Improvements in Thread Spools or Reels.
Year: 1893

page_text: Date of Application, 10th Jan., 1893
Complete Specification Left, 10th Oct., 1893-Accepted, 11th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Thread Spools or Reels.
I CARL BACK, of IV Lambrechtsgasse, 14, Vienna in the Empire of Austria,
Merchant do hereby declare the nature of this invention to be as follows :-
This invention relates to the construction of spools or reels for thread and the
like and has for object to enable the spools to be made lighter, cheaper, and quicker
than wooden spools but resembling the latter as nearly as possible in shape. The
heads of the spool consist of stamped discs of cardboard or other suitable material
and the body is formed by bending to a tubular form a strip of sheet metal having
tangs at the ends by which the heads are secured to the ends of the body portion
the tangs being forced into the heads after the latter are slipped on to the body
portion by outwardly flanging the tanged ends of the body.
Reference is to be had to the accompanying drawings, forming part of this
Specification, in which
Figure 1 is a face view and cross-section of a metal strip a provided at opposite
sides with tangs a'.
Figure 2 is a section of the same rolled to form the body of the spool.
Figure 3 is a cross-section, Figure 4 an end view, and Figure 5 a longitudinal
section, of one form of spool.
Figure 6 is a longitudinal section of another form of spool, and
Figures 7 and 8 are detail section and end view on a larger scale, shewing the
connection of the heads to the body portion.
With the
The discs are made of cardboard or other suitable material and have a central
hole adapted to fit on the body and pressed either to a flat conical form, as shewn
in Figure 5, or to a conico-cylindrical form, as shewn in Figure 6.
conical form shewn in Figure 5 the heads may have concentric strengthening ribs
on the outer faces, as shewn in Figure 4. With the saucer-shaped form of head
shewn in Figure 6 the cylindrical part 2 serves as a stiffener and may be provided
with shoulders &³ to receive and support the edges of a strip of paper c or other
material wrapped thereon to form a false body so that the spool will hold less thread
but have the appearance of a fully wound spool.
The attachment of the heads to the body of the spool is effected by slipping the
heads on to the body and driving the tangs of the latter into the outer faces of the
heads and simultaneously flanging outwards the ends a² of the body as seen in
Figures 7 and 8. By means of these flanged ends and the tangs penetrating the
substance of the heads, the latter are rigidly fixed at the proper distance apart to
the ends of the body so that they cannot be displaced or disconnected by the strain
of the thread in winding the spool which can be wound and unwound many times
without injury, nor can the discs be shifted by pressure on their outer faces towards
the middle of the body, when the spool is empty.
When the spool is being wound a metal disc is preferably placed on the winding
spindle at each end of the spool so that the heads of the spool fit therein, in order
to support and strengthen the heads during the winding.
Dated this 10th day of January 1893.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents

