IMPROVEMENTS IN LOOMS FOR WEAVING CLOTH
Year: 1882

page_text: LETTERS PATENT to Herbert John Haddan of Kensington Middlesex for an
Invention of IMPROVEMENTS IN LOOMS FOR WEAVING CLOTH Communi-
cated 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 "IMPROVEMENTS IN LOOMS
FOR WEAVING CLOTH" a communication to me from abroad by Lucius James
Knowles of Massachusetts United States
This invention relates to the driving and brake mechanisin of power looms, and
more especially to that class of power looms in which the driving pulley is
convertible into a loose pulley, and consists in the combination of a convertible or
fast and loose pulley with a brake wheel and brake, the internal mechanism of the
driving pulley for converting it from a fast to a loose pulley being under the
direct control of the brake by means of a rigid projection thereon.―The invention
consists further in the combination of a convertible or fast and loose driving
pulley a brake and brake wheel and suitable mechanism for operating the brake
and converting the driving pulley into a loose pulley, with an ordinary loose
pulley and a belt shifting device, the shipper lever of the latter being under the
direct control of the mechanism which operates the brake.

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
31st January 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex "IMPROVEMENTS IN LOOMS
FOR WEAVING CLOTH," a communication to me from abroad by Lucius James
Knowles, of Massachusetts, United States
The several parts of this invention are shown in sheets 1. 2. 3 and 4 of the
accompanying drawings, that of each sheet being separately described and claimed.
The first portion of the said invention is shewn in Sheet 1. and relates to the
driving and brake mechanism of power looms, and more especially to that class
of power looms in which the driving pulley is convertible into a loose pulley ;
and a part of the first portion of this invention consists in the combination of a
convertible or fast and loose driving pulley with a brake wheel and brake, the
internal mechanism of the driving pulley for converting it from a fast pulley to a
loose pulley being under the direct control of the brake by means of a rigid
projection therefrom-The invention consists further in the combination of a
convertible or fast and loose driving pulley, a brake and brake wheel and suitable
mechanism for operating the brake and converting the driving pulley into a loose
pulley with an ordinary loose pulley and a belt shifting device, the shipper lever
of the latter being under the direct control of the mechanism which operates the
brake. The invention has been embodied in mechanism constructed with especial
reference to its operation by the dagger of a weft stop motion; and accordingly
the said mechanism is shown and described in connection with a weft stop motion
by which it may be operated. Any ordinary stop motion might be substituted for
the one here shown. The invention consists further in the novel construction of
the fast and loose driving pulley whereby it may be converted into a loose pulley
promptly. In the drawings of said Sheet 1. Fig 1 is a plan of so much of a loom
as is necessary to illustrate the construction and mode of operation of the present
inventions. Fig: 2 is a Section taken on the line A', B¹. of Fig: 1-Fig 3. is a Section
of full size on line x, x, of Fig: 2-Fig: 4 is a Section on line x¹. c. of Fig: 1; and
Fig: 5 is a partial end elevation, Fig: 6 is a side elevation of Pulley P¹. L. is the
lay; B is the breast beam. F is the loom frame; S, is a rock shaft in suitable
bearings beneath the breast beam, one of which g, is shown. This Shaft is usually
known as the shipper lever shaft, and is herein at times so designated, although in
the construction shown the shipper lever is not rigidly secured to the shipper-
lever-shaft as usual, but is pivoted to an independent stud and is indirectly moved
by the Shaft-To the said shaft S near the middle of the loom is rigidly secured
the knock off levert to receive the thrust of the dagger of a weft stop motion
which will be next described. In the middle of the lay is a slot a while b is a
bracket or stop motion frame secured to the lay in front of the slot. To the lower
part of the bracket at a, is pivoted the dagger d, while the upper part furnishes
bearings for the finger shaft c, to which are secured a finger or fingers as shewn-
The finger shaft c and the rear end of the dagger d are connected by a crank disk e,
a wrist pin p., and a connecting rod r, and accordingly the finger and dagger ride
together, each in turn partaking of or controlling the motion of the other, but the
fingers falling as the point of the dagger rises and rising when the point of the
dagger falls. A spring s¹ wound about the pivot a of the dagger and pressing
against a pin a' in the dagger tends to throw the point of the dagger up--To the
breast beam B is secured a guide bar u, as shown, and against the guide bar under
the force of the spring 8¹ presses a horizontal rigid arm V extending from the

page_text: dagger. This guide bar u, is so inclined for the greater part of its length as to
