IMPROVEMENTS IN RING-SPINNING MACHINERY
Year: 1883

page_text: 691
PROVISIONAL SPECIFICATION left by Ernest de Pass at the Office of the
Commissioners of Patents on the 29th March 1883. Communicated to him
from abroad by Joseph Imbs, of 17 Boulevard Saint-Martin, Paris, France,
Engineer
ERNEST DE PASS, of 68 Fleet Street, in the City of London, Fellow of the
Institute of Patent Agents, IMPROVEMENTS IN RING-SPINNING MACHINERY,
Communicated to me from abroad by Joseph Imbs, of 17 Boulevard Saint-Martin
Paris, France, Engineer,
In the ordinary system of ring and traveller it is found impracticable to act on
delicate threads and wind them over a small diameter of the bobbin, because in
proportion as the diameter diminishes, the pull of the thread on the traveller occurs
in a direction nearer to the centre of the system. Therefore if this, diameter be
very small, only a small portion of the total pull of the thread acts in the tangential
direction to draw the traveller, and, on the other hand, a very large portion of the
pull of the thread acts in a direction towards the centre, thus tending to press the
traveller against its circular guide and increase the friction and resistance.
Now to remedy this defect the following arrangement has been devised.
The traveller is made in the form of an arm, or lever, or small pallet, and
branching out from the ring bears against the bobbin (or at the commencement of
the operation against the empty spindle) and terminates in an eye, placed some
little distance from the centre of the mechanism so that the pull of the thread acts
on the free end of the arm causing it to bear against the bobbin, or against the
spindle, and serve as a lever to cause the other end of the arm to slide incessantly
round the ring, forming the only point of support which this arm has on the ring.
As it is necessary that this lever or arm shall not escape from the ring, and that,
at the same time, this lever may turn on its point of attachment to the ring for the
purpose of taking up relatively to the centre of the spindle, the different varying
positions depending upon the changing diameters of the bobbin, this arm-shaped
traveller is furnished with a small trunnion, and in the ring is formed a double
groove having a double action, that is, on the one hand it retains the trunnion
whilst allowing it to run freely, and on the other hand, it allows it, with its arm,
to turn on its axis in all the varying horizontal positions.
The double grooved ring with double action may be made in many ways, and
the travelling arm may likewise be varied in several ways.

page_text: In one arrangement, the ring is provided with a vertical groove to receive the
trunnion, and a recess and cover plate form a second groove (horizontal) for the
passage of the travelling arm.
In another arrangement the first mentioned vertical groove is formed in the
upper part of the flat ring itself, and the second groove is formed by a cover plate
fixed thereon.
In another arrangement the vertical groove of the trunnion is formed above and
below in the bottom part and cover respectively; the horizontal groove is formed
by a recess forined between the two parts.
In another arrangement two covering pieces are fixed on a sole plate, and these
three parts form together, first, a wide lower groove retaining the stud of the
trunnion, and secondly, a narrow groove in which the trunnion may travel; the
travelling arm is entirely uncovered.
The horizontal groove may be partly open, and the trunnion groove covered with
a lateral opening for the passage of the arm.
The travelling arm may be made in the form of a fát blade carrying the trunnion,
and provided with the necessary eye, or eyes, or by means of a wire bent in a
suitable manner, or by a sinall forged piece shaped for the purpose.
It is obvious that ring and traveller frames constructed according to this invention
will always comprise a travelling arm with trunnion, and a ring with double groove,
and with a double action enclosing and retaining the trunnion of the traveller and
allowing this overhanging arm to turn on itself.
If the ring be of sufficiently large diameter, for warp bobbins for example-the
travelling arm is provided with a hook very near the trunnion, so that the thread
may pass through this book before reaching the eye at the end of the arm. This
obviates the vertical tension of the thread coming from the cylinders, which tension
or. pull acting on the eye, in such case too far removed, from the trunnion and ring,
would render the working rather more difficult. This does not in any way affect
the particular character of the improved traveller having the form of an arm or
pallet with a trunnion at its base.