page_text: COMPLETE SPECIFICATION.
Improvements in Thread Spools or Reels.
I, CARL BACK of IV Lambrechtsgasse 14, Vienna, in the Empire of Austria,
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 the construction of spools or reels for thread and has
for its object to produce a very light spool as little different as possible from
the usual wooden reel as far as shape and mode of winding are concerned my
spool being adapted to be wound on the same winding machine as the wooden
spool and being so constructed that its manufacture in great quantities may be
performed cheaper and quicker. This spool consists essentially of two stamped
discs of cardboard or other suitable material and of a body formed by bending
to a tubular form a strip of sheet metal on which the discs are slipped by their
central aperture, and on which they are rigidly fixed at the distance apart
corresponding to the length of the spool body, the ends of the body being
provided for that purpose with tangs which are forced into the discs from the
outside after the latter have been slipped on the body portion the ends of which
are at the same time flanged outwardly. Or circumferential collars are pressed
up in the rolled strip against which collars the discs bear by their inner side,
in which case the tangs may be dispensed with, the discs being secured in position
by simply flanging the untanged ends of the rolled metal strip.
In the accompanying sheet of drawings,
Figure 1 is an elevation and section of one of these body strips a shewing the
tangs a provided on two opposite edges of the same.
Figure 2 is a longitudinal section of the metal strip rolled to a tubular shape in
order to form the body of the spool.
Figure 3 is a transverse section and Figure 4 an end view of a spool embodying
this invention.
Figures 5 and 6 are longitudinal sections of two forms of the spool constructed in
the said manner.
Figures 7 and 8 are section and end view on a larger scale of part of a spool
shewing the connection of the heads or discs to the tanged body portion.
Figures 9, 10, and 11, 12 and 13, are respectively longitudinal and cross-sections,
partly shewn in end view, of modified forms of these spools.
The discs are made of cardboard or any other suitable material and have a
central aperture the interior diameter of which is adapted to fit the diameter of the
tubular body formed by bending the metal strip a. With the form shewn in
Figure 5 the heads preferably have on their outer faces circular strengthening
ribs b¹. With the cupped-shaped head shewn in Figure 6 the cupped parts b² serve
for strengthening purposes and also form shoulders to support the edges of a strip c
of paper or other material wrapped thereon whereby spools are formed that will
hold less thread, thus serving for winding shorter lengths of same but having the
appearance of fully-wound spools. The space comprised between the cupped
parts may also (as shewn in Figure 9) be filled with a hollow wooden cylinder d
adapted to fit on the metal tube a on to which it is slipped. In order that the
wooden cylinder should not revolve relatively to the metal tube during the winding
operation, the abutting edges of the strip a are flanged outwardly for a length of
about a quarter-of-an-inch from both ends and forced into the wood, as shewn in
Figure 11. In order that even surfaces may be obtained on the heads of the spools
for pasting labels the cupped parts 62, shewn in Figures 6 and 9 as stamped
inwardly, may be also formed by being stamped outwardly as shewn in Figure 10.
The discs set at a suitable distance apart may be secured rigidly to the body of the
spool by driving the tangs a¹ of this body into the discs from the outside after said

page_text: discs have been slipped on the ends of the body portion and at the same time
flanging the edges a² of said body portion, as shewn in Figures 7 and 8. By means
of these flanged edges and of the tangs forced into the material of the discs, the
latter are secured to the ends of the body at the proper distance apart, so that they
are not liable to be displaced laterally and cannot be forced asunder by the strain
of the thread when wound between them with great force, nor be shifted towards
the middle of the body by outward pressure exerted on the heads when the spool
is empty.
As shewn in Figures 12 and 13 the rigid securing of both discs b to the tubular
body a may also be effected by means of circumferential rounded shoulders f
stamped up in the tubular body a close to its ends. The discs b bear by their
inner faces against these shoulders or against collars slipped on the tubular body
and bearing against said shoulders, the discs being cupped outwardly to fit over
these shoulders or collars so that the latter are sunk flush with the inner faces of
the discs so as not to be in the way of the thread. When these shoul lers or the
aforementioned hollow wooden cylinders d are used, it suffices to simply flange
outwardly the ends of the tubular body, the tangs a' being dispensed with.
For the purpose of winding the spool on self-acting winding machines, it is
advisable that small furrows g should be pressed in the flanged edges of the tubular
body, in which furrows both spindles of the winding machine will catch.
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:
1. A spool or reel consisting of a body a made of a metal strip rolled to a
tubular form having tangs a' at the ends and of heads centrally apertured to fit
on the body made of cardboard or other suitable material pressed to a conical or
cylindro-conical form and firmly fixed upon the ends of the body a by flanging the
ends of the latter and pressing the tangs a' into the outer faces of the discs,
substantially as specified.
2. A spool consisting of a body a made of a sheet metal strip bent or rolled to a
tubular shape having tangs al at the opposite ends, or untanged, and having
circumferential rounded shoulders or collars near the ends and of two conical or
cylindro-conical cupped discs centrally apertured, made of cardboard or other
suitable material which are slipped on the ends of the body a, bear against said
shoulders or collars f, and are securely fastened to the body portion by flanging the
edges of the latter and when tangs are provided by driving the same into the outer
faces of the discs.
3. A spool in which the inner faces of the discs have central recesses within
which the shoulders or collars f of the tubular body are sunk.
Dated this 10th day of October 1902.
C. BACK,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.
C. BACK,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.