Improvements in the Construction of Stop Motions of Weaving Looms.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Construction of Stop Motions of Weaving Looms.
We, JOHN CHARLES COTTAM, of Bank Street Chambers, Bank Street, in the
City of Bradford, Accountant, and JOSEPHI BENTLEY, of 17, Park Road, Windhill,
Shipley, in the County of York, Mill Furnisher, do hereby declare the nature of
this invention to be as follows:-
The object of this invention is to arrange what are commonly known as stop
rod motions of looms for weaving, in such a manner that, the said motion is of
a positive character and so arranged that, the friction between the shuttle and
swell of the shuttle box is reduced, and thereby to proportionately reduce the
wear and tear of the cams, picking sticks, straps, and pickers of the loom.
This is accomplished by mounting in each shuttle box an arm on which is
formed a swell, the arm is fulcrumed on a pin, and is of such width as to
project on one side into the shuttle box, and on the opposite side to extend a
distance beyond the back of the lathe. One end of the fulcrumed arm is con-
tinued at the back of the lathe some distance beyond the fulcrum pin, and is
moved by the shuttle on entering the box, into such position that, the stop
fingers are held clear of the stop blocks when a shuttle occupies the shuttle box
at either end of the loom.
Mounted to the lathe is a rod provided with the before mentioned stop fingers,
and to the said rod are secured arms projecting upwards, in such position, as to
come in contact with that portion of the fulcrumed arm projecting beyond the
fulcrum pin, whenever there is a shuttle in the box at the end of the lathe.
The swell is held back as long as the arms are in contact, thus removing the
frictional binding of the shuttle in the box; but should the shuttle fail, when
driven across the loom, to reach the opposite box, then the arm at the opposite
end of the box is not held back, so that the stop fingers are allowed to come
into contact with the stop blocks.
On the before mentioned rod is also mounted an arm which whenever there
is a shuttle in the box at either end of the lathe, the said arm comes in contact
with a lever mounted upon a fulcrum pin, and connected to the said lever is a
bar upon which is placed a spiral spring for more readily bringing the stop
fingers into position for stopping the loom, when the shuttle fails to reach the
opposite box.
By removing the friction between the swell and shuttle, the power required
to propel the shuttle across the loom from box to box is reduced, therefore the
wear and tear of the cams and other parts of the picking motion are reduced in a
corresponding degree.

page_text: Improvements in the Construction of Stop Motions of Weaving Looms.
We, JOHN CHARLES COTTAM, of Bank Street Chambers, Bank Street, in the
City of Bradford, Accountant, and JOSEPII BENTLEY, of 17, Park Road, Windhill,
Shipley, in the County of York, Mill Furnisher, 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 has for its object, certain improvements whereby the friction
on the shuttle between the fixed flange at the front of the shuttle box, and the
"swell" at the back or opposite side of the shuttle box is reduced at the time
when the shuttle is in the position to be driven from one shuttle box to another, and
thereby to proportionately reduce the wear and tear of the cams, picking sticks,
straps and pickers of the loom, utilized for operating the shuttle.
In describing our invention in detail, reference is made to the accompanying
sheets of drawings in which, Fig. 1 represents the front elevation of such portions
of a weaving loom as are required to explain our invention, which is more par-
ticularly shown in the detached details hereinafter explained, those parts of the
loom not required for explaining our invention are of the ordinary and well
known construction, and are omitted from the drawings.
Fig. 2 represents the end elevation of a loom with the stop fingers held clear
of the stop blocks.
Fig. 3 is a section through the loom on line a, b, of Fig. 1, with the stop rod
fingers in contact with the stop blocks; the remainder of the figures are detached
details drawn to an enlarged scale.
Fig. 4 a detached detail view showing the application of a plate or flat spring
for forcing the stop rod fingers into the position shown.
Fig. 5 is an end view of the lay beam with the stop rod fingers held clear
of the stop blocks.
Fig. 6 is a back view of one end of the lay beam.
Fig. 7a plan of one end of the lay beam and,
Fig. 8 a section through the stop rod shaft with hooked arm and a portion of
the spiral spring on the opposite side of the stop rod shaft to that of the stop
rod fingers.
Fig. 9 is an end view showing the stop rod shaft with hooked arm and a
portion of the spiral spring on the same side of the shaft as the stop rod
fingers.
The remaining figures are detached details showing how the reduction of the
friction on the shuttle as it is being driven from one shuttle box to another,
may be carried into effect by modified mechanism of the same nature as that
shown and described in connection with the above mentioned views and are
hereinafter referred to.
