An Improved Picking Motion for Looms.
Year: 1889

page_text: Date of Application, 14th Sept., 1889
Complete Specification Left, 14th June, 1890-Accepted, 19th July, 1890
PROVISIONAL SPECIFICATION.
An Improved Picking Motion for Looms.
Wo JOSEPH THOMPSON of Bank Villa, Gentleman, and BENJAMIN THOMPSON of
Syke Mill, Manufacturer, both of Haslingden in the County of Lancaster do hereby
declare the nature of this invention to be as follows :-
The object of this invention is to dispense with the picking shafts, picking sticks,
pickers, picking bands and other ordinary appliances and to substitute therefor an
improved picking motion, which will be more economical and at the same time more
certain in its action.
The principal feature of our invention consists in the employment of a revolving
gment which projects inwards through a slot in the back board of the shuttle-box
and acts as the propelling instrument to drive the shuttle across the shed from one
shuttle-box to the other.
The segment is covered with india-rubber or other suitable substance to give it a
firm grip against the side of the shuttle, and it is mounted upon a vertical shaft, which
is carried by and oscillates with the lathe.
The boss of a wheel which is loose on the segment shaft as provided with a tooth or
driver and on the shaft is secured by an adjusting screw a second boss, which is
provided with a projection against which the tooth or driver aforesaid acts.
A continuous revolving motion is given to the wheel by means of an endless chain
from the crank shaft, or otherwise, and this motion will be imparted to the quadrant
which will be carried round with it. The shaft is provided with a crank to which a
spring is connected, and as soon as the crank has passed its centro line, the spring will
come into action, causing the shaft and quadrant to make a sudden forward circular
movement, running away from the driver; and it is at this time that the quadrant
acts against the shuttle so as to give it a sudden and rapid impulse to drive it across.
the shed.
In the front of the shuttle-box we make a slot in which we fit a hollow frame
pivotted at one end, and carrying two or more bowls or rollers which act against
the front of the shuttle and serve as guides to direct its flight.
This frame is provided with a strong spring and acts in a similar manner to the
"swell" in an ordinary shuttle box, to check and hold the shuttle as it enters the
box.
It is relieved by the action of the quadrant at the time that the shuttle receives
the impulse.
We would here remark that although we have described the propelling quadrant as
5 passing through the back of the shuttle-box and acting against the side of the shuttle,
wo do not wish to limit ourselves to this arrangement, as the same may be placed
above or below or both above or below or at the front, and act against the top or
bottom or both top and bottom or front of the shuttle, but for many reasons we consider
the first described arrangement preferable.
Dated this 13th day of September 1889.

page_text: .
COMPLETE SPECIFICATION.
An Improved Pioking Motion for Looms.
Wе JOSEPH THOMPSON late of Bank Villa, and now of East Bank Manchester Road
Gentleman, and BENJAMIN THOMPSON of Syke Mill, Manufacturer, both of Haslingden
in the County of Lancaster 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 object of this invention is to dispense with the picking shafts, picking sticks,
pickers, picking hands, and other ordinary appliances and to substitute therefor an
improved picking motion which will be more economical and at the same time more
certain in its action.
The nature of our said invention and the manner in which the same is to be per-
formed 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 annexed drawings is a plan view of the shuttle box of a power loom
showing the application of our invention thereto, and Fig. 2 is a vertical section of
the same on a smaller scale showing the mechanism for driving the same.
a is the shuttle box, b the shuttle race, and c the slay sword. The principal feature
of our invention consists in the employment of a revolving segment or wheel d which
projects inwards through a slot in the back of the shuttle box, and acts as the pro-
pelling instrument to drive the shuttle e across the "shed" from one shuttlo box to the
other.
The segment is covered with india rubber or other suitable substance d¹ to give it a
firm grip against the side of the shuttle e and is so mounted at the upper end of
a vertical shaft g which is carried by, and oscillates with the slay sword c.
Near the bottom end of this shaft g is fixed a disc h provided with a tooth or
driver; and fitted loosely on the bottom end of the said shaft is a boss k provided
with a pin or projection which acts against the said tooth or driver i.
The boss kis provided with a toothed wheel m in gear with a toothed wheel n
(having half the number of teeth) keyed on a diagonal shaft o which is driven
continuously by mitre wheels from the crank shaft.
The face of the toothed wheel m is slightly curved to allow of the slight oscillation
of the lower end of the slay sword.
Instead of the toothed wheels m and n the boss k may be driven by an endless
chain and stud wheels and it may be actuated if preferred from the tappet shaft of the
loon, so that a continuous revolving motion is given to the quadrant shaft g.
This shaft is provided with a crank at g' to which a spring p is connected and as
soon as the crank g' has passed its centre line the spring p will come into action
causing the shaft g and quadrant or segment d to make a sudden forward circular
movement running away from the driving pin l; and it is at this time that the quadrant
or seginent d acts against the shuttle e so as to give it a sudden and rapid impulse to
drive it across the shed.
In front of the shuttle box (see Fig. 1.) we make a slot or recess a¹ in which we fit
a bowl
which acts against the front of the shuttle e so as to resist the pressure of the
segment d and at the back of the shuttle box we have a piece r which acts in a similar
manner to the "swell" in an ordinary shuttle box. This piece r is bolted to one end
of a lever s through a boss, in the centre of which passes the upper end of the quadran
shaft g so that whenever the india rubber strip d' commences to act against the shuttle i
causes the lever s to withdraw the swell piece from the shuttle so as to release the
same, but as soon as the other end of the strip passes free of the shuttle and the latter
commences to traverse, it allows the spring t to throw the swell piece r forward ready
to receive and hold the shuttle on its return.
Instead of this arrangement we may mount two or more bowls on a hollow frame o
lever pivotted at one end, being provided with a strong spring and passing through
a slot in the front of the shuttle box as mentioned in our Provisional Specification.
i

page_text: We would here remark that although we have described the propelling quadrant or
segment as passing through the back of the shuttle box and acting against the side
of the shuttlo, we do not wish to limit ourselves to this arrangement as the same
may be placed above or below, or both above and below, or at the front, and
may act against the top or bottom, or both top and bottom or front of the shuttle.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what mannor the same is to be performed we declaro that what we
claim is :-
The improved picking motion for looms wherein the impulse is given to the shuttle
by means of a quadrant or segment which bears against the shuttle, and to which an
accelerated forward circular motion is imparted at the moment that the shuttlo is
required to be driven across the shel, substantially in the manner herein-before
described and illustrated by the drawings annexed.
Datoil the 12th dov of June 1800
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicants.