Improvements in Bobbins, Spools, or Reels.
Year: 1893

page_text: Date of Application, 2nd Oct., 1893-Accepted, 11th Nov., 1893
Improvements in Bobbins, Spools, or Reels.
A communication from PAUL SCHUBACH, of Leitelshain, near Crimmitschau, in
the German Empire, Inventor.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent 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:—
The wooden roving bobbins which have been hitherto in use present many
disadvantages. The axial pins screwed into the soft wood in the direction of the
head of the bobbin are apt soon to become loose, during use, causing the wood to
split off from the bobbin in the subsequent weaving processes. When bobbins
without discs or plates are used, the thread when wound up loosely is apt to slip
over the edges, gets entangled and becomes consequently in most cases useless.
When on the other hand the bobbins have discs or plates, these often get bent out
of shape and render the winding of the thread difficult.
In the present invention all these difficulties are obviated.
The most essential improvement applicable both to bobbins with as well as those
without discs or plates is as follows ;-
Caps of metal (Figs. 1 and 2) are fixed over the heads of the bobbins. These
are provided each with a central aperture through which passes the axial pin c.
This latter has an enlarged conical portion for the purpose of strengthening it,
the aperture in 6 holding c c concentrically. At the same time the metal cap b is
held in position on the bobbin by means of the enlarged portion c¹ and the disc c
fixed on c. The thread of c is not however as in the older roving bobbins screwed
directly into the wooden body of the bobbin, c being inserted in the direction of the
grain but an additional special plug d of hard wood is provided as a nut for the
Ecrew. The axial pin passes transversely across the fibres of this plug, thereby
producing a high degree of firmness. A plug of hard wood is for the purpose of
this invention, preferable to a metal nut, being elastic and hence more easily
preventing the loosening of the axial pin.
In the older roving bobbins without head discs or plates as before mentioned the
loosely wound up thread often slips over the edges of the bobbin. This is due to
the fact that in the winding up all the threads are taken up in a body, torn off and
applied to the middle of the new bobbin. The latter accordingly receives more
thread in the middle than at the end and consequently the bobbin gets much
thicker in the middle while at the ends the thread is wound more loosely. When
thus spoilt at the beginning, the whole reel afterwards gets loose. Moreover the
thinner kinds of roving do not allow of being wound up very tightly whereby the
difficulty referred to is increased. To obviate this, the spool is made to taper
gradually from the ends towards the middle as is clearly shown in Figure 1. By
this arrangement the increased quantity of thread wound upon the middle of the
bobbin at the commencement of the operation is compensated and as the winding
proceeds the thread is wound over the whole reel uniformly and with equal
tension.
To prevent the thread from slipping off, the bobbin is provided either along its
whole length or only at its two ends with grooves e. These may either be ring-like
or run spirally in the manner of a screw-thread, their purpose being to act as a kind
of anchorage for the lowest layers of the threads which lie in them and thus provide
a firm hold for the whole mass of the thread.
If the bobbin is to receive a head disc there are employed discs which for the

page_text: purpose of rendering them stiffer are preferably corrugated, a much greater degree
of firmness being thereby attained without any increase of weight.
A disc of this kind is shown in Figures 2 and 3. To prevent the head disc or
plate rotating independently of the body of the bobbin, which would cause a
loosening of the axial pin, the teeth ggare punched out of the surface of the
disc fso that they stand at right angles to it. These teeth penetrate into the
head of the bobbin through corresponding holes in the cap b against which they,
as well as the disc f, are tightly drawn by means of the axial pin c with its
disc c³.
The chief features of the invention, the cap band the nut d of hard wood are
also present, in spools provided with a head disc or plate as shown in Figures 2
and 3.
Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondent, and in what manner the
same is to be performed I declare that what I claim is ;-
1. In a roving bobbin characterized by ;-
(a) A metal cap such as 6 covering its head and acting centrally upon the
axial pine by means of a conical enlargement c¹ of the latter,
(b) A plug such as d of hard wood or equivalent material inserted into the
body of the bobbin transversely across the grain from the side and receiving
the thread of the axial pin for the purpose of effecting a firm hold of the
axial pin and preventing the splitting off of the wood substantially as
described and illustrated in the accompanying drawings.
2. A roving bobbin the body of which tapers from the ends towards the middle
for the purpose of effecting an equally tight winding of the thread substantially as
described and illustrated in the accompanying drawings.
3. In a roving bobbin such as claimed in the last preceding claim the arrangement
of annular or helical grooves such as e over the whole length of the bobbin or a
portion thereof for the purpose of preventing the slipping off of the thread substan-
tially as described and illustrated in the accompanying drawings.
4. In a roving bobbin such as described the arrangement of head plates or discs such
asf which for the purpose of effecting a greater degree of firmness without increase
of weight are corrugated and are prevented from turning independently of the body
of the bobbin by teeth or points such as g g punched out of the plate and penetrating
into the body of the bobbin through holes in the cap b substantially as described and
illustrated in the accompanying drawings.
Dated this 2nd day of October 1893.
W. P. THOMPSON & BOULI,
Agents for the Applicant.