Improvement in Bobbins used in Machines for Making Lace.
Year: 1889

page_text: Date of Application, 28th Nov., 1889
Complete Specification Left, 10th July, 1890-Accepted, 16th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvement in Bobbins used in Machines for Making Lace.
I, JOHN JARDINE of the town of Nottingham, Machinist, Raleigh Street, do hereby
declare the nature of this invention to be as follows:-
Improvement in bobbins used in machines for making lace.
The object of my improvement is to make a bobbin that will contain more
material without increasing its working thickness.
By working thickness I mean the thickness of a bobbin after it is filled with
material and ready for work in the machine.
In this state the pressure of the material with which it is filled, will have forced its
edges apart so much that its thickness at its circumference will have been increased
about one in the inch.
So that a bobbin one thirteenth of an inch empty will be about one twelvth of
an inch thick when full.
But this increased thickness is greatest at the outside edges or circumference of
the bobbin, so that it is thickest at the part which first meets the warp threads
through which it is passed by the working of the machine.
That part of the bobbin nearest the rivets remains the same thickness as when
empty, the pressure of the material not affecting the part close to the rivets where
the two sides composing the bobbin are held so rigidly as to be non elastic, but
further from the rivets where the bobbin is more elastic the pressure begins to force
the two sides of the bobbin apart forming a gradually increasing curve highest at
the circumference of the bobbin.
So that the bobbins heretofore made have the great defect of meeting the warp
threads with the thickest part of the bobbin, and containing the material in its thinnest
part, combining the maximum of obstruction with the minimum of capacity.
I remedy this defect by subjecting the two sides of the bobbin when turned and
ready for rivetting-to the action of a pair of embossing stamps, and corrugate or dish
each side of the bobbin, in the recess turned out of it for holding the material and so
form on each side of the bobbin-in the comparitvely non elastic part-a conical
swelling-bead-dish-or corrugation-which increases the thickness of the bobbin
in that part about one or more in the inch.
So that the bobbin when filled and ready for work is as thick in the whole of the
part containing the material, as it is at its circumference and thus I obtain a bobbin
which contains much more material, and is owing to the enbossing much stronger,
and whose working thickness is not increased.
Dated thin 97th IN ambay 1940
JOHN JARDINE,
Raleigh Street, Nottingham.
COMPLETE SPECIFICATION.
Improvement in Bobbins used in Machines for Making Lace.
I, JOHN JARDINE, of the town of Nottingham, Machinist, Raleigh Street, do bereby
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,
reference being had to the accompanying drawings and to the letters and figures
marked thereon, that is to say :-
The object of my invention is to construct a bobbin that will contain more material
than heretofore without increasing its working thickness.
59

page_text: by working thickness I mean the thickness of a boboin after it is uned with
material and ready for work in the machine.
In this state the pressure of the material, with which it is filled, will have forced its
edges apart so much that its thickness at its circumference or periphery will have been
increased one in the inch, so that a bobbin one thirteenth of an inch when empty, will
be about one twelth of an inch when full.
But this increased thickness is greatest at the outside edges or circumference of the
bobbin, hence it is thickest at that part which first meets the warp threads through
which it is passed by the working of the machine.
That part of the bobbin nearest the rivets remains the same thickness as when
empty, the pressure of the material not affecting the parts close to the rivets where the
two sides composing the bobbin are held so rigidly as to be non-elastic, but further
from the rivets, where the bobbin is more elastic, the pressure of the material wound
thereon begins to exert itself and to force the two sides of the bobbin apart, thus
forming a gradually increasing curve, highest at the circumference or periphery of the
bobbin; the result is that bobbins, as heretofore constructed, have the great defect of
meeting the warp threads with their thickest part, and containing the material at
their thinnest part, combining the maximum of obstruction with the minimum of
capacity.
Now, according to my invention, I remedy this defect by subjecting the two
sides of the bobbin, when turned and ready for rivetting, to the action of a pair
of embossing stamps, and dish or corrugate each side of the bobbin in the recess
turned out of it for holding the material, whereby I form, on each side of the
bobbin, in the comparatively non-elastic part, a conical swelling, dish, bead, or
corrugation, which increases the thickness of the bobbin in that part about one or
more in the inch. Hence, the bobbin when filled, and ready for work is thicker in
the whole of the part containing the material, than it is at its circumference, and thus
I obtain a bobbin which is capable of containing much more material and is, owing to
the embossing, much stronger, while its working thickness is not increased.
And in order that my invention may be readily understood I will proceed to
describe the same fully, with reference to the accompanying drawings.
Fig. 1 is a front elevation, and Fig. 2 a cross section, shewing my improved bobbin
when empty.
Fig. 3 is a cross section, similar to Fig. 2, but showing the bobbin as it would
appear when filled.
These figures are drawn to a greatly exaggerated scale for sake of clearness.
a, a, are the two discs constituting the bobbin, and b, b, are the rivets securing
them together, as is usual.
c is the recess which is formed by turning in a lathe, and is for containing the
material. Each of these discs, after the turning operation is, for the purpose of my
invention, dished at d (as seen clearly in fig. 2) by subjecting the same to the action
of a pair of embossing stamps. When the bobbin is filled with material, these dished
portions, by reason of their elasticity, open out and assume the position shown in
fig: 3, that is to say, the sides become parallel, or nearly so, to each other.
I wish it to be understood that I am aware, previous to my invention, bobbins have
been made by dishing alone, but this method of manufacture has been abandoned for
many years; such bobbins containing much less material, and not being so strong as
the bobbins made by turning out, in a lathe, the recess required for the material.
Whereas, by my method, I turn out the recess in a lathe, in the ordinary way and
afterwards dish the two sides of the bobbin, so that my method commences with
turning and finishes by dishing the recess already turned.
Having now particularly described and ascertained the nature of my invention and
in what manner the same is to be performed, I claim :-
1. The improved construction of bobbin, for use in machines for making lace,
having its turned out recesses for holding the material so dished or embossed as to

page_text: form a conical or taper swelling, dish, bead, or corrugation, whereby it is rendered
capable of containing a greater quantity of material, and wher. filled and ready
for work is thicker in the whole of that part containing the material than at its
circumference and that without increasing its "working thickness," substantially
as herein described.
2. The improved bobbin, having its recessed portions c dished at d to form a conical
or taper swelling, as described and shewn with reference to figs. 1 and 2 of the
annexed drawings.
of July
ERNEST DE PASS,
6, Victoria Street, Nottingham, Agent for the Applicant.