IMPROVEMENTS IN BOBBIN NET, OR TWIST LACE MACHINES
Year: 1883

page_text: LETTERS PATENT to Arthur Charles Henderson of 47 Museum Street Oxford
Street in the Parish of Bloomsbury and county of Middlesex for an Invention
of IMPROVEMENTS IN BOBBIN NET, OR TWIST LACE MACHINES communicated
to him from abroad by Jules Adolphe Lateux, Superintendent of works, at
present resident at 2 Boulevard de Strasbourg in the city of Paris in the
Republic of France.
PROVISIONAL SPECIFICATION leſt by the said Arthur Charles Henderson
at the Office of the Commissioners of Patents on the 28th June 1883.
ARTHUR CHARLES HENDERSON of 47 Museum Street, Oxford Street in the
parish of Bloomsbury and county of Middlesex "IMPROVEMENTS IN BOBBIN NET
OR TWIST LACE MACHINES" A communication to me from abroad by Jules
Adolphe Lateux, Superintendent of works, at present resident at 2 Boulevard de
Strasbourg in the city of Paris, in the Republic of France.
The improvements in bobbin net machines refer to the "Levers" machine, and
relate to the finings, and stump bars of such machines
The object of such improvements being to cause the rise or fall of the weft.
threads by one and the same motion.
Each thread from the beam passes through two fining bars pierced with
rectangular slides or mortises in lieu of slots; these slides are about 16 millimètres.
spread, and so placed that one covers the other nearly a millimètre, in this manner
the bars leave a space only sufficient to allow the thread to pass.
Without any change from the ordinary method of construction, the finings bars
are each connected by a hook to the Jacquard.
On leaving the finings bars the thread traverses a fixed stump bar pierced with
a specially devised slot the size of which corresponds with the space separating
three carriages.
This opening is square and so pierced that its angles are one vertical, and the
other horizontal, each angle being between two carriages.
3

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Arthur Charles Henderson in the Great Seal Patent Office on
the 27th December 1883.
ARTHUR CHARLES HENDERSON' of 47 Museum Street Oxford Street in the
Parish of Bloomsbury and County of Middlesex IMPROVEMENTS IN BOBBIN NET
OR TWIST LACE MACHINES A Communication to me from abroad by Jutes Adolphe
Lateux Superintendent of Works, at present resident at 2 Boulevard de Strasbourg
in the city of Paris in the Republic of France
The many imitation laces made on the Lever's machine are generally produced
by aid of parts of the mechanism known as the fining bars (fines-barres) and the
upper, embroidery or spotting bars (brodeuses).
The first named bars contain the warp threads, these bars being pierced to
receive the thread, and on leaving them these threads traverso a steel bar, stump
bar or spacing instrument.
As is well known tulle is a tissue whose weft is twisted in shuttles known in
this industry as carriages.. These carriages move from front to back of the warp,
and are held in two bars, one of which is in the rear, and the other in the front,
the warp bring between these two bars:
Supposing all the carriages are in the hind bar, and that at the left of each of
them is a warp thread: torsion is produced by first passing the carriages of the
hind bar to the front one and then lifting the warp thread to the right of the
carriage, and again. passing the front. carriages. to the rear: the continuation of
these movements gives a half twist to each thread at cach traverse of the
carriages froin front to rear.
If at a given time the warp thread rises more than is necessary to twist with its
neighbouring weft thread, and that this rise is sufficient to make a twist on the
next weft thread a tie will be effected with the neighbouring thread. It is by the
combination of these twists and ties that imitation lace is formed.
All these effects are produced either as described or inversely, in the first case
the twist is made in one direction, whilst in the second it is produced in a
contrary' sense
It has been previously mentioned that the thread on leaving the warp bar
passes to a fining bar, and then to a stump bar before it commences to work. The
fining bar (which is in connection with a Jacquard or pattern surfacing machine)
by combining its movements with that of the stump bar can be displaced from
right to left.
The stump bar (whose slot is equal to the space separating two carriages) moves
in a regular and mechanical manner from right to left, and vice versa, each
movement corresponding with a traverse of the carriages.
From what precedes it will be understood that the stump bar is the instrument
which causes the warp thread to twist with the weft, and that the fining bar is
the instrument which admits of the thread twisting with the succeeding or
preceding shuttle carriage, the stump bar makes the twists, the fining bar makes
the ties.
As corollary the next bobbin weft cannot be sought to the right or left,
because for these movements the stump bar rises in the first case, and falls in
the second, so that a solidity of motion of the threads is rendered compulsory,
consequently rendering it impossible to work two warp threads (both of which
pass through the same stump bar) in such a manner that one of these warp
threads forms a tie, or a twist on the weft thread at its right hand; whilst the
other warp thread forms a tie or twist on the weft thread to its left.
These difficulties are obviated by the improvements introduced in the class of
machine referred to, and forming the subject of the present invention.

page_text: The drawings accompanying this description will explain the nature and objects
of the invention. Figs 1. 2. and 3 show difforent positions of the fining bars.
Fig 4 is a vertical section. Fig 5, shows the positions that the threads occupy in
the specially formed slots of the stump bar.
In this system each thread f from the beam passes in two fining bars a. b,
pierced with slides or rectangular mortises a¹. b', instead of slots. These slides or
mortises are about 16 millimètres wide, and are so placed, that one slide covers the
other about a millimètro; in this manner the bars. only leave a space sufficient for
the thread f, to pass (see Figs 1. 2. 3. and 4.
Each of the fining bars a. b is connected to a hook of the Jacquard in the
usual manner.
With regard to the position the bars cause the threads to occupy, if one or
the other, or both bars are drawn simultaneously, it should be observed that in
this invention the thread on leaving the fining bars. traverses the fixed stump
bar c, pierced with a specially shaped slut, the size of which corresponds with the
gait, or space separating three carriages.
This opening is square and so pierced that its diagonals are one vertical, and
the other horizontal, the right angle d, being between the two carriages k, and
Fig 1. the angles g, and h, between the two carriages k¹, and Fig 2. and finally
the angle i, between the two carriages ², k³. Fig 3.
Fig 1 shows the whole arranged as follows: the fining bars not being drawn
by the hook of the Jacquard, the thread and the mechanism is shown each in its
respective positions
In Figures 2 and 4 the bar b is represented as drawn by the Jacquard, and the
thread f, lifted into the angle g. Figures 3 and 5 show the two fining bars a
and b, as drawn simultaneously by the Jacquard, the Fining bar a, lifts the
thread f into the angle i.
The same effects can be produced by reversing the action of the fining bars,
that is to say that the bar a, can be replaced by the bar b, and the bar b, by
the bar a.
Each thread being placed in its proper fining bar, and the stump bar being
stationary each thread can occupy any required position; and simultaneously, and
by the same movement three warp threads ff.f. passed through the same
stump bar occupy the positions shown by Fig 5.
What is claimed is the arrangement and construction of the fining and stump
bars as already described, the object of the invention being to effect the rise
and fall of the warp threads, first passing from the fining bars, thence to an
upper or stump bar situate in a recess of the machine, by one and the same.
motion.
The characteristic features of the invention being the peculiar manner of
piercing the tining bars as shown by Figs 1 and 4 and the square section of the
slots in the stump bar, the angles of such openings being vertical, and horizontal
as is shown on an enlarged scale Fig 5.
Whilst claiming these particular features reserve is made to vary the square
section of the slots in the stump bar when so required.
In witness whereof I the said Arthur Charles Henderson have hereunto set
my hand and seal this twenty seventh day of December in the Year of Our
Lord One thousand eight hundred and eighty three..
TRDNAN