IMPROVEMENTS IN WEFF STOP MOTION FOR LOOMS
Year: 1882

page_text: LETTERS PATENT to Herbert John Haddan of Kensington Middlesex for an
Invention of IMPROVEMENTS IN WEFF STOP MOTION FOR LOOMS. A communi-
cation to him from abroad by Lucius James Knowles of Massachusetts
United States.
i
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 "IMPROVEMENTS IN
WEFT STOP MOTION FOR LOOMS a communication to me from abroad by Lucius
James Knowles of Massachusetts United States
The invention consists of a long feeler shaft extending when applied to a loom
from the middle of the warp to the exterior thereof, with feeler wires and dagger
both rigidly attached to the said feeler shaft so that they tilt or vibrate in opposite
directions but the former at the inner end and the latter at the outer end of said
feeler shaft, also of a governing rod the same being a long rod, which has when
the stop motion is applied to a loom a substantially upright position in the vertical
plane of the dagger and is pivoted and connected with the other parts of the weft
stop motion so that it only swings with the lay, although upon a different centre,
but relatively to the lay has at its upper end a vertical motion Also of a hori-
zontal lever pivoted to the lay to serve as the dagger of the weft stop motion said
lever being connected by a rod and crank disk with the feeler shaft.

page_text: c
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
31st January 1883.
"
HERBERT JOHN HADDAN, of Kensington, Middlesex IMPROVEMENTS IN
WEFT STOP MOTION FOR LOOMS," a communication to me from abroad by Lucius
James Knowles, of Massachusetts, United States
The first part of the invention is shown in Figures 1, 2, 3, and 4 of Sheet 1, it
being a "Weft stop motion consisting essentially of (1) a long feeler shaft,
extending, when applied to a loom, from the middle of the warp to the exterior
thereof (2) the feeler wires and dagger, both rigidly attached to the said feeler
shaft so that they tilt or vibrate in opposite directions but the former at the inner
end and the latter at the outer end of said feeler shaft-(3) a governing rod, the
same being a long rod, which has, when the stop motion is applied to a loom-a
substantially upright position in the vertical plane of the dagger and is pivoted and
connected with the other parts of the weft stop motion, as hereinafter described, so
that it not only swings with the lay, although upon a different centre, but relatively
to the lay has at its upper end a vertical motion.
In the drawings of Sheet 1, Figure 1, is a side elevation partially in section, of so
much of a loom and attachments thereto as is sufficient to illustrate the construction
and mode of operation of the said improved stop motion. Figure 2, is a partial
front elevation of the lay and parts of the stop motion thereupon. Figure 3 is a
partial plan of the lay and mechanism attached thereto and alse of the breast beam
and mechanism supported thereby, together with a portion of the warp and woven
cloth. Figure 4 is a detail of construction.
A is the loom frame, B is the breast beam-C is the shipper lever shaft, being a
rock shaft in suitable bearings beneath the breast beam. It has connected with it
any ordinary belt shifting mechanism and a shipper lever for operating said.
mechanism by hand, D is the knock off lever being a weighted elbow lever rocking
upon a shaft c which has bearings in a bracket B₁ bolted to back of the breast
beam at a portion thereof lying outside of the warp.
The knock off lever is so weighted that its upper arm in its normal position is
nearly perpendicular. This arm has a horizontal projection e to receive the thrust
of the dagger as hereinafter described. The lower arm carries a pin d, which is in
constant contact with an arm or lever E, rigidly secured to the shipper lever
shaft C, so that when the dagger strikes the projection e of the knock off lever-the
said pin d, bears upon the arm E to rock the shipper lever shaft and operate the
belt shifting mechanism. The projection e has a flange as shown to prevent the
point of the dagger from slipping over it.
Lis the lay-H is one of the lay-swords pivoted to a pin i at the bottom of
the loom frame, the said pin being the centre of vibration of the lay and parts
attached to the lay.
J and J¹ are two plates secured to the front face of the lay by screws, as shown,
one within the warp and the other outside of it. Each plate has at the top a
lug, a and a¹, in which are bearings for the long feeler shaft a², as shown. The
feeler wires w, are secured to the inner end of the feeler shaft in front of the feeler
slot 8, by means of an adjustable sleeve d¹ as shown. A screw p secures the wires
to the said sleeve, and a screw p¹ secures the sleeve to the shaft. To the outer end
of the feeler shaft a², outside of the lug a¹, is rigidly secured the dagger K as
shown. Its rear end extends into a small slot 82 in the lay. A stop t in said
slot limits the downward movement of the rear end of the dagger and conse-