constantly change the direction in which dagger points during the reciprocating
motion of the lay, and thus change of position of the dagger causes by means of the
crank-connection above described a corresponding change in the position of the fingers
- Near the breast beam the incline of the guide rod is steeper. In the ordinary
operation of the loom, when the weft has been properly thrown the arm V no
longer follows the guide bar for the weft holds up the fingers and prevents the
dagger from rising-But, when the weft has not been well thrown, and the fingers
fail to find it, and fall into the slot 8, the arm V follows up the steeper of the
incline or guide bar u and strikes the knock off lever and automatically operates
the belt shifting mechanism or the belt shifting mechanisin and brake wheel
mechanism connected with it as hereinafter described.-S. is the crank shaft or
that shaft in the loom to which power is first communicated. P. P. being two
pulleys thereon, of which P is an ordinary loose pulley and P¹. a fast and loose
pulley of peculiar construction which will presently be described. P. is a spoked
wheel, also upon the shaft S¹. and keyed thereto-It has its periphery struck upon
two distinct circles, thus presenting two distinct faces or rims, the larger of
which b¹. is smooth and serves for a brake wheel, while the smaller 68., has teeth t',
which take into the teeth of a larger wheel, not shown, to communicate motion
from the shaft S¹. to the other parts of the loom. The rim b' of the wheel P². is
connected with rim 62 by arms a' which are curved in such manner as not to
interfere with the teeth t¹-B2, is the brake, pivoted to the lower part of the loom
frame at n, and having its upper end shaped as shewn, to fit the smooth rim b¹ of
the wheel P. The pulley P¹ before mentioned has upon the side next the wheel P³
a cylindrical boss or ring upon the inner face of which projecting inward are
teeth t³. A spring dog Ď pivoted to one of the spokes of the wheel P³, has its free
end of such shape that it will fit between two of the teeth t. of the ring 7 of the
pulley P. When the dog is thus held between two of these teeth the wheel P*
must turn with the pulley P. and the pulley P¹. is in effect a fast pulley
communication motion to the loose. When the dog is disengaged from the said
teeth the pulley P₁. can turn free from the wheel P. and is a loose pulley. The
spring dog D, is of peculiar construction and is best shewn at Fig: 3 which as
before stated is an enlarged view taken on line x, x, of Fig: 2 and in which b
represents the reverse or inside face of the toothed rim of the wheel P2; whose outer
face has already been designated by the same letter; 63. is a strengthening rib
and the spoke to which the dog D is pivoted for this purpose, the spoke,
containing a hub h which is cast with it and through which passes the shaft a³ of
the dog, a large slot in the dog permitting it to embrace both ends of the hub.
The free end of the dog which engages with the teeth t is marked d². Screwed
to the dog is an arm n¹ which is normally so held by a spring 8. as to keep the
dog engaged with the teeth t' of the pulley P¹. The dog has a projection d³ and
the brake a corresponding arm or projection p². of such length that it will strike
the projection d³. just before the brake falls upon the smooth rim b' of the wheel P³.
-H is a stud in the frame upon which is pivoted a bell crank lever J, to the lower
and short arm of which is pivoted one end of a connecting rod R, hinged at the
other end to the brake B. The upper and longer arm of the bell crank lever J,
carries a roller m'. To the rock shaft S outside of the loom frame and over the
roller m¹ is rigidly secured a lever T, the short end of which is so shaped as to
form with the roller m' a knuckle joint. In the normal condition of the loom the
lever T has no effect upon the bell crank lever J, but, when the rock shaft S, is
rocked, which happens when the knock off lever. t, receives the thrust of the
dagger, the fingers f having failed to find the weft the lower T forces down the
long arm of the bell crank lever J, thus pulling forward the connecting rod R. and
operating the Brake B. and Dog B.-The long arm of the lever T permits the
knuckle joint above described to be operated by hand as well as by the thrust of
the dagger. This arm is so shaped as not to interfere with the movement of a
lever V, belonging to the shuttle-box stop-motion.-To the stud H is also pivoted

page_text: :
the shipping lever K. held in place by a nut or screw wand operating an ordinary
belt shifting device as shown at Fig 1. This device consists of the lever K¹.
swinging horizontally upon an upright pin e³ in a projection H* from the loom
frame. In the rear end of the lever K. is a slot e through which projects upward
a pin p³., set in a sleeve K., which has a longitudinal motion on a shaft O, projecting a
from the loom frame parallel to shaft S'.-To the sleeve K2. is attached an ordinary
belt holder M. A spiral spring wound round the shaft O within the sleeve K².
tends to throw the sleeve outward and place the belt upon the loose pulley P".
The forward end of the lever K contains a pin e. which works, and normally is
When the
locked, in a scroll slot e in the lower end of the shipping lever K.
upper arm of the shipping lever K, is pulled forward to lock the pin es in the
slot e, the sleeve K2. is drawn inwards upon the shaft O, and the belt is moved
upon the driving pulley P'. When the upper arm is pushed back the sleeve K². is
thrown out upon the shaft O by a spiral spring within the sleeve and upon the
shaft, and the belt is shifted to the loose pulley P. The belt is thus shifted by 1
hand; but in order that it may be shifted automatically by the dagger belonging
to the weft stop motion at the time the dagger operates the brake and converts the
driving pulley into a loose pulley the connecting rod R, has a projecting G, which
upon the forward motion of the connecting rod R upon the fingers failing to find
the weft as before described, strikes the belt shipping lever K below the stud H at s
the proper time to shift the belt-That this projection G. may be adjustable it is
made separate from the connecting rod and in part consists of a thimble which
slips upon the connecting rod and is held in any required place by a set-screw g.
(See Figs 2 and 5)-A projection K³. from the Sleeve K². rides at one end in a slot
in h. which is a part of the projection H2. to prevent the sleeve K*. from turning s
on its shaft O.
I claim as the first part of this invention.
1. The combination of the fast and loose pulley P'. the wheel P%. provided with
two rims, one smooth and the other toothed, suitable mechanism for interlocking
said pulley P¹ and wheel P*. the Brake B. and its projecting arm p³. the shaft S,
and suitable intervening mechanism for communicating the movements. of said
shaft S to the said brake B' substantially as described.
2. The combination of the pulley P¹. provided with ring and teeth ; and the
brake wheel P2. provided with the two rims 61 62 teeth t and spring dog D, with
the brake B². and arm p³., the shaft S and suitable intervening mechanism between
said shaft S and said brake B' whereby the movement of the shaft is communicated
to the brake all substantially as described.
3. The pulley P¹. provided with the ring land internal teeth t. in combination
with the brake wheel P. provided with two rims b'. 62. and spring dog D, the latter
pivoted to the wheel P. and working with the teeth t. substantially as described.
4. The pulley P¹. provided with ring l. and internal teeth t. wheel P. provided
with two rims 6' 62 and spring dog D. working with the teeth t. in combination
with the brake B. and arm p. and suitable mechanism for moving the brake
substantially as described.
5. The pulley P¹. provided with ring and teeth t³, and the brake wheel P
provided with the two rims b¹. 62. teeth t¹. and spring dog D, in combination with
the brake B. and arm p². the connecting Rod R, bell crank lever J, lever T, shaft S,
and knock off lever t the latter adapted to receive the thrust of the dagger of a
weft stop motion all substantially as described.
6. The loose pulley P. the shipper lever K. and a suitable belt shifting mechanism
operated by said lever, the pulley P. with ring and teeth t. and the brake
wheel P. with rims b¹ 6* teeth t¹ and spring dog D in combination with Brake B³.
arm p² connecting rod R, bell crank lever J. lever T, shaft S., and knock off lever t.
all substantially as described for the purpose specified.
7. The loose pulley P, the shipper lever K and
operated by said lever, the pulley P₁ with ring
wheel P. with rims b'. b. teeth t' and spring dog D
the belt shifting mechanism
and teeth t. and the brake
in combination with brake B³.

page_text: arm p². connecting rod R projection G. bell-crank-lever J. lever T, shaft S. and
knock off lever t, all substantially as described for the purpose specified.
8. The combination of the loose pulley P, shipping lever K and belt shifting
mechanism operated by said lever the pulley Pl with ring 7 and teeth t². brake
wheel P. with rims b. b teeth t¹ and spring dog D, brake B². with its arm på shaft $
and suitable connections between said Shaft S and said brake B'. and between said
shaft S, and said shipping lever K, by means of which a rocking of the shaft may
be communicated to both brake and shipping lever substantially as described.
