IMPROVEMENTS IN THE MANU- FACTURE OF LACE MADE ON BOBBIN NET OR TWIST LACE MACHINERY
Year: 1879

page_text: LETTERS PATENT to Francis William Brooksbank, Henry Brooksbank, and
William Birks, junior, all of Nottingham, in the Town and County of the
Town of Nottingham, for the Invention of "IMPROVEMENTS IN THE MANU-
FACTURE OF LACE MADE ON BOBBIN NET OR TWIST LACE MACHINERY."
PROVISIONAL SPECIFICATION left by the said Francis William Brooksbank,
Henry Brooksbank, and William Birks, at the Office of the Commissioners of
Patents on the 16th October 1879.
FRANCIS WILLIAM BROOKSBANK, HENRY BROOKSBANK, and WILLIAM BIRKS,
junior, all of Nottingham, in the Town and County of the Town of Nottingham.
"IMPROVEMENTS IN THE MANUFACTURE OF LACE MADE ON BOBBIN NET OR TWIST
LACE MACHINERY."
Our Invention relates to improvements in the class of lace generally known as
bottom bar, or stump bar double warp goods.
Hitherto "Ensor's" filling or fining has been disadvantageously produced when
being made in pattern with bottom bars. Now we not only produce Ensor's
fining (two motions), Ensor's fining (four motions), double gimp fining (with
the twist off), single gimp fining (with twist on), the "wicker" cross fining, and
the imitation Chantilly fining, and several other kinds of finings. Also the
"wicker" cross net, and a novel kind of net closely resembling "Ensor's" net but
having a perfect plaited pillar, all in the same pattern of lace and at the same time;
or any one of the finings can be made separately with any one of the nets. This
result has never been obtained before with bottom bars. It is obvious that a much
greater amount of variety can be introduced into lace by our improvements than
has hitherto been done by bottom bars.
We will now proceed to describe the means by which we produce the above
results in accordance with our Invention,-
We take any lace machine having bottom bars and a one gait stump bar or its
equivalent, but we find it advantageous to use four perforated bars having one gait
perforations, each tier or bar being independant. These bars are actuated by the
ID. B