page_text: quently of the feeler wires-since the feeler wires, and dagger are rigidly secured
to the same shaft. A spring , wound around this shaft, namely, the feeler shaft a¹
and having one end secured to the lug a while the other is secured to a slide b
held upon said feeler shaft, in any required position by a screw as shown tends to
throw the rear end of the dagger down upon the stop t.
The dagger K and the knock off lever D are located relatively to each other, one
upon the lay and the other upon the breast beam-and both outside of the warp
as shown.
P is the before mentioned governing rod, pivoted to a stand R upon the floor
beneath the loom as represented. Near its upper end it is bent, as shown, so that
its upper portion is parallel with the front face of the lay. This upper portion
enters a slot cut in the rear of the plate J¹ in the vertical plane of the dagger and
has a vertical play in this slot as hereinafter described.
The adjustment is such than when the lay reaches a proper place in its backward
movement the upper end of the governing rod strikes the rear end of the dagger
and through the-remainder of the backward movement of the lay overcomes, the
force of the spring 7 and raises the rear end of the dagger, and consequently rocks
the feeler-shaft a² and raises the feeler wires. As the lay comes forward the
governing rod recedes through the slot in the back of the plate J' and is followed
down by the rear end of the dagger under the force of the spring . The feeler
wires fall with the rear end of the dagger until, in the normal operation of the
loom, they rest upon the weft thread. If the weft thread has been well thrown
the feeler wires resting upon it hold up the dagger, against the force of the spring,
through the remainder of the forward movement of the lay, so that its point passes
under the projection e of the knock-off lever; but if the weft thread has not been
well thrown and the feeler wires fail to find it they fall into the slot s in the lay,
and accordingly the rear end of the dagger descends in the slot s¹ until it rests
upon the stop t, the point of the dagger in the mean-time rising so as to strike
the projection e of the knock-off lever and operate the belt shifting mechanism.
A slot is cut in the breast beam, as shown in dotted lines, to receive the point
of the dagger when it passes under the projection e, and is of such shape as to
permit the vibration of the dagger and feeler wires to begin at any required time.
I claim in combination with the lay and suitable bearings, the long feeler shaft a²
(one end of which lies within and the other without the warp) the feeler wires w,
the dagger K and the governing rod P, substantially as described.
In the statement I have herein before given of the first part of the invention, I
have described and claimed, as a new device for controlling the movements of the
feeler wires of a weft stop motion, a substantially perpendicular rod whose upper
and free end passes through a hole in a rigid attachment to the lay while its lower
end is so pivoted that the rod will vibrate with the lay but upon a different centre.
When the lay moves backward the said rod, which is termed the govering rod, not
only swings back with it, but has at its upper end a longitudinal motion upward
through the hole, and, in course of its double motion, strikes and lifts a horizontal
lever, which is pivoted to the lay. When the lay moves forward the upper part of
the govering rod recedes through the hole and the horizontal lever follows it down,
either from its own weight or by force of a spring. The said horizontal lever serves
as the dagger of the weft stop motion, and is connected by a connecting rod and
crank disk with the feeler shaft. Consequently when the governing rod lifts the
rear end of the dagger to which the connecting rod is attached, it raises the feeler
wires also, and when the dagger follows the receding governing rod down it pulls
down the feeler wires.
The object of the second part of this invention is to do away with the invervening
mechanism between the dagger and feeler wires. In embodying the said second
part of the invention in operative mechanism, I make use of substantially the same
connecting rod; and the horizontal lever, which is lifted by it and follows it down,
performs the office of a dagger substantially as in the mechanism of the first part
of the said invention, but, instead of there being separate shafts or pivots for the