The second part of this invention is shown in sheet 2 of the drawings, and it'
relates to a weft stop motion and lies in the combination of a belt shipping
mechanism with a knock off lever and a weft stop motion, the latter consisting
essentially of a finger or fingers working in or over a slot in the lay to find the
weft and positively connected by a crank and connecting rod with a vibrating
dagger, the knock off lever rigidly connected to the shaft of the shipping lever and
receiving the thrust of the dagger when the fingers fail to find the weft. This
invention lies further in certain details of construction-In the drawings of said
Sheet 2 Fig: 1, is a plan of so much of a loom as is necessary to illustrate the con-
struction arrangement and mode of operation of the fingers dagger, and knock off
lever. Fig 2. is a sectional elevation of the same, Fig: 3 is a partial sectional elevation
on the line A¹. B¹. of Figure 1 and A². B. of Fig: 2. Figs 4 and 5 are respectively
a plan and side elevation of so much of a loom as is necessary to show the belt
shifting mechanism and its connection with the shaft carrying the knock off lever.
A is the frame;. B. is the breast-beam; C, is a rock shaft in suitable bearings
beneath the breast beam, q being one of said bearings. D, is the shipper lever
rigidly secured to said rock shaft at one end of the loom, as shown E is the shipper
rod and F the shipper fork secured thereto by a set screw a. The shipper rod E
passes loosely through a guide piece a¹ projecting from the frame, and is furnished
with a spring K, as shown, whose tendency is to throw the shipper fork F from the.
fast pulley to the loose pulley-G is a bell crank-lever working upon an upright
pin bin a projection H from the frame and connecting the lower end of the
shipper lever D with the shipper rod E by means of pins c and f and slot g. The
belt shifting mechanism above described may be operated by hand. The object of
the second part of this invention is to operate the belt shifting mechanism
automatically by a very simple weft stop motion probably simpler than any
heretofore in use and which I now proceed to describe. J is a knock off lever
rigidly secured to the rock shaft C near the middle of the loom, L is the lay and s
a slot at the middle of the lay. M is a bracket upon the lay in front of the shaft
in the lower part of which ate is pivoted the dagger N. while the upper part
furnishes bearings for the finger shaft d to which are secured a finger or. fingers t
projecting from a sleeve d' adjustable upon the shaft d by means of a set screw,
as shown. The shaft d and the dagger N are connected by a crank disk w, a
wrist pin p and a connecting rod r, and accordingly they move together each in
turn partaking of or controlling the motion of the other, but the one rising while
the other falls A spring wound about the pivote of the dagger and pressing
against a pin m in the dagger tends to throw the point of the dagger up. P is a
guide rod secured by screws to the breast beam as shewn. Against it presses a
horizontal rigid arm n extending from the dagger. The guide rod P is so inclined
for the greater part of its length as to constantly change the direction in which
the dagger points during the reciprocating motion of the lay; and this change of
position of the dagger is communicated to the fingers t by means of the connecting
rod r.
But nearer the breast beam the incline of the guide rod is steeper and in
the ordinary operation of the loom when the weft has been properly thrown, the
bar n, no longer follows the guide rod, the weft holding up the finger or fingers t
and preventing the dagger from rising. But when the weft has not been well.
thrown, and the fingers t fail to find it and fall into the slot 8, the arm n
follows up the steeper part of the incline or guide rod P and strikes the knock
off lever J and automatically operates the belt shifting mechanism before

page_text: described. Two stop o o limit the extreme up and down movement of the
dagger Further description of the mode of operation is unnecessary-The
principal merit of the improvement consists in its simplicity, the contrivance
requiring no tripping device between the dagger and the belt shifting mechanism-
The dagger has sufficient strength to operate as a hand lever and yet is controlled
by the light spring and a weft thread-I claim as the second part of this
invention.
