AN IMPROVED STOP MOTION FOR MACHINES USED FOR DOUBLING COTTON AND OTHER FIBROUS SUBSTANCES to be as follows
Year: 1885

page_text: Cotton and other Fibrous Substances.
I JAMES HOLROYD of 2 Harrison Street Ancoats Manchester in the County of
Lancaster Mill Manager do hereby declare the nature of my invention for "AN
IMPROVED STOP MOTION FOR MACHINES USED FOR DOUBLING COTTON AND OTHER
FIBROUS SUBSTANCES to be as follows:-
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This invention is designed to prevent the waste of fibrous material (commonly
called "roller laps") arising from the accumulation of such material upon the
delivery rollers of doubling frames when the "ends" break or the thread or twist
becomes slack.
The invention relates to that class of stop motions for such machines wherein a
series of small balanced levers are employed, the lower or heavier end of the lever
being supported by the thread, and the lighter or upper end carrying a swing plate
or wedge which when the "end" breaks or becomes slack is thrust forward by the
falling of the balanced lever and coming between the delivery rollers raises the top
roller off the bottom or driving roller and thus stops the delivery of the yarn or
fibrous material.
My invention consists of an improved mode of constructing and mounting such
balanced levers whereby their efficiency is increased, the access of fluff or dust to
their bearings is prevented, and means are afforded for removing any one or more
of such levers without disturbing the rest.
The balanced levers are made of wire. in the form of a bell crank. The lower
arm of the lever projects forward below the bottom roller and its forward end is
bent at right angles and then slightly hooked backwards so as to form a kind of
guide for the thread or end which supports it.
The central portion is coiled into two or more turns and embraces tightly the
centre of a short piece of wire at right angles to itself which forms two pivots upon
which the balanced lever is supported.
The other arm of the lever extends backwards and is bent upwards behind the
cap bar which supports the top delivering roller, and its upper end is bent at right
angles horizontally and carries a swing plate or wedge, the forward end of which
rests upon the bottom delivery roller just behind the "nip" of the two rollers,

page_text: The cross wires or pivots of the balanced levers are supported beneath the cap
bar in the following manner. To the front of the cap bar I solder a series of thin
metal plates (one beneath each cap) having spaces between them of a width to
admit of the coiled central part of the balanced lever.
Each plate extends downwards as far as required and is then doubled upwards
so as to form a loop or support for the cross wires or pivots of the balanced levers
to rest in.
The free end of the plate does not reach up to the lower side of the cap bar but
a space is left between the two sufficient to let the cross wire pass in or out and by
these means each or any of the balanced levers can be removed and replaced
without disturbing any of the others.
I would here remark that instead of the plates, wires may be used bent in the
form of a book to support the pivots of the balanced levers, but I prefer the
doubled plates as they prevent the access of dust or fluff to the pivots.

page_text: An Improved Stop Motion for Machines Used for Doubling
Cotton and other Fibrous Substances.
I JAMES HOLROYD of 2 Harrison Street Ancoats Manchester in the County of
Lancaster Mill Manager do hereby declare the nature of my invention for AN
IMPROVED STOP MOTION FOR MACHINES USED FOR DOUBLING COTTON AND OTHER
FIBROUS SUBSTANCES and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
This invention is designed to prevent the waste of fibrous material (commonly
called "roller laps") arising from the accumulation of such material upon the
delivery rollers of doubling frames when the "ends" break or the thread or twist
becomes Black; it also prevents the occurrence of the defect known as "four fold."
The invention relates to that class of stop motions for such machines wherein a
series of small balanced levers are employed, the lower or heavier end of the lever
being supported by the thread and the lighter or upper end carrying a swing-plate
or wedge which when the end breaks or becomes slack, is thrust forwards by the
falling of the lower end of the balanced lever and coming between the delivery
rollers, raises the top roller off the bottom or driving roller, and thus stops the
delivery of the yarn or thread of fibrous material.
The nature of my invention and the manner in which it is practically applied
will be readily understood on reference to the annexed sheet of drawings and the
following explanation thereof.
Fig. 1 on the drawings is a section of the roller beam and delivery rollers and
cap bar of a doubling frame showing the application of my improved stop motion
thereto, the balanced lever being shown as supported by the yarn or thread in the
position which it would occupy when the machine is in work, and Fig. 2 is a.
similar view showing the position which it assumes when an end or thread breaks
or becomes slack. Fig. 3 is a back view of the cap bar. Figs. 4 and 5 are
enlarged views of one of my improved balance levers shown detached.
a. a is the roller beam of a doubling frame b b one of the roller stands c. c¹ two
of the delivery rollers (the lower roller c¹ being the driver) d d is the cap bar,
and dd the cap, e. el are the balanced levers.
My invention consists of an improved mode of constructing and mounting such
balanced levers whereby their efficiency is increased, the access of fluff or dust to
their bearings is prevented, and means are afforded for removing any one or more
of such levers without disturbing the rest.
The balanced levers are made of wire in the form of a bell crank. The lower
arm el of the lever projects below the bottom roller c¹ and its forward end is bent
at right angles and then slightly hooked backwards so as to form a kind of guide f
for the thread or end which supports it.
The lower arm of the balanced lever is also made with an open ring or bend e¹¹
to increase its weight and this ring is made either larger or smaller to suit the
strength or "count" of the yarn for doubling which the frame is to be employed.
The central portion of the wire is coiled into two or more turns at g. g. and
embraces tightly the centre of a short piece h. h. of wire at right angles to itself

page_text: (see Figs. 4 and 5) which forms two pivots upon which the balanced lever is
supported.
These coils are preferably also further secured to the pin h. h. by means of
solder.
The upper arm e of the lever extends backwards and is bent upwards behind
the cap bar dd which supports the top delivery roller c and its upper end is bent
at right angles horizontally and carries the swing-plate or wedge i. i, the forward
end of which (when the frame is in action) rests upon the top of the cap bar d. d.
just behind the two rollers as shown at Fig. 1.
The cross wires or pivots h. h of the balanced levers 6. e¹ are supported beneath
the cap bar d. d. in the following manner.
To the front of the cap bar d. d. I solder or otherwise fix a series of thin metal
plates k. k. (one beneath each cap d¹ d¹) having spaces . . between them (see
Fig. 3) of a sufficient width to admit of the coiled central part g. g of the balanced
lever.
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Each plate k. k extends downwards as far as required and is then doubled upwards
(see Figs. 1 and 2) so as to form a loop or support for the cross wires or pivots h. h.
of the balanced levers to rest in. The free end of the plate k. does not reach up
to the lower side of the cap bar d. d. but a space m. m. is left between the two
sufficient to let the cross wire h h pass in or out; and by these means each or any
of the balanced levers can be removed and replaced without disturbing any of the
others, and when they are in their places the plates k, k, will effectually protect
their cross wires or pivots from dust or fluff.
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:-
First. In stop motions of the "balanced lever" class as applied to doubling
frames the peculiar form or construction of lever herein before described and shewn
on the drawing having in the centre a double or other coil g. g. embracing a short
wire h. h so as to form two pivots at right angles to itself.
Secondly. I claim as applied to the lower arm of a balanced lever of a stop motion
of this class, an open ring or bend (formed from the same piece of wire) for the
purpose of giving the said lower arm additional weight without increasing the
length of the lever for the purpose described.
Thirdly. I claim the combination with the balanced levers with pivots at right
angles as aforesaid of the doubled plates k. k. soldered or otherwise fixed to the cap
bar, and having their free ends terminating a short distance beneath the same, so
as to form supports for the said pivots and protect the same from fluff and dust,
and at the same time allow of each or any of the balanced levers being removed
and replaced without disturbing any of the rollers.
Dated this 22nd day of April 1886.
GEORGE DAVIES.
Agent for the Applicant.