Improvements in Spools.
Year: 1891

page_text: Date of Application, 23rd Sept., 1891-Accepted, 24th Oct., 1891
COMPLETE SPECIFICATION.
Improvements in Spools.
I, CARL BACK of 4, Lamprechtsgasse 14, Vienna, Merchant, 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 :-
This invention relates to spools for thread, yarns, ribbon, etc., which may be
made of various sizes according to the material which is to be wound on them and
which are characterized by their extreme lightness and small cost.
These improved spools consist of a pair of preferably paper or cardboard discs
constituting the heads of the spool and a tubular metallic core to which the discs
are secured in such manner as to prevent the discs from becoming detached.
The invention will be described with reference to the accompanying drawings
forming part of this Specification in which
Figures 1 to 4 shew sections in the plane of their axes of spools differing slightly
from one another but all made in accordance with this invention.
Figure 6 is a section of one of the heads or discs of the spool shewn in side
view in Figure 5.
Figures 7, 8, and 9, shew side views of spools hereafter more specifically referred
to, while
Figures 10 to 19 illustrate different methods of making the cores.
A are the heads of the spools having a central opening a to receive the ends of
the cores B. As these heads are discs of paper or cardboard, they may be
stamped out, perforated, and their surfaces ornamented, or any desired indication
as to quality, name of manufacturer, trade mark, etc., etc., produced on them, at
one and the same operation. The discs may be of the star shape shewn in
Figure 9 or have large holes a³ to permit of the air getting to the thread or yarn
wound on the core. In Figure 8 the heads are provided with a series of concentric
zones or perforations a connected with one another by straight rows of per-
forations at so that as the thread or yarn is used up the diameter of the heads of
the spool may be reduced by tearing off the margins of the discs, thus enabling
the free end of the thread to be found with greater facility. In order that the
discs may have the necessary rigidity, they are preferably concavo-convex or of
the dished or other forms in cross-section shewn in the drawings.
The core is hollow and is made from a metal blank which is brought to a tubular
form and attached by its ends to the discs, the said blank for this purpose having
teeth in its longitudinal edges, which after the ends of the core have been inserted
in the central perforations of the discs are bent down against the exterior surface
of the latter so as to securely hold the discs in place.
The means for retaining the discs may be varied. For example, the teeth bon
the core (see Figure 10) may be passed through slots al in the discs (Figures 5
and 6) and hent down against the outer surfaces of the latter so that the discs and
the core are locked together and this attachment may be rendered more effective
by forming the discs with an inwardly projecting flange a around the central
perforation. In Figures 7 and 11 the same effect is obtained by providing the
edges of the metal blank from which the core is made with salient points or teeth
between the teeth which teeth after the teeth have been bent down against
the outer surface of the disc are caused to enter the back of the disc. Again, as
shewn in Figure 16, the necessary support for the disc may be obtained by bending
some of the teeth at right angles to the axis of the core so as to bear against the
inner face of the disc the rest of the teeth being passed through the disc and bent
over against its exterior surface as before. Or the ends of the core may be reduced,

page_text: as shewn in Figure 17, so as to form shoulders on the core against which the discs
abut. Or the core may be composed of a pair of hollow pieces B' B of the form
shewn in Figure 18 inserted the one within the other and each having teeth >>
which are bent down against the outer surface of the discs while the inner surface
of the latter bears against the shoulders on the core. The core may, moreover, have
rims or flanges stamped in them and be, provided with washers which are
interposed between the flanges and the discs. Or, again, the same result may be
obtained by means of a sleeve 62 or 3 (Figures 12 and 15) which surrounds the
core or by the employment of a number of washers, as shewn at the right hand
portion of Figure 15. In any case the same result will be attained, the pins on
the core preventing the discs from becoming detached while the shoulders or
flanges with which the core is provided constitute distance pieces and positively
hold the discs apart.
To provide for driving or rotating the spool in the operation of filling, one of
the teeth (see Figure 19) has a slot which when bent round, as seen, forms a
notch adapted to receive the pin on the winding spindle.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1st. A spool consisting of a tubular core B made from a metal blank having
teeth in its edges and a pair of thin discs A secured to the ends of the core by
bending the teeth of the core against the discs, substantially as shewn and
described.
2nd. In a spool such as described in Claim 1, the means for maintaining invariable
the distance between the discs A and consisting of
(a) Slots a¹ (Figures 5 and 6) cut in the disc A around its central perforation
and adapted to receive the teeth 6 of the core, the disc being provided with
the flange a ;-or
(Figure 11) on the core intermediate of the teeth b
down on the outer surface and passed into the
(b) Pointed teeth
and which are bent
disc A; or
(c) Projections on the core
and constituted by rims
if desired with washers
Figures 17 and 18) or
Figures 12 and 15)
against which the rear surface of the discs bear
stamped in the core (Figures 13 and 14) provided
(Figure 14) or by shoulders on the core (as in
by rings or washers placed on the core (as in
all substantially as shewn and described.
3rd. A spool such as described in Claim 1 provided with concentric zones of
small perforations a³ connected by straight rows of holes a so that the diameter
of the discs may be lessened as the thread or other material is consumed, substan-
stantially as specified.
4th. As a new article of manufacture, spools
described and shewn in the accompanying drawings.
Dated this 23rd day of September 1891.
constructed substantially as
CARL BACK,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.