The combination in a loom of the shipping lever D and belt shifting mechanism
operated thereby, the rock shaft C and knock off lever J with the dagger N the
fingers t and a proper cam surface to guide the dagger; the fingers and the dagger
positively connected by a crank shaft and connecting rod, and the knock off lever
receiving the direct thrust of the dagger substantially as described. The third
part of this Invention is represented in sheet 3 of the drawings it being applicable
to various forms of stop motions-Its object is to place outside of the warp portions
of the mechanism which require frequent adjustment in order that they may be
readily reached by the operators while the feelers are retained in their most
advantageous position within the warp-Instead of a short feeler shaft with its
feeler wires and its rocking vibrating mechanism both attached to it at substantially
the centre of the loom, and middle of the warp as has heretofore been a practice, I
employ a long feeler shaft and attach the wires to one end of it at the middle of
the warp, but attach the rocking mechanism for imparting vertical vibrations to
the feeler wires to the other end of the said feeler shaft outside of the warp-A
sub-division of the present portion of this invention consists in placing outside of
the warp not only mechanism for vibrating the feeler wires but the dagger and
the knock off lever while the feeler wires are retained within the warp-I have
here shewn the present improvement as used in connection with another invented
by me as will hereinafter appear the said present improvement is applicable to
many forms of stop motions now in use. In the drawings of sheet 3, Fig 1 is a
side elevation, partially in section of so much of a loom as is necessary to illustrate
the third part of this invention. Fig: 2 is a partial front elevation of the lay and
mechanism attached thereto but with the dagger shewn in section-Fig: 3 is a
partial plan of the lay and mechanism attached thereto and also of the breast beam
and mechanism supported thereby, together with a portion of the warp and woven
cloth 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 by which said
mechanism may be operated by hand-F is the knock off lever, regidly secured to
the rock shaft C¹, which has bearings in a bracket B¹, bolted to the back of the
breast beam outside of the warp, and has a notch e, to receive the thrust of the
dagger as hereinafter described. A cam projection d is also rigidly secured to the
rock shaft C¹ and bears upon an arm or lever D, rigidly secured to the shipper
lever shaft C to rock the said shipper lever shaft and operate the belt shifting
device when the dagger strikes the said notch e-E is the lay-H is one of the
lay swords, pivoted to a pin i at the bottom of the loom frame, this pin being the
centre of vibration of the lay and parts attached to the lay-J and J. are two
plates secured to the front face of the lay by screws as shewn, one within the warp
and the other outside. Each plate has at the top a lug a and a', in which are
bearings for a long feeler shaft a'. as shewn. The feeler wires w are secured to the
inner end of the feeler shaft in front of the feeler slot s by means of an adjustable
sleeve d', as shewn. K is a lever serving in the mechanism shewn both as a feeler
lever and a dagger-It vibrates upon a pin e¹ projecting from a lug 1. at the lower
part of the plate J. which extends below the lay as shewn-The said lever K is
connected with the outer end of the feeler shaft a. for the purpose of imparting
motions thereto which shall be communicated to the feeler wires, by means of a
connecting rod r, a wrist pin p and a crank t. A spring one end of which passes
through the pin e', while the other bears against a small pin t2. in the dagger K
tends to throw the point of the dagger up and the rear end down. The pin e'

page_text: can be held in any required position in the lug e to regulate the tension of the
spring . A slot c in the crank disk t and a pin c¹ in the lug a¹ limit the extreme
movements of the feeler wires and dagger in their vertical vibrations Suitable
slots are cut in the back of the plate J and the front of the lay to accommodate the
connecting rod r-P is the governing rod. Its lower end is pivoted to a stand L
upon the floor beneath the loom while its upper and free end passes loosely through
a hole in lug at the lower part of the plate J in the vertical plane of the
dagger K. The operation of the stop motion herein described as embodying the
improvement needs no description It is obvious that the long feeler shaft may be
used with the same advantage for separating the feeler wires from mechanism for
rocking the shaft when the usual cam-projection from the breast beam is used
instead of the governing rod P to control the vibration of the feeler lever and
through it the vibrations of the feeler shaft and feeler wires-Nor is it essential
that the feeler lever be employed as a dagger. An advantage within the present
invention will be gained if the feeler lever be placed outside of the warp and the
feeler wires within, whether the feeler wires are employed to operate a dagger
directly, as herein described, or, as in many well known stop motions in practical
use to operate a locking mechanism which controls a dagger having normally a
vertical vibration independent of the feeler wires.-So too without departing
from this present invention although it is not essential thereto the feeler lever
when placed outside of the warp may be attached directly to the feeler shaft. In
the mechanism above described, as shewn in sheet 3. I claim in combination with
the lay and suitable bearings thereupon, the long feeler shaft a* provided with
feeler wires at one end within the warp and rocking mechanism at the other end
without the warp substantially as described for the purpose specified. The fourth
portion of this invention is represented in Sheet 4 of the accompanying drawings,
it having reference to stop motions, and consists in a device for controlling the
movements of the feelers of a weft stop motion. A rod whose upper and free
end passes through a hole in a rigid attachment to the lay, has its lower end as
pivoted as to vibrate with the lay but upon a different centre. When the lay
moves backward the rod not only as a whole, swings back with it, but has at its
upper end a longitudinal motion upward through the said hole, and in couse of
its double motion strikes and lifts a lever, usually termed a feeler lever, which is
pivoted to the lay and has a suitable connection with the feeler wires to lift them
in turn-When the lay moves forward the rod swings with it, and the upper
portion of the rod recedes through the said hole, and the weight of the feeler lever
or a spring causes the feeler lever to follow the rod down and in turn draw down
the feeler wires.-The feeler wires may be made to control the dagger of a weft
stop motion in any ordinary manner but in the mechanism which I have repre-
sented as embodying the present invention the feeler lever which the rod in its
upward motion lifts, and which follows the rod down when the latter recedes, is
itself the dagger, and, so far as the use of the said rod, which hereafter I shall
term the governing rod, is concerned, it is immaterial whether the feeler lever be
attached to the feeler shaft or to a separate pivot-A part of the invention relates
also to adjustments of the governing rod for the purpose of regulating the motions
of the feelers-Accordingly as the governing rod is longer or shorter it strikes and
leaves the feeler lever sooner or later during the vibration of the lay-and
accordingly as the pivot is brought horizontally nearer to or carried back from the
centre upon which the lay vibrates, will the arc, in which the upper end of the
rod travels more or less approximately coincide with the normal arc of vibration
of that part of the feeler lever with which it comes in contact. The feeler wires
therefore may thus be made to take a longer or shorter time for raising and falling
during the vibration of the lay; and in their own arc of vibration they may be
made to travel rapidly when near their perpendicular position and slowly when
near their horizontal position, and thus in their normal operation fall upon the
weft thread with exceeding delicacy-A part of the fourth portion of the
invention herein described, however, has especial reference to that class of stop

page_text: motions in which the feeler lever serving as a dagger rocks upon an inde-
pendent pivot and has a crank connection with the feeler feeler shaft; and this
part of the said portion of the invention consists in making the connecting
rod between the dagger and feeler shaft adjustable in length and in placing
a stop, for limiting the movement of the feeler wires and dagger in
the feeler shaft rather than in the dagger-When this stop is directly applied to
the dagger, if the point of the dagger cannot strike the knock off lever properly, it
is with difficulty it can be made to do so except by altering the form of the dagger;
whereas, by this continuance it can easily be made to do so by merely changing
the length of the connecting rod-In the drawings of Sheet 4. Fig: 1 is a side
elevation, partially in section, of so much of a loom as is necessary to illustrate the
construction and mode of operation of mechanism embodying this said Invention-
Fig: 2 is a partial front elevation of the lay and parts of the stop-motion thereupon
with the feeler lever which serves also as a dagger, shown in section. Fig: 3 is a
top view of part of the lay-Figure 4. is a section of the lay with some of the parts
attached thereto upon the scale used in Figs 2 and 3 which is larger than that
used in Fig: 1-A is the loom-frame B is the breast-beam C is the shipper lever
shaft being a rock in suitable bearings beneath the breast beam-It has con-
nected with it any ordinary belt shifting mechanism and a lever by which said
mechanism may be operated by hand. F is the knock off lever, rigidly secured to
a rock shaft C' having bearings in a bracket B'. which is bolted to the back of the
breast beam-It has a notch e to receive the thrust of the dagger as hereafter
described. A camprojection d is also rigidly secured to the rock shaft C¹, and
bears upon an arm or lever D secured to the shipper lever shaft C to rock the said
shipper lever shaft and operate the belt shifting device when the dagger strikes
the said notch e'.-E is the lay, H is one of the lay swords pivoted to a pin I at
the bottom of the loom frame this pin being the centre of vibration of the lay and
parts attached thereto; J is the stop motion frame secured to the lay by bolts b,
nuts n, and screws 61. 6. The front plate of this frame is of considerable length
as shewn to strengthen the lay at that portion thereof in which a slot is cut to
receive the feeler-wires. The upper part of the stop motion frame J furnishes
bearings. for the feeler shaft a, to which are secured the feeler wires c projecting
from a sleeve d which is adjustable upon the feeler shaft by means of a set
screw d. as shewn, K is a lever serving in the mechanism shewn both as a feeler
lever and a dagger-It vibrates upon a pin el projecting from a lug e³ at the
bottom of the frame J. to which pin it is secured by a washer and nut, as shewn.
It is connected with the