Improvements in or Appertaining to the Mechanism for Stopping Power Looms when the Shuttle does not enter the Shuttle Box, commonly called the Stop Rod.
Year: 1887

page_text: Date of Application, 29th June, 1887
Complete Left, 29th Mar., 1888
Complete Accepted, 4th May, 1888
Improvements in or Appertaining to the Mechanism for Stopping
Power Looms when the Shuttle does not enter the Shuttle Box,
commonly called the Stop Rod.
We, JOSEPH HORROCKS, and EDWIN HORROCKS, of Osborne Street, Park Road,
Bradford, in the County of York, Picker Manufacturers, do hereby declare the nature
of this invention to be as follows:-
This invention relates to improvements in or appertaining to the mechanism for
stopping power looms when the shuttle does not enter the shuttle box, commonly
called the stop rod and usually consisting of a stop lever fitted in connection with
each shuttle box and provided with springs so arranged that if the shuttle does not
enter either of the shuttle boxes the lower ends of such levers engage with frogs or
shoulders on the loom frame and thus stop the loom. A swell is employed in com-
bination with each of the said stop levers which projects into the shuttle box and
being acted upon by the shuttle raises the stop levers clear of said frogs. It is obvious
that the pressure of the said swells upon the shuttle will create considerable friction
as such shuttle leaves and enters the box, and the object of our invention is to remove
or reduce such pressure when the pick is being made and thus relieve the strain upon
the picking straps and picking mechanism.
For this purpose a light lever is mounted on a suitable bracket secured to the
cross stay or other convenient part of the loom. The said lever extends forwards from
beneath the tappet shaft to the front of the loom and the front end is attached by
means of a connecting rod, connected in a suitable manner to allow for the motion of
the lay, to an arm projecting from the stop rod passing along the under side of the
lay and connecting the stop levers together. The other end of the said lever is turned
up at right angles at the back of the tappet shaft and supports a horizontal arm
attached thereto by a knuckle joint hereinafter referred to. A disc provided with
two adjustable studs or projections placed diametrically opposite each other is mounted

page_text: on the tappet shaft. And when the loom is in operation the said projections
alternately strike the horizontal arm thereby depressing that end of the lever to which
it is attached and raising the other end of such lever connected to the said arm on
the stop rod consequently such rod is partly rotated and the said swells are withdrawn
from the shuttle boxes. By this means the pressure of the swells is removed and the
shuttle is therefore free both to leave and enter the boxes thus greatly easing the
pick, but to prevent the shuttle rebounding the parts are so relatively arranged that
the pressure of the swells is applied immediately the shuttle has entered the box or
in some cases as it enters the box.
In order to prevent the above described mechanism interfering with the efficient
working of the stop rod the above mentioned arm attached by a knuckle joint to the
lever beneath the tappet shaft is provided so that when the sudden check occasioned
by the loom being stopped causes it to rebound backwards our improved mechanism
is not operated for said arm is in this case adapted to be raised by the projections on
the tappet shaft and they are thus allowed to pass without actuating the said lever or
interfering with the stop rod.
In lieu of the spiral springs commonly employed to hold the stop levers and swells
in position we may employ a flat spring or springs to act upon the arm projecting
from the rod under the lay connecting such levers, and we preferably use a screw in
combination with such spring adapted to adjust the pressure.
Datad this 08th day of June 1887
DRACUP & NOWELL,
Bradford, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in or Appertaining to the Mechanism for Stopping
Power Looms when the Shuttle does not enter the Shuttle Box,
commonly called the Stop Rod.
We, JOSEPH HORROCKS, and EDWIN HORROCKS of Newall Street, Manchester
Road, Bradford, in the County of York, Picker Manufacturers, 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 :-
This invention relates to improvements in the stop rod of power looms, or
mechanism for stopping the loom when the shuttle does not enter or reach the
shuttle box.
The said mechanism usually consists of a stop lever fitted in connection with each
shuttle box and mounted on a rod lying beneath the lathe. Springs are arranged in
connection with the said rod in such a manner that if the shuttle does not reach the
shuttle box the said stop levers engage with frogs or shoulders on the side frames of
the loom and thus stop it. A swell is provided in connection with each of the stop
levers which project into the shuttle boxes and being alternately acted upon by the
shuttle raise the said stop levers clear of the frogs.
It is obvious that the pressure of the said swells upon the shuttle will cause con-
siderable friction as such shuttle leaves the boxes, and the object of this invention is
to reduce such pressure whilst the pick is being made and thus relieve the strain
upon the picking straps and picking mechanism.
To fully describe this invention reference is to be had to the accompanying drawing
forming a part of this specification, in which similar letters of reference indicate
corresponding parts in all the figures.
Figure 1, is a transverse section of a loom representing an inner view of one of the
side frames and the parts necessary to illustrate the application of the said improve-
ments. Figure 2, is a front view and figure 3, is a plan of the same.
A rod A mounted in bearings B lies beneath the shuttle box I and each end is
provided with a stop lever C, one arm of which is kept in contact with the back of
the swell E, pivoted at F and projecting into the shuttle box, by the spiral spring G
stretching between the pin H and the arm J projecting from the rod A. When the
shuttle is in either of the shuttle boxes it acts upon one of the said swells and thrusting
it back enables the tongue K on the levers C fitted in connection with each shuttle
box to clear the frog L projecting from each of the side frames and thus not interfere
with the motion of the lathe N, but in case the shuttle does not reach either of the
shuttle boxes the said swells are not acted upon therefore the tongues K engage with L
and the loom is stopped.
This invention consists in the device or arrangement now described for relieving
the pressure of the said swells upon the shuttle immediately before a pick is made.
For this purpose the spring G is made weaker than usual it being only necessary
for it to be sufficiently strong to enable the swells E to exercise a slight pressure on

page_text: the shuttle when the pick is made to assist in guiding the shuttle, and on one side of
the loom a stout spring X stretches from the frame M to the front end of the lever O.
The lever is mounted on a stud Q fixed to the side frame M, and a loose pawl P is
attached by a knuckle joint to its rear end. And the front end of the lever O is
connected by a chain R to an arm S projecting from the rod A, thus the motion of
the lathe is not interfered with. A finger T projecting from a hanger U secured to
the crank arm or link V comes in contact with the pawl P at each revolution of the
crank shaft W thereby depressing the rear end of the lever O, as shown by the dotted
representation of such lever and arm in figure 1.
The various parts are so relatively arranged that immediately before a pick is made
the lever is depressed in the rear by the finger T and the opposite end raised
thereby stretching the spring X until the chain R is left slack and so removing the
tension of the spring X from the arm S which greatly relieves the pressure of the
swell E upon the shuttle leaving it free in the box with the exception of the pressure
occasioned by the light spring G.
In order to prevent the rebound of the going part, occasioned when the stop rod
mechanism stops the loom, from operating the lever O and damaging the parts or
interfering with the action of the said mechanism the loose pawl P is provided which
enables the finger T to pass the lever when the loom rebounds or it is reversed
without actuating such lever.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare what we
claim is:
1. The combination with the stop rod mechanism of power looms, of mechanism
adapted to relieve the pressure upon the shuttle before a pick is made and at the same
time permit the loom to rebound or be reversed without interfering with the stop
rod mechanism, substantially as herein shown and described.
2. The loose pawl P in combination with the lever O, substantially as herein shown
and described and for the purpose specified.
D
ليمم
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1 1000