page_text: Jacquard or other pattern surface, the two back tiers of stump bars or perforated
bars are only acted upon by the jacquard when the carriages are in the back combs,
being stationary when the carriages are in the front combs.
The back bar rises one gait to the right hand whilst at the same time the second
bar from the back falls one gait to the left hand. The carriages then come into the
front combs for the front stump bars to be acted upon; when the carriages are again
in the back combs the back stump bar falls one gait to the left hand while at the
same time the second bar from the back rises one gait to the right hand.
These bars if acted upon in the reverse order to that just described will produce
the same result.
The two front tiers of stump bars or perforated bars are only acted upon when
the carriages are in the front combs, being stationary, when in the back combs the
second bar from the front rises ono gait to the right hand while at the same time
the front bar falls one gait to the left hand. The carriages are then taken into the
back combs for the back stump bars to be acted upon, when the carriages arc again
brought into the front combs the second bar from the front falls one gait to the left
hand while at the same time the front stump bar rises one gait to the right hand.
These bars if acted upon in the reserve order to that just described will also produce
the same result.
If the back tier of bottom bars are taken to the right band and the second tier from
the back taken to the left hand, or vice versa, and the two front tiers are acted on in
the same manner and are allowed to remain in that position, the continual action of
the stump bars or perforated bars as above explained will produce continuous perfect
plaited pillars, one to every carriage thread, each pillar being composed of two warp
threads and one bobbin thread.
From the foregoing description a competent draughtsman will be able to produce
all the various nets and finings before referred to, all such varieties being produced
in the same pattern and at the same time.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Francis William Brooksbank, Henry Brooksbank, and William Birks,
in the Great Seal Patent Office on the 18th March 1880.
FRANCIS WILLIAM BROOKSBANK, HENRY BROOKSBANK, and WILLIAM BIRKS,
junior, all of Nottingham, in the Town and County of the Town of Nottingham.
"IMPROVEMENTS IN THE MANUFACTURE OF LACE MADE ON BOBBIN NET OR TWIST
LACE MACHINERY."
Our Invention relates to improvements in the class of lace generally known as
bottom bar or stump bar double warp goods.
"
Hitherto "Ensor's" filling or fining has been diadvantageously produced when
being made in pattern with bottom bars. Now we not only produce "Ensor's'
fining (two motions), "Ensor's" fining (four motions), double gimp fining (with
twist off), single gimp fining (with twist on), the "wicker" cross fining and the
imitation Chantilly fining and several other kinds of fining; also the "wicker"
cross net and a novel kind of net closely resembling "Ensor's" net, but having a
perfect plaited pillar all in the same pattern of lace and at the same time; or any ono
of the finings can be made separately with any one of the nets. This result has
never been obtained before with hottom bars. It is obvious that a much greater
amount of variety can be introduced into lace by our improvements than has
hitherto been done by bottom bars.
We will now proceed to describe the means by which we produce the abovo
results in accordance with our Invention.
We take any lace machine having bottom bars, and one gate stump bars or their
equivalents, but we find it advantageous to use four perforated bars having one
gate perforations, each tier or bar being independent. These bars are actuated by
the jacquard or other pattern surface, the two back tiers of stump bars or perforated
bars are only acted upon by the jacquard, when the carriages are in the back
combs, being stationary when the carriages are in the front combs. When the
carriages are in the back combs the back stump bar rises one gait to the right hand
whilst at the same time the second bar from the back falls one gait to the left hand.
The carriages then come into the front combs for the front stump bars to be acted
upon, when the carriages are again in the back combs the back stump bar falls one
gait to the left hand while at the same time the second bar from the back rises one
gait to the right hand.
These bars if acted upon in the reverse order to that just described will produce
the same result.
The two front tiers of stump bars or perforated bars are only acted upon when
the carriages are in the front combs, being stationary when in the back combs.
When the carriages are in the front combs the second stump bar from the front
rises ono gait to the right hand, while at the same time the front bar falls one gait
to the left hand. The carriages are then taken into the back combs for the back
stump bars to be acted upon, when the carriages are again brought into the front
combs the second bar from the front falls one gait to the left hand while at the
same time the front stump bar rises one gait to the right hand. These bars if acted
upon in the reverse order to that just described will also produce the same result.
If the back tier of bottom bars are taken to the right hand and the second tier
from the back taken to the left hand, or vice versa, and the two front tiers are acted
on in the same manner and are allowed to remain in that position the continual
action of the stump bars or perforated bars as above explained will produce con-
tinuous perfect plaited pillars, one to every carriage thread, each pillar being
composed of two warp threads and one bobbin thread.
From the foregoing description and the sheet of diagrams hereto annexed a
competent draughtsman will be able to produce all the various nets and finings

page_text: before referred to, all such varieties being produced in the same pattern and at the
same time.
Figures 1, 2, and 3 of the diagrams hereto annexed shew the cuts of wheels we
employ in carrying out our improvements.
These Figures if worked in the reverse order to what they are marked will
produce the same results, providing the draughtsman reverses the draughting.
Figure 2 is a cut of wheels or pattern surfaces for extending or carrying out the
same principle over three carriages producing a perfect plaited square net, or
Malines net. These Figures can be slightly varied at the net ties to accommodate
the different finings, one example being shewn in Figure 3.
In the three diagrams of net hereto annexed, shewn on a magnified scale, the
various motions are numbered. The odd numbers are the front motions, the red
ink lines are bobbins, the black ink lines are the two front tiers of warp threads,
and the blue ink lines are the two back tiers of warp threads.
We do not confine ourselves to the exact details hereinbefore described so that
the novel and peculiar character of our Invention is retained, nor do we claim any
of the parts separately which are well known and in common use.
But what we claim is,―
The cuts of wheels or pattern surfaces for actuating the stump bars or perforated
bars substantially in the manner hereinbefore described, and represented by the
Figures 1, 2, and 3 hereunto annexed, for producing the different kinds of nets and
finings as hereinbefore described either separately or in different combinations or all
at the same time.
In witness whereof, we, the said Francis William Brooksbank, Henry Brooks-
bank, and William Birks, have hereunto set our hands and seals, this
Twentieth day of January, in the year of our Lord One thousand eight
nunored anu eignty.
F. W. BROOKSBANK. (L.S.)
H. BROOKSBANK.
(L.S.)
W. BIRKS, JUB.
(L.S.)
3