Improvements in Yarn-beams for Looms.
Year: 1890

page_text: Date of Application, 30th Dec., 1890-Accepted, 31st Jan., 1891
COMPLETE SPECIFICATION.
Improvements in Yarn-beams for Looms.
We JOSEPH LINDSAY, and ROBERT LINDSAY, of 4 Somerville Place, Dundee,
in the County of Forfar, North Britain, Engineers, 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, that is to say:-
Our said invention has for its object to improve and simplify the construction of
yarn beams for looms; and it consists principally in making the end flanges or disks
of such beams of comparatively thin steel or wrought iron shaped to give the
requisite strength or stiffness and provided with suitable naves or bosses by means
of which they are fixed on the barrels or tubes of the beams. We prefer to combine
our improved construction of end flanges with the arrangement described in our
Complete Patent Specification No. 1916 of 1890, in which the drag or frictional
tension appliances are applied, not as in ordinary looms, directly to the yarn beam,
but to separate pulleys geared to the beam by toothed wheels; and in this case the
end flanges may be made entire. In other cases, or when desired, some modifications
of our improved end flanges may be made in halves.
On an accompanying sheet of explanatory drawings are shown a selection of
modifications of yarn-beam end flanges or disks as made according to our invention.
Figures 1, 3, 5, 7, and 9, are outside elevations, and Figures 2, 4, 6, and 8, are
vertical sections each as at right angles to, and corresponding to the preceding
figure. In these drawings the same reference letters are used to mark the same or
like parts wherever they are repeated.
In every modification delineated the end flange or disk, A, is made of thin plate
steel, and with a flange, B, formed round its outer edge to impart stiffness. As the
inner side of each end flange, A, has to be perfectly Hat, the yarn being in contact
with it when wound on the beam, little or no variation can be made in the shape of
the disk, and the outer flange, B, imparts the necessary stiffness in the simplest and
best manner.
If considered desirable, however, the disk may be stiffened otherwise
in addition to or instead of having the outer flange, B, as for example by small
radial corrugations not projecting inwards from the inner face and not interfering
appreciably with the yarn.
For fixing the end flange or disk, A, on the barrel or tube of the beam, we may
employ a castiron nave or boss, C, as shown in Figures, 1, and 2, this boss being
riveted to the disk, A, and being fitted with a pinching screw, D, for securing it on
the beam barrel or tube. The screw, D, is shown as having loosely riveted to its
inner end a cod piece, E, to increase the surface bearing on the barrel or tube.
When the end flange or disk, A, is to be made in halves the modification shown
in Figures, 3, and 4, may be adopted. In this case half bosses, F, of castiron are
riveted to each half disk, and are drawn together by screws, G, acting on lugs
formed on the half bosses. Near the outer ends of the diametrical division of the
half disks, A, tongues H, are riveted to each half disk in a manner to engage each
with the other half disk and to keep them flush with each other. The construction
of the boss in halves, F, as shown in Figures, 3, and 4, may be adopted even when
the disk, A, is entire and not in halves. There will be no practical difficulty in
making the internal bearing surfaces of the half bosses, F, so nearly a fit for the
beam barrel or tube, that a very slight screwing together of the half bosses will fix
the disks without distortion.
In the modification shown in Figures, 5, and 6, the boss, J, is a wrought iron
strap made with flanged-out ends which are fitted with a screw bolt, K, for
tightening the boss on the beam barrel or tube. The disk, A is fixed to the boss, J,
by countersunk screws entered from the inner side of the disk.

page_text: Similar bosses, J, are used in the modifications shown in Figures, 7, 8, and 9. As
shown in Figures, 7, and, 8, instead of a central aperture of the size of the beam
barrel or tube being punched or cut in the disk, A, as in the modifications herein-
before described, the material of the disk near its centre is, by stamping or hydraulic
pressing or other means, shaped to form a cylindrical flange or short sleeve, L; and
the boss piece, J, is placed on the outside of this sleeve, L.
When the bolt, K, is tightened up it will cause the sleeve, L, to grip the beam
barrel or tube with sufficient firmness; and if necessary for facilitating that action,
one or more slits may be made in the sleeve, I. Or as shown in Figure, 9, a cross-
like piece such as is indicated by dotted lines may be cut out of the centre of the
disk, A, so as to leave segments which can be turned outwards and be shaped to fit
the interior of the boss piece, J.
The disk, A, may have a boss or nave fixed on it by welding. It may not always
be necessary to fix the boss pieces (C. F. or J) to the disks, A, the boss pieces
being fixed on the beam barrel or tube outside of the disks in order to keep these
disks against the yarn.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is.
Making the end flanges or disks of yarn beams for looms of comparatively thin
plates of steel or wrought iron, with the outer edges flanged outwards, the said end
Hanges or disks being entire or in halves substantially as herein.efore described.
Dated this Twenty-ninth day of December 1890.