IMPROVEMENTS IN BOBBIN AND FLYER SPINNING MACHINERY
Year: 1877

page_text: LETTERS PATENT to Edward Alfred Cowper, of No. 6, Great George Street,
Westminster, in the County of Middlesex, for the Invention of "IMPROVEMENTS
IN BOBBIN AND FLYER SPINNING MACHINERY."
Scaled the 8th May 1877, and dated the 12th March 1877.
PROVISIONAL SPECIFICATION left by the said Edward Alfred Cowper at
the Office of the Commissioners of Patents on the 12th March 1877.
EDWARD ALFRED COWPER, of No. 6, Great George Street, Westminster, in
the County of Middlesex. " IMPROVEMENTS IN BOBBIN AND FLYER SPINNING
MACHINERY."
My Invention relates to a mode of producing the friction required for an inverted
flyer in the machines known as throstle, spinning, and doubling frames, where the.
bobbin is supported on the spindle and is driven by it.
It has been proposed to produce friction on the boss of an inverted flyer by means
of a loaded cord embracing the boss; it has also been proposed to produce friction
by a spring break bearing against the boss of the inverted flyer, and friction has
been produced by giving the flyer boss a flat surface or disc running on a flannel or
other washer.
Now my Invention consists in forming a conical, spherical, or cup-like prominence
on the under side of the boss of the inverted flyer, and a corresponding hollow on
the copping rail, and inserting between these surfaces a soft substance, such as flannel,
on which the weight of the flyer and its boss rests to give the necessary friction for
producing the drag upon the thread as it passes down from the rolls through the
eye of the inverted flyer to the bobbin which is driven by the spindle.
The hollow may be formed on the under side of the flyer boss and the convex
surface on the copping rail. When the concave surface is on the inverted flyer it
gives more hold or stability to the flyer in its revolution; but as when the convex
surface is on the flyer the washer tends to hold the oil better, because the centri-
fugal force tends to counteract the force of gravity or weight of the oil; I prefer the
latter arrangement.

page_text: Fig. 1 shews one form of my improved flyor. In this case the boss of the flyer
has a projecting conical surface A formed upon its under side, fitting into a corre-
spondingly recessed conical surface B, formed on the copping rail, a piece of soft
material C, such as flannel, being inserted between them, on which the boss of the
flyer rests, so as to produce the requisite friction or drag; Fig. 2 shows the same
arrangement as at Fig. 1, but with the cones of a sharper angle.
In Figs. 3 and 4 the recessed conical surface A is formed on the boss of the
flyer, and the projecting conical surface B on the copping rail, the angle of the cones
being sharper at Fig. 3 than at Fig. 4.
Fig. 5 shews tho boss of a flyer with a convex spherical surface A, fitting on to a
corresponding concave spherical surface B, on the copping rail, C being the flannel
or other material interposed as before; Fig. 6 shows the same construction as at
Fig. 5, but with the spherical surfaces struck with a shorter radius.
Fig. 7 shews a construction with the concave spherical surface A formed on the
boss of the flyer, and the convex surface B formed on the copping rail.
Fig. 8 shews a construction with two conical surfaces A, A, on the boss of
the flyer, fitting on to two corresponding conical surfaces B, B¹, on the copping rail.
Figs. 9 and 10 shew two different forms of convex and concave rounded surface
formed on the boss of the flyer and on the copping rail.
This Invention is applicable to the spinning, doubling, and twisting of cotton,
silk, worsted, woollen, linen, and other fibrous materials.
Having thus described the nature of my said Invention, and in what manner the
same is to be performed, I claim constructing the bosses of flyers with a conical,
spherical, or rounded surface fitting on to or into a corresponding conical, spherical,

page_text: or rounded surface on the copping rail, substantially as and for the purpose herein
described.
In witness whereof, I, the said Edward Alfred Cowper, have hereunto sot
my hand and seal, this Thirtieth day of August, in the year of our
Lord One thousand eight hundred and seventy-seven.