In carrying out our invention. the vertical picking shafts A, picking sticks B,
lay beam C and other parts of the loom not particularly mentioned in the follow-
ing description are of the ordinary construction and operated in the usual
manner.
A shuttle box 1) is formed at each end of the lay beam C as usual, and at
the back of each shuttle box D), is a bar E fulcrumed on a pin at E¹, one side
of the said bar projects a short distance into the interior of the shuttle box D),
and there forms a "swell
at E2, the fulcrumed bar E may extend on the back of
the lay beam C and terminate with an arm at E³.
To the underside of the lay beam C is mounted a shaft G as usual, commonly

page_text: called a "stop rod," and to this shaft are secured arms H terminating vertically,
one arm near to each end of the said shaft, and on the said shaft are formed stop
fingers J as usual, which are held in the position shown by Figs. 2 and 5, that is,
raised clear of the stop blocks J¹, by the contraction of the spiral spring K, held
in tension between an hooked arm G' projecting from shaft G, and an extension G³
secured to one of the oscillating arms C¹ supporting the lay beam C.
On the lay beam C moving towards the front of the loom in the direction of
the arrow in Fig. 2 for beating up the weft, a short arm L secured to and
projecting from shaft G, comes in contact with one end of a lever L-shown
by Figs. 3 and 4, and unless the shaft G is held stationary in the manner as
hereinafter described during the beat up of the weft, the action of the spiral
spring S, or flat plate spring S₁ applied in the manner shown, will cause the
shaft G to slightly rotate in its journals and the stop fingers J to descend from
the position shown by Figs. 2 and 5, to that shown by Figs. 3 and 4, and thereby
stop the loom by the stop fingers J coming in contact with the stop blocks J,
but when there is a shuttle in either shuttle box, the stop fingers J are held
clear of the stop blocks J', as shown by Figs. 2 and 5, and the friction removed
from the shuttle box D) in the following manner.
Each shuttle box D) is provided with an ordinary picker which slides on rod M,
and is operated in the usual manner, and when a shuttle is driven home into a
shuttle box D, at either end of the lay beam C, it is compressed between the
swell" E2 on one side of the shuttle box, and the fixed flange D1 on the
opposite side of the shuttle box, thus moving the bar E backwards to the position
shown by dotted lines in Fig. 7, the arm 3 attached thereto being also moved
to the position shown by dotted lines, thus propping the arms H and thereby
retaining the arms H and shaft G in a stationary position, so that on the lay
beam C moving forward in the direction of arrow in Fig. 2, the short arm L
on coming in contact with the lever L¹, cannot operate the lever and shaft G
in the manner as herein before described, consequently the said shaft and stop
fingers are held in the position as shown by Figs. 2 and 5, by the end of
arm engaging with the vertical arm H in a manner so as to act as a prop
to the vertical arm H, and thereby prevent any movement of the shaft G, in
the direction for the stop fingers J, to engage with the stop blocks J, and by
the arm E propping the vertical arm H in the manner described, the pressure
of the spiral spring S Fig. 3, or flat plate spring S¹ Fig. 4, acting through
the short arm L and vertical arm H against the end of arm E, forces the ful-
crumed bar E backwards a distance that the "swell" E is clear of the shuttle
within the shuttle box D, thereby removing from the shuttle, the friction hitherto
binding it within the shuttle box D as is the case when the vertical arm H acts
direct upon the fulcrumed bar E in the manner as hitherto; thus by our com-
bination and arrangement of mechanism, the power required to propel the shuttle
across the loom from one shuttle box to the other is considerably reduced, con-
sequently reducing in a proportionate degree the wear and tear of the picking
mechanism.
Fig. 9 is an end view of the stop rod shaft with the hooked arm and a portion
of the spiral spring on the same side of the stop rod shaft as the stop rod fingers.
When the hooked arm G¹ is on the same side of the stop rod shaft G as the
fingers J, the said fingers are held in the position shown by Figs. 2, 5 and 9,
during some portion of the reciprocating movement of the lay beam C, by the
small pulley G2 on end of lever G³ secured to stop rod shaft Ġ, by passing over
the upper surface of the bracket G secured to some convenient part of the loom,
such as to one of the end frames.
