IMPROVEMENT IN WEFT STOP MOTIONS FOR LOOMS
Year: 1882

page_text: LETTERS PATENT to Herbert John Haddan of Kensington Middlesex for
an Invention of IMPROVEMENT IN WEFT STOP MOTIONS FOR LOOMS
A com-
munication to him from abroad by Lucius James Knowles of Massachusetts.
United States.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 31st July 1882.
HERBERT JOHN HADDAN of Kensington Middlesex "IMPROVEMENT IN
WEFT STOP MOTIONS FOR LOOMS" a communication to me from abroad by Lucius
James Knowles of Massachusetts United States
The invention consists in the combination in a weft stop motion, of a dagger and
fingers, so connected that the movements of the one depend upon the movements
of the other, with a rocking shoe operating to guide the dagger, or receive and
communicate its thrust to the belt shifting mechanism. The lay being at its rear
position in the loom the forward end of the dagger is made to rest upon the highest
part of the shoe and the feelers stand up, the gravitating power of the dagger being
such that in the forward motion of the lay the forward end of the doffer follows
down a steep incline in the shoe and lowers the fingers. The whole may be made
in metal or of metal & wood combined.
"

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
26th January 1883.
IN
HERBERT JOHN HADDAN, of Kensington, Middlesex "IMPROVEMENT
WEFT STOP MOTIONS FOR LOOMS," a communication to me from abroad by Lucius
James Knowles of Massachusetts, United States
The invention consists in the combination, in a weft stop motion, of a dagger and
fingers, so connected that the movements of the one depend upon the movements
of the other, with a rocking shoe operating to guide the dagger, or receive and
communicate its thrust to the belt shifting mechanism, as hereinafter set forth.
The invention consists further in certain details of construction hereinafter
claimed.
In the drawings I have shown only so much of the frame and mechanism of a
loom as is necessary to illustrate the said invention, and its mode of operation; and
of these parts, Figure 1 is a side elevation, the lay being represented in its extreme
rear position, Figure 2 is a plan, showing the lay still in its extreme rear position,
the weft thread being supposed to have been thrown, Figure 3 is a sectional
elevation on line x, x, of Figure 2, with the lay however, somewhat advanced,
Figure 4 is a partial front view of the lay, at the middle portion thereof including
that portion of the weft stop mechanism attached thereto."
A, is part of the loom frame, B is the breast beam. C is the shipper-rod, passing
loosely through holes in projections a, a, upon a supporting plate adapted to rock
upon a pivot b in the end of an arm E projecting from the loom frame-F is a
spiral spring upon the shipper-rod C, such spring being between a projection a and
a fixed sleeve c on said rod as shown. G is the shipper-lever, secured by a set
screw e, to a projecting end of a rock shaft H extending across the loom and
having bearings in the ends of its frame. The shipper-lever is connected with the
shipper-rod by a lever I which hinged to the shipper-rod at f has its fulcrum g
projecting from the loom frame, a pin, h. projecting from the shipper-lever extends
into a locking slot i in the upper end of the lever I. A stop j limits the backward
movement of the shipping-lever.
Jis a finger projecting from a sleeve secured by a set screw k, to the rock
shaft H-K is a shoe pivoted upon a stud l in an arm L which projects from the
breast beam as shown. Cast in one piece with the shoe K, is an elbow arm m, the
horizontal portion of which is in contact with the upper edge of the finger J,
the said finger being of such shape that a slight rocking forward of the elbow arm
pushes such finger down, and thus turning the shaft H and operating the belt
shipping mechanism. The turning motion of the shoe K is limited by a notch n
in its lower edge, into which extends a projection o from the arm L, the centre of
gravity of the shoe and the elbow arm being arranged to produce a tendency of the
elbow arm to be raised off the finger J and the shoe to be thrown back as far as
the slot n and projection o will permit.
The shoe K has a stop p, to receive the thrust of the dagger. The rear portion
of the shoe projects upward and is cam-shaped to guide the dagger as will hereafter
appear. S is the lay to be reciprocated by means of the crank wheel M and con-
necting rod N. P is the dagger made in two parts one of which is held in a socket
in the other by means of a set screw y. The dagger is pivoted at v to a bracket u
beneath the lay and is connected by a rod w with the crank pin of a small crank
shaft 8¹ which has bearings, as shown, in a bracket t upon the front of the lay.
This crank shaft s¹ carries the feelers e¹ secured thereto by a hub c¹ and set

page_text: screw t². The feelers are opposite the slot r and fall into the slot to automatically
stop the loom.
The operation is as follows:
The lay being at its rear position in the loom-the forward end of the dagger
rests upon the highest part of the shoe K, and the feelers e' stand up, but the
gravitating power of the dagger is such that, in the forward motion of the lay, the
forward end of the doffer follows down the steep incline of the shoe K and lowers
the fingers. If the weft thread has been properly stretched across the slot r the
feelers striking it will rest upon it and hold the dagger up so that in its con-
tinued forward motion it will clear the stop p. When the lay again goes back
in the loom the forward end of the dagger riding up the steep incline of the shoe
will raise the feelers to their nearly upright position. But if in the forward
motion of the lay the weft thread has not been properly thrown the feelers in their
downward movement will fall into the slot r, and permit the forward end of the
dagger to strike the stop p, thereby rocking the shoe K forward and operating the
belt shipping mechanism as before stated.
The dagger has a slot p² in its upper edge, one side or the other of which strikes
against the bracket u to resist the thrust of the dagger or limit the forward throw
of the feelers.
The bracket t extends some distance above and around the crank shaft s¹ and
CLAIMS.
1. In a loom the lay S, feelers e', dagger P, crank shaft s' and connecting rod w,
in combination with the breast beam B, rock-shoe K, fingers J, shaft H, and a belt
shifting mechanism, substantially as described.
2. The dagger P (adapted to be attached on the under side of the lay) the
connecting rod w, the shaft s' and the feelers e¹, in combination with the bracket t,
(adapted to be attached to the lay) and the cam or shoe K, adapted to be attached
to the breast beam substantially as described.
In Witness whereof I the said Herbert John Haddan have hereunto set my
hand and seal this twenty-sixth day of January A.D. 1883.
(sin)
HADDAN