AN IMPROVED STOP MOTION FOR PREPARING AND SPINNING MACHINERY
Year: 1885

page_text: I BENJAMIN ALFRED DOBSON, of the firm of Dobson and Barlow, Machine
Makers, of Kay Street Works, Bolton, Lancashire, do hereby declare the nature
of said Invention for AN IMPROVED STOP MOTION FOR PREPARING AND SPINNING
MACHINERY, to be as follows: —
My invention consists of improvements in the stop motions for drawing and
spinning and doubling machinery for cotton, wool, silk, or other fibres.
In draw frames and other similar machines I have for each delivery, or each
head, an oscillating box or plate containing detector needles. This box if of
considerable length may be pivoted at each end and supported at one or inore
intermediate places. Underneath this box I have a revolving or oscillating wiper
shaft on which is a wiper for each set, or for any part of the needles, the wiper
having one or more vanes. In cases where a single broken end or sliver, or thread
necessitates the stoppage of the whole machine as in fly frames, where the building
or copping motion acts upon all the bobbins in the same way simultaneously,
I make my stop motion in convenient lengths as before described and I have at
one or both ends of the length of the boxes containing the needles, an arm or lever,
or can. I have a rod running the full length of the stop motion, applied to the
machine which rod is connected with the ordinary setting on rod motion by a
catch, lever or otherwise. I fix a lever on this rod opposite the arms, levers, or
cams, of the stop motion boxes and there is also a strong spiral spring or a weight
attached in such a manner that when it is liberated, it acts upon the ordinary stop
rod and by the force of the spring or other power pushes the strap fork and strap
on to the loose pulley. I have also at one end of each needle box, or stop
motion box, a cam upon which lies a pivoted lever having a circular or other
shaped disc.
The action in a fly frame, or a spinning frame, or doubling frame or winding
frame, in which the building motion acts upon all the bobbins in the same way and.
at the same time, is as follows:-When an end breaks, the detector needle under'
which it passes falls and coming in contact with the revolving wiper shaft, the
Oscillating box is moved on its pivots. The arm, lever, or cam acts upon the lever
on the longitudinal rod and making the rod turn slightly upon its axis liberates.

page_text: the catch, washer, or other arrangement which retains the rod and allows the
spring or other power to move the strap on to the loose pulley.
As the needle box is being oscillated by the action of the wiper on the needle,
the cam on the end of the box raises up the lever having the disc on its end and
thereby shows directly to the work-person at what portion of the frame the
stoppage or breakage has occurred.
COMPLETE SPECIFICATION.
An Improved Stop Motion for Preparing and Spinning
Machinery.
I BENJAMIN ALFRED DOBSON, of the firm of Dobson and Barlow, Machine
Makers, of Kay Street Works, Bolton, Lancashire, do hereby declare the nature
of said Invention for AN IMPROVED STOP MOTION FOR PREPARING AND SPINNING
MACHINERY, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
My invention consists of improvements in the stop motions for drawing and
spinning and doubling machinery for cotton, wool, silk, or other fibres.
In draw frames and other similar machines, I have for each delivery or each
head, an oscillating box or plate containing detector needles. This box, if of
considerable length may be pivoted at each end and supported at one or more
intermediate places. Underneath this box I have a revolving or oscillating wiper
shaft on which is a wiper for each set, or for any part of the needles, the wiper
having one or more vanes. In cases where a single broken end, or sliver, or thread
necessitates the stoppage of the whole machine as in fly frames where the building
or copping motion acts upon all the bobbins in the same way simultaneously,
I make my stop motion in convenient lengths as before described and I have at
one or both ends of the length of the boxes containing the needles, an arm or lever
or cain. I have a rod running the full length of the stop motion applied to the
machine which rod is connected with the ordinary setting on rod motion by an
arm supporting a catch arrangement or otherwise. I fix a lever on this rod
opposite each of the arms, levers, or cams of the stop motion boxes and there is
also a strong spiral spring or a weight attached to a rod or shaft connected with the
ordinary setting on or stop rod in such a manner that when it is liberated by
the catch arrangement it acts upon the ordinary stop rod and by the force of the