The lay beam C on moving in the direction of arrows in Figs. 2 and 9, when
near the termination of the forward motion for beating up the weft, the before
mentioned small pulley G2 will leave the upper surface of bracket G, and if the
vertical arms H are not held back in the manner as before described, the spiral

page_text: .
spring K is at liberty to contract, and bring the fingers J into the position shown
by Figs. 3 and 4 and thereby stop the loom on coming in contact with the stop
blocks J; but if the arms H are propped or held back, the stop fingers J are
held clear of the stop blocks J₁ as shown by Figs. 2 and 5.
Fig. 10 represents a back view and Fig. 11 a plan of one end of the lay
beam C, showing a vertical arm H constructed in a modified manner, by which
the upper portion of said arm at H¹ is pivotted at H2, and held in the position
shown by spring S2. The modified arm is attached to the shaft G and operated
in the manner as before described, but should the shuttle be only partly driven
into the shuttle box D, so that the bar E is not moved back the required
distance for the arm E³ to properly engage with and prop the said vertical arm,
but only with the edge thereof, the upper portion of the arm at H' will yield in
the direction of the curved arrow, thus allowing the arm E³ to pass and not hold
or prop back the arm H, and the stop fingers J to come in contact with the stop
blocks J and stop the loom in the manner as herein before described; but should
the arm E hold back or prop the vertical arm at H', then the stop fingers Jare
held up clear of the stop blocks J¹, and the binding of the shuttle within the
shuttle box D removed.
Figs. 12 and 13 represent a back elevation and plan of one end of the lay
beam C, in this case, instead of the fulcrumed bar E being continued and
terminating with an arm E as before described we utilize a bar E of the
ordinary description, and apply a short lever N fulcrumed on a pin E¹. The
application of this lever as will be readily understood, is the same in effect as
the mechanism before described. On the fulcrumed bar E being moved back-
wards by the shuttle entering the shuttle box D, the short lever N is operated
in the direction that, one end of the said lever is in the position for holding
back or propping the vertical arm at H', and thereby removing the frictional
binding of the shuttle within the shuttle box D, also preventing the stop fingers J
coming in contact with the stop blocks J¹.
Figs. 14 and 15 are similar views to those last described, showing a back
elevation and plan of one end of the lay beam, and Fig. 16 is a side elevation of
our modified arm.
According to this arrangement, we move the vertical arms H further from
the ends of the lay beam C, and mount a lever P on a stud supported by
bracket PI secured to the lav beam C: one end of this lever P engages with
the back of fulcrumed bar E, the said lever has a projecting arm P2 which
as will be readily understood, when the fulcrumed har E is forced backwards by
the shuttle entering into the shuttle box D, the end of lever P in contact with
the fulcrumed bar E, is also forced backwards, and the arm P2 of lever P, moved
into position for engaging with the upper portion H of vertical arm H, and
thus hold or prop the same in the manner as before described, so that the fric-
tional binding of the shuttle within the shuttle box is removed, and the stop
fingers J prevented from coming in contact with the stop block J¹ and thereby
stopping the loom.
Figs. 17 and 18 represent a back elevation and plan of one end of the lay
beam C, according to this arrangement, the bar E is fulcrumed at E1, the opposite
end of the said bar is enlarged at Q, through this enlargement is bored a hole
for the reception of an arm Q, of lever R', fulcrumed by a pin R2 to bracket R
secured to the lay beam C. It will be seen that on the shuttle being driven
into the shuttle box D, the action on the stop rod fingers and shuttle is the
same as before described, that is to say, on the shuttle coming in contact with the
swell E, it is forced backwards, thus operating the lever R₁ in the direction
that the end of lever arm at R4 is moved into position for holding or propping
back the arm at H', and thereby removing the frictional binding from the
shuttle within the shuttle box D, also preventing the stop fingers J coming in
contact with the stop blocks J' in the manner as hereinbefore described.

page_text: .
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is:-
1. The fulcrumed bar E combined with shaft G by intermediary arms or levers,
and with the arms or levers L and L' or G³ and with bracket G stop fingers J,
stop blocks J and springs, all arranged substantially in the manner as shown
and described and for the purpose as hereinbefore set forth.
2. Mechanism by which pressure is automatically removed from the shuttle
within the shuttle box, such mechanism also keeping the stop fingers J clear of
the stop blocks J¹ when the shuttle is within one of the shuttle boxes, all arranged
substantially in the manner as shown and described and for the purpose as
herein before set forth.
11
0711 1
T
1000
JOHN WAUGH,
Agent for Applicants.