page_text: dagger, and feeler wires, they have one and the same pivot, and vibrate or tilt
together as one piece, the actual construction being that the dagger is hung upon a
stationary pivot in front of the feeler slot in the lay and that the feeler wires
project from the rear end of the dagger back of the pivot in substantially the same
plane with the dagger.
In Sheet 2, of the drawings I have represented the second part of the invention,
which I now proceed to describe.
In the said Sheet 2, Figure 1 is a side elevation, partially in section, of so much
of a loom as is necessary to illustrate the said second part of the invention.
Figure 2 is a partial front elevation of the lay and parts of the stop motion
thereupon, Figure 3.is a plan of the same, Figure 4 is a partial plan of the breast
beam and mechanism supported thereby belonging to the belt shifting mechanism
operated by the dagger, Figure 5 is a detail of construction.
A is the loom fame-B is the breast beam, C is the shipper lever shaft, being a
rock shaft in suitable bearings beneath the breast beam. It has connected with it
any ordinary belt shifting mechanism and a shipper lever for operating said
mechanism by hand-D is the knock off lever, being a weighted bent lever rocking
upon a shaft c which has suitable bearings in a bracket B¹, bolted to the back of
the breast beam. The upper arm of the knock off lever is nearly perpendicular in
its normal position and has a horizontal projection e to receive the thrust of the
dagger as hereinafter described. The lower arm is weighted and carries a pin d,
which is in constant contact with an arm or lever E, rigidly secured to the shipper
lever shaft C, so that, when the dagger strikes the projection e of the knock off
lever, the said pin d bears upon the arm E, to rock the shipper lever shaft and
operate the belt shifting mechanism.
:
L is the lay. H is one of the lay swords, pivoted to a pin i, at the bottom of the
loom frame, the said pin being the centre of vibration of the lay and of parts
attached thereto. J is a bracket secured to the lay in front of a slot 8 by screws as
shown. Near the upper edge of the lay the bracket J has a projection from a hole
in which projects a pin e' which serves as a pivot for the dagger K. This pin e' is
beld in any required position in said hole by a screw b; and since the feeler wires
and dagger are in one piece as will hereafter appear, the adjustment of both feeler
wires and dagger is regulated by this single screw-The dagger vibrates freely
upon this fixed pin and is held thereon by a washer and screw as shown. The rear
end of the dagger may be so heavy relatively to the forward end that the rear end
will tend to fall of itself and keep the point of the dagger up; but in the mechanism
shown, a spring 1, one end of which passes through the pin e', while the other bears
upon a pin t, in the dagger, tends to keep the rear end and the point of the dagger
in their positions.
The feeler wires w are secured to the rear end of the dagger by a screw m, as
shown A stop u, limits the downward vibration of the rear end of the dagger and
consequently the downward vibration of the feeler wires when they go below the
place of the weft thread-In the position shown in the drawings the feeler wires
have passed below the place of the weft thread and the rear end of the dagger
rests on the stop u, the point of the dagger being in -position to strike the
horizontal arm e of the knock off lever before the finish of the forward movement
of the lay. This horizontal arm e has a flange as shown to prevent the dagger from
slipping over the arm.
P is the before mentioned governing rod, pivoted to a stand R, upon the floor
beneath the loom as shown.-Near its upper end it is bent, as shown, so that its
upper portion is parallel with the front face of the lay. This upper portion enters
a slot cut in the rear of the plate or bracket J, in the vertical plane of the dagger,
and has a vertical play in this slot as hereinafter described.
The adjustment is such that when the lay reaches a proper place in its backward
movement, the upper end of the governing rod strikes the rear end of the dagger
and through the remainder of the backward movement of the lay overcomes the
force of the spring 7 and raises the feeler-wires-As the lay comes forward the

page_text: governing rod recedes through the slot in the back of the plate J, and is followed
down by the rear end of the dagger which brings with it the feeler wires, until, in
the normal operation of the loom they rest upon the weft thread. If the weft
thread has been well thrown, the feeler wires resting upon it hold up the dagger
through the remainder of the forward movement of the lay so that its point passes
under the projection e of the knock off lever; but if the weft thread has not been
well thrown, and the feeler wires fail to find it, they fall into the slot s in the lay
and the point of the dagger rises so as to strike the said projection e and operate
the belt shifting mechanism.
8
A slot cut in the breast beam, as shown in dotted lines, to receive the point of
the dagger when it passes under the projectione, and of such shape as to permit
the vibration of the dagger and feeler wires to begin at any required time.
I claim in the second part of this invention―
1. The combination of the feeler wires and dagger with a single shaft, or pivot
pin and suitable mechanism for tilting or vibrating the same, the lay, and a suitable
bearing for said shaft or pivot pin, substantially as described.
2. The combination of the lay L, governing rod P, plate J, pivot e' dagger K,
feeler wires w and slot s substantially as described.
3. The combination of the dagger D, feeler wires w, pivot e', the bearing for the
said pivot and the screw b, substantially as described.
4. The combination of the shipper lever shaft C, the rigid arm E, the weighted
elbow lever D, the latter provided with the pin d and projection e, shaft c, the breast
beam, suitable bearings and a suitable belt shifting mechanism, substantially as
described.
In Witness whereof I the said Herbert John Haddan have hereunto set my
hand and seal this thirty-first day of January A.D. 1883.

page_text: PA
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