page_text: spring or other power pushes the strap fork and strap on to the loose pulley.
I have also at one end of each needle box or stop motion box, a cam upon which
lies a pivoted lever having a circular or other shaped disc.
The action in a fly frame, or a spinning frame, or doubling frame, or winding
frame in which the building motion acts upon all the bobbins in the same way and
at the same time is as follows:-When an end breaks the detector needle under
which it passes falls, and coming in contact with the revolving wiper shaft, the
oscillating box is moved on its pivots. The arm, lever, or cam acts upon the lever
on the longitudinal rod and making the rod turn slightly upon its axis liberates
the catch, washer, or other arrangement which retains the rod and allows the
spring or other power to move the strap on to the loose pulley. As the needle box
is being oscillated by the action of the wiper on the needle, the cam on the end of
the box raises up the lever having the disc on its end and thereby shows directly
to the workperson at what portion of the frame the stoppage or breakage has
occurred.
And in order that my Invention may be fully understood and readily carried
into effect I will describe the accompanying two Sheet of Drawings, reference being
had to the figures and letters marked thereon.
Fig. 1 is a front elevation and Fig. 2 a side sectional elevation of part of a
drawing or spinning frame to which my improved stop motion is applied and Fig. 3
is a detailed view of part of the improved stop motion.
In these views.-a is the frame of the machine and 6 is one of the needle
boxes or plates which I employ for each delivery or each head of the frame. The
needle box b which carries a detector needle c for each thread is pivoted at each
end at b¹ to a bracket a² on the frame a and is therefore free to oscillate or move
on its pivots. Below the needle box b is mounted in suitable bearings in the
bracket a² the wing or wiper shaft d which is driven by the gears d' d² the chain
wheel and chain d from the chain wheel e¹ fixed upon the drawing roller
shaft e.
On the back of the needle box b is secured the arm f on which rests the
lever g' which is fixed upon the rod g. The rod g is supported and free to turn in
the bracket a² and runs the full length of the stop motion needle boxes applied
to the machine and on this rod is fixed the catch or lever g² (see Figs. 1 and 3).
A vertical lever h is supported adjustably on the lever g2 by means of a screw i
which passes through a projection h¹ on the upper part of the lever h which passes
loosely through the guides or brackets a¹. In the lower part of the lever h are
formed two slots 2 h³ and through the slot passes the ordinary setting on rod j
which is free to be moved endwise in its bearings to actuate the strap fork in the
usual manner and so start or stop the machine as required. Another rod k is fitted
below the setting on rod ; and when the vertical lever h is forced upward in its
guides a¹ by the movement of its supporting lever g' as hereinafter described the
slot his brought opposite to the rod k the end of which when the machine is
working properly rests against the solid part of the lever h. On the rod k is coiled
the spiral spring one end of which bears against the stationary piece m and the
other against a collar n secured on the rod k and lying in contact with a catch
piece o secured on the setting on rod j.
At the end of the needle box b and at each needle box throughout the machine
there is an arm or lever r balanced and at its outer end a disc centred at r¹
which arm or lever is actuated by a projection or finger b³ on the needle box when
a needle c falls and the needle box is moved away.
When a thread breaks the detector needle c under or through which it passes
falls and is instantly struck by the revolving wing or wiper shaft d thereby
moving the needle box b on its pivots and by means of the arm f and lever gl
causing the rod g to turn slightly on its axis. The effect of this movement of the
rod g, is to raise the catch or lever g' and thus raise the vertical rod h bringing
the slot opposite the end of the rod k and allowing the compressed spiral
spring to shoot forward the rod k, the collar n on which engaging with the catch
piece actuates the setting on rod; and so moves the strap fork, shifts the strap

page_text: .
from the fast to the loose pulley and stops the machine or that portion of it
controlled by the setting on rod j.
As the needle box b is moved on its pivots by the action of the wiper shaft d
striking the fallen needle c as described the arm r is moved by the finger b² thus
raising the disc and indicating thereby that section of the machine wherein the
stoppage has occurred,
Fig. 4 illustrates the application of my improved stop motion to one section
of a single drawing frame with three deliveries or heads in each section of the
machine.
In each section of the machine there is a pair of fast and loose pulleys e³ es on
each section of the drawing roller shaft e which is driven by means of a strap 8
and a fast pulley t fixed on the driving shaft u which runs the full length of the
machine and is driven by means of the pulley v. The wiper shaft & has a wheel do
fixed upon it and is driven by means of a chain or strap d' from a wheel a¹ on the
drawing roller shaft e. The remaining parts in this arrangement are substantially
the same as those described with reference to Figs. 1 to 3.
When a detector needle c falls and a slot in the vertical rod h comes opposite the
the end of the rod k as previously described the spiral spring shoots forward
the rod and with it the strap fork guide; thereby shifting the strap s from the
fast pulley e to the loose pulley e³ and stopping that section of the machine in
which the breakage or failure occurred.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
1. The construction, arrangement, and combination of parts constituting my
improved stop motion for preparing and spinning machinery, substantially as and
for the purposes herein described and as illustrated by the Drawings annexed.
2. In drawing frames and other analogous machines, the combination with a
revolving or oscillating wing or wiper shaft and a pivoted needle box or plate,
carrying detector needles, of a rod in contact or communication with the said
needle box and connected by suitable mechanism to the setting on rod or other
part controlling the driving mechanism.
3. The combination with the setting on rod j, or other part controlling the
driving mechanism of a drawing frame or other analogous machine, of the rod k,
spring, or its equivalent, and means for connecting the same to a needle box stop
motion substantially as herein set forth for the purposes specified.
4. The use and application of the pivoted arm or lever r provided with a
disc or other device in combination with a needle box stop motion substantially
in the manner and for the purposes described and as illustrated by the accompanying
Drawings.