Improvements in Warping Frames by the Application of a Differential Speed.
Year: 1897

page_text: Date of Application, 18th Aug., 1897-Accepted, 16th Oct., 1897
COMPLETE SPECIFICATION.
Improvements in Warping Frames by the Application of a
Differential Speed.
I, JOHN OWDEN O'BRIEN, M.I.Mech. E., of the Firm of W. P. Thompson & Co.,
of 6 Bank Street, Manchester, Liverpool and London in the Counties of Lancaster
and Middlesex, respectively, Patent Agents, (a communication from Arthur
Duhem, of Lille, in the Republic of France, Cloth Manufacturer), 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 present invention is designed to remedy a great drawback in all warping
frames hitherto in use. As is well known these frames run at a constant and
invariable speed, the result of which is that the production cannot be regulated
according to the condition of the bobbins in the creel or the nature and quality
of the materials.
In fact at the commencement of the operation when the creel has just been
supplied with a set of full bobbins, that is to say having their maximum diameter,
the warping beam is empty, that is at its minimum diameter. As the rotary speed
of the beam is constant the bobbins will revolve very slowly at the commence-
ment, but will increase in speed as the beam becomes full and the bobbins empty.
Thus for the reasons given the bobbins will revolve at the end of the operation
with great rapidity, contrary to what is requisite for the satisfactory execution
of the work.
This defect is remedied by applying a differential speed to the rotary motion of
the beam.
This result is obtained by means of the mechanism hereinafter described with
reference to the accompanying drawings.
Fig. 1. Side elevation of the mechanism.
Fig. 2. Plan.
Fig. 3. End elevation.
The mechanism is fixed on a suitably arranged cast iron frame.
On one of the ends of the shaft C which carries the beam is fitted a toothed
wheel D from which the axle derives its rotary motion.
This toothed wheel is driven by a bevel wheel fixed on a shaft I, which carries
a friction pulley B, which can move along the shaft I. This friction pulley is
provided with a slot with which a key or feather fixed on the shaft engages,
so that the pulley imparts its rotary movement to the shaft while still free to
slide longitudinally thereon. The rotary motion is transmitted to the friction
pulley B by a disc A. The disc A is fitted on a shaft E carrying two pulleys F F¹
one fast and the other loose, over which the driving belt is intended to pass.
The sliding movement of the friction pulley B along the shaft I is produced
in the following manner;-the "boss" of the pulley B is lengthened by a sleeve
with two collars or shoulders 9 g forming a groove. A bracket or lever H forked
at one end embraces the sleeve between the two collars g g. The other end of the
lever H terminates in an internally screwed socket K traversed by the screw L.
CD

page_text: Two stops J and J¹ serve to determine the extreme limits between which the
pulley B can travel. The screw is worked by hand by the wheel M.
When the winding of the yarn on the beam commences the latter should
revolve at its maximum speed as it is then of the least diameter. By suitably
turning the wheel M the friction pulley B is brought to its maximum distance
from the centre of the disc A, so that the latter communicates to the pulley its
maximum speed and as the beam gradually becomes filled with yarn, the pulley B
can be brought by means of the screw L towards the centre of the disc to decrease
the rotary velocity of the beam. It will be understood that this is necessary
in order to ensure good work, because the beam has increased in diameter as it
got full of yarn; consequently its rotary speed must be diminished in order to
prevent the bobbins in the creel revolving too quickly, which being at the time
empty of yarn have only a small diameter.
By this method I increase the production in two ways, by accelerating the
speed at the commencement and preventing by a reduction of speed the breakages
which are caused either by the bobbin revolving too quickly when getting empty
or the weakness of the material. I can also change from a coarse to a fine count
and from one material to another, by regulating the speed according to the
strength of the yarn.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed (as communicated to
me by my foreign correspondent) I declare that what I claim is
of
The application of a differential speed to all warping frames for the purpose
increasing production, avoiding breakages of yarn, obtaining more regular warps
and perfect winding, and the facility of passing from one material to another,
or from a coarse count of yarn to a finer one.
Dated this 17th day of August 1991.
WM. P. THOMPSON & Co.,
Manchester, Liverpool and London, Patent Agents.