IMPROVEMENTS IN APPARATUS FOR STOPPING LOOMS BEFORE THE WEFT IS FINISHED ON THE BOBBIN
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I FRANCIS WILLIAMSON of Griffe Mill near Haworth in the County of York;
Spinner and Manufacturer, do hereby declare the nature of my Invention for
IMPROVEMENTS IN APPARATUS FOR STOPPING LOOMS BEFORE THE WEFT IS
FINISHED ON THE BOBBIN, to be as follows:-
This Invention relates to certain improvements in looms for weaving and has for
its object the stopping of the loom mechanically before the weft is all woven from
off the bobbin or tube in the shuttle in order to obviate what are termed broken
picks by which the fabric is greatly deteriorated in value.
'
I accomplish my object by fixing to the framework of the loom a card cylinder
to which motion is communicated from one of the main shafts of the loom. Around
the cylinder are placed a number of card plates regulated by the number of yards
of yarn on the bobbin or tube. Above the card plates is mounted a reciprocating
arin which is raised whilst the cards are being turned, and on the arm lowering a
pin secured thereto rests upon the card plate at the top.
One of the said plates has a hole through and when this plate arrives at the top
the pin on the arm passes through the said hole, the arm resting upon and actuating
a lever which is in connection with the ordinary stop rod thereby dislodging the
same from the catch and stopping the loom.

page_text: •
I FRANCIS WILLIAMSON of Griffe Mill near Haworth in the County of York,
Spinner and Manufacturer, do hereby declare the nature of my Invention for
IMPROVEMENTS IN APPARATUS FOR STOPPING LOOMS BEFORE THE WEFT IS
FINISHED ON THE BOBBIN, 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 certain improvements in looms for weaving, and has for
its object the stopping of the loom by mechanical means before the weft is all.
woven from off the bobbin or tube in the shuttle, in order to obviate what are
termed "broken picks," by which the fabric is greatly deteriorated in value, and is
applicable for stopping what are known as single shuttle, box looms, revolving
shuttle box, drop box and pick and pick loons; and consists in securing to the
framework of the loom a card cylinder and cards, to which motion is communicated
by a reciprocating arm or lever, to which a rod is attached for turning the card
cylinder thereby changing the cards, and after a certain number of changes a lever
or pin comes in contact with the ordinary stop rod, and dislodges it from the usual
notch, thereby stopping the loom.
In order that my Invention and the simplest means at present known to me for
carrying the same into effect may be understood, I will further describe the same
by reference to the accompanying Drawings, in which Figure 1 represents such
portions of the end elevation of a loon as are required to narrate one way of
stopping the loom by means of card plates. Figure 2 illustrates another method
and Figure 3 shews the arrangement of my apparatus when applied to revolving
shuttle boxes. Figure 4 is an enlarged detail of the end view of the card cylinder
and catch wheel used when the cylinder is mounted in the position and actuated as
shewn by Figure 1. Figure 5 is a side view of the same, and Figure 6 is an end
view of the card cylinder and catch wheel used when a pin is secured to a card
plate for stopping the loom as shewn by Figures 2 and 3.
In order to stop looms when the card cylinder is mounted in the position as
shewn by Figure 1, I secure to the loom end frame a bracket, and mount thereto
the card cylinder A upon a stud secured to the said bracket. In connection with
the card cylinder is a catch wheel B, and above the said cylinder, I mount a
reciprocating arm C which is actuated by means of revolving eccentric D, and on
the arm C being raised the catch rod E which is jointed thereto, turns the catch
wheel B the distance of one tooth, thereby changing the position of the card
plates F, every time the arm C, and the catch rod E are raised. The number of
card plates F are regulated by the length of yarn on the bobbins or tubes and the
width of the fabric being woven, and according to this arrangement of my apparatus
for stopping the loom, one of the card plates has a hole G through, for the purpose
as hereinafter explained.
On the reciprocating arm C descending, the pin H, which is secured thereto,
rests upon each card plate as they arrive at the top of the cylinder, except when
the before mentioned card plate with the hole G through arrives at the top, then
the pin H passes through the hole, and allows the spring S to draw the arm C
towards the card cylinder, the slot in the end of eccentric rod D' on the eccentric
revolving, allowing the arm C to descend, until it rests upon the end of lever J,
and the pressure thereon is sufficient to actuate the said lever mounted on
fulcrum J, and cause the opposite end of lever at J' to press against the stop rod K,
and force it out of the ordinary notch; such rod K being mounted and in
connection with the belt guide, throws or moves the belt from the fast to the loose
pulley in the usual manner.

page_text: When I mount the card cylinder in the position and secure a pin to one of the
card plates as shewn by Figure 2, I actuate the card cylinder by mounting the
lever L on a fulcrum, and give a reciprocating motion to the same by means of an
eccentric or tappet M acting on one arm of the lever, and to the other arm or
opposite end of the lever, I joint a catch rod E, which turns the catch wheel B the
distance of one tooth each oscillation of the lever, thereby changing the position of
the card plates F, the catch E being kept in contact with the catch wheel B by
spring S. By this arrangement, the card plates are regulated in a similar manner
as before described in reference to Figure 1, and when the card plates are turned
so that the pin P which is secured thereto presses against the stop rod K, it is
forced out of the ordinary notch, thereby moving the belt from the fast to the loose
pulley in the manner as before described.
When applying my Invention to revolving shuttle box looms, I mount the card
cylinder in a similar position as in Figure 2, but actuate the reciprocating lever or
arm N in a different manner, which I mount on a stud at N¹, and attach a
spring S to the opposite end, to which is also jointed a catch rod E. I give motion
to the arm N by securing to each ordinary oscillating catch rod O, a stud R,
(see Figure 7) one of which comes in contact with the said arm N and depresses it
every time either of the catch rods O are moved in the direction of the arrow, for
turning the shuttle boxes, which are operated upon in the usual manner.
When the arm is depressed in the manner described, the catch rod E moves the
catch wheel B the distance of one tooth, thereby changing the position of the card
plates F, and when the plates are turned so that the pin P which is secured
thereto, presses against the stop rod K, it is forced out of the ordinary notch, and
thereby stopping the loom as before described.
"
When my stopping apparatus is applied to drop box or pick and pick looms, the
card cylinder may be mounted in any convenient position to suit the build" of
the loom, the catch wheel turned or operated upon in a similar manner to that
before described, and the cards made to act upon the stop rod K either by a pin P
secured to a card plate, or by means of a lever somewhat after the manner as before
described in reference to lever J in Figure 1, and thereby dislodge the stop rod K
from the ordinary, notch and stop the loom in the manner as before described, and
to whatever class of loom my stopping apparatus is applied, the number of cards
on the cylinder are regulated by the length of yarn on the bobbins or tubes and the
width of the fabric being woven.
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 :-
The stopping of looms before the weft is finished off the bobbin or tube in the
shuttle by means of card plates acting through a lever or pin upon the stop rod J
and dislodging it from the usual notch in which it rests whilst the loom is
running.
Dated this 1st day of April 1884
WAUGH & CHAPMAN,
Agents for the Applicant.