
of "the machine" is governed by cams on the driving shaft to allow time for
the selection of the carriages. We would here remark that, although we have
here described the action of the comb bars a, b, c, d, as being actuated in a
particular order by cams it will be evident that this order of their action
may be varied by using different forms of cams or other forms of pattern
surfaces.
Having thus described the nature of our Invention and the manner of
performing the same, we would have it understood that we make no claim
to the parts separately, but what we claim is the combination herein described.
In witness whereof we the said John Dearman Dunnicliff and Stephen
Bates, have hereunto set our hands and seals, this Seventeenth day of
November, in the year of our Lord One thousand eight hundred
and sixty.
JOHN DEARMAN DUNNICLIFF.. (LS.)
STEPHEN BATES.
(L.S.)
JOHN DEARMAN DUNNICLIFF.. (LS.)
STEPHEN BATES.
(L.S.)