An Improved Stop Motion for Doubling Frames.
Year: 1887

page_text: Date of Application, 26th Oct., 1887
Complete Specification Left, 25th July, 1888
Complete Specification Accepted, 31st Aug., 1888
PROVISIONAL SPECIFICATION.
An Improved Stop Motion for Doubling Frames.
I GEORGE ASHWORTH of 92 Bold Street, Moss Side, Manchester in the County of
Lancaster, Mechanic, do hereby declare the nature of this invention to be as
follows:
"
This invention relates to doubling frames (either on the ring and traveller or the
flyer principle) and especially to that class of stop motion for such frames wherein
the breakage or absence of the thread or "end causes the automatic lifting of the
top delivery roller off the lower or driving roller and consequently stops the delivery
of the yarn.
According to my invention I provide at each end of each top delivery roller a thin
metal disc or cam of a snail form, the two discs being connected together either by
a spindle passing through the centre of the roller or by a bar across the back of the
same, and being capable of revolving independently of the roller or of remaining still
whilst the roller revolves.
The smallest diameter of the discs is less than that of the top roller so that when
that portion of the discs is downwards the discs will not touch the bottom or driving
roller. The diameter of the discs however gradually increases in the form of a
snail," and the discs are weighted so as to have a tendency to bring this part into
contact with the bottom roller.
A wire extends from one disc to the other and the tension of the thread or end
passing from the "nip" of the rollers over this wire keeps the weight raised and the
discs out of contact with the bottom or driving roller.
As soon however as a thread or end breaks this wire is released and the weights
bring the larger part of the discs into contact with the bottom roller.
The discs then commence to revolve, and their increasing diameter causes the top
roller to be lifted until its axle is above the top of the cap which carries them and
thus stops the delivery of the yarn, and at this time a tappet or pin on the side of the
disc pushes the axle of the roller backwards into the notch provided for the purpose
so as to leave all in readiness for piecing-up.
Thi 5th of Ontahan 1007
GEORGE DAVIES,
.4, St. Ann's Square, Manchester,
Agent for the Applicant.

page_text: I GEORGE ASHWORTH of 92 Bold Street Moss Side Manchester in the County of
Lancaster Mechanic 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 :-
53
This invention relates to doubling frames (either on the "ring and traveller
or the
flyer principle) for doubling cotton and other fibrous substances and especially to that
class of stop motion for such frames wherein the breakage or absence of the thread or
"end" causes the automatic lifting of the top delivery roller off the bottom or driving
roller and consequently stops the delivery of the yarn.
The nature of my said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference to
the sheet of drawings hereunto annexed and the following explanation thereof.
Fig. 1. on the drawings is a section of a pair of delivery rollers with my invention
shown as applied thereto, as I propose to apply it in making new frames, the apparatus
being drawn in its working position or when the thread or "end" is unbroken, the
section being taken through about the line X, X in Fig. 3.
Fig,
2 is a similar view shewing the position assumed by the apparatus when the
"end" is broken or absent and the top roller is raised, the section being taken through
about the line Y, Y on Fig. 3.
Fig. 3 is a plan view of Fig. 1.
Fig. 4 is a section and Fig. 5 a plan view showing a modification of the above
adapted for application to doubling frames at present in existence, without any
alteration in the frame itself.
In all these Figs. a is the top delivery roller, & the bottom delivery or driving
roller, c part of the cap bar and the cap which holds the top roller in its place.
According to my invention (with reference to Figs. 1. 2 and 3) I provide at each
end of each top delivery roller a a thin metal disc or cam g of a snail or scroll form,
the two discs being connected together, either by a spindle or tube passing through
the contre of the roller, or by a bar across the back of the same, and being capable
of revolving independently of the roller, or of remaining still whilst the roller
revolves.
The smallest diameter of the discs or cams g is less than that of the top roller a.
and a notch may be cut out as shown, so that when that portion of the discs is down-
wards the discs will not touch the bottom or driving roller (see Fig. 1).
The diameter of the discs however gradually increases in the form of a snail or
scroll, as shown, and the discs g are weighted or made heavier at the back (see Fig. 3)
so as to have a tendency to bring this part into contact with the bottom or driving
roller b.
A wire or a guide i is attached, to one of them, and the tension of the thread or
"end" passing from the "nip" of the rollers over this wire or guide keeps the
heavier part of the discs raised and the discs or cams g out of contact with the
bottom or driving roller b as drawn in full lines on Fig. 2.

page_text: As soon however as a thread or end breaks this wire or guide i is released and
the weight of the back part of the discs or cams brings the larger part of the
same into contact with the bottom roller b as shown by the dotted lines in Fig. 1.
The discs then commence to revolvo (being driven by the roller b) and their
increasing diameter causes the top roller à to be lifted out of contact with the
bottom roller (as shown in full lines at Fig. 2) and thus stops the delivery of
the yarn.
As soon as the axle has risen above the top of the cap fa tappet 1 (or a pin)
on the side of the disc g acting against the front of the cap pushes the axle of
tho rollor backwards into the notch in the top of the cap f provided for that purpose
so as to have all in readiness for "piecing-up" as shown in dotted line at Fig. 2.
When I wish to apply my invention to a doubling frame already in existence
without filing away any portion of the side of the cap or otherwise altering the
machine I mount the two discs or cams and their connecting pin or bar h in a
light frame m (see Figs. 4 and 5) which is fixed on the cap bar e.
The connecting bar h serves as the weight, and the plate ¹ serves as a guide
over which the thread or end passes and holds it in the position drawn in full
lines on Fig. 4, a catch o preventing the discs from turning over in the wrong
direction so as to bring the point gx of the discs into contact with the roller b in the
same way that the flat part of the tappet 7 acts (see Fig. 1).
As soon as an end breaks the discs or snails g come into contact with the bottom
roller as in the preceding case and raise the top roller a by means of the projections m*
from the frame m, which projections are beneath the axles of the top roller a.
As the front end of the frame m rises it draws the back end thereof forwards and
allows a small catch p to fall down in front of the cap bar e and thus keep the
frame m and the roller a in their elevated position as shown by the dotted lines in
Fig. 4.
When the "end" has been pieced up the top roller a is brought down into action
again by the attendant withdrawing the catch P.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what
I claim is
The improved "stop-motion" for doubling frames substantially as hereinbefore
described and illustrated by the drawings annexed, and especially I claim the use in
such "stop-motions" of the scroll or snail shaped discs or cams g for lifting the top
roller, whether the same be mounted on the axis of the top roller or on a frame or
bracket carried by the cap bar; such discs or cams being held out of contact with
the bottom roller by the tension of the "end or thread, and being so weighted that
(upon the breakage or absence of the latter) they will fall automatically into contact
therewith, and thus stop the delivery.
Doted this 24th day of July 1888
"
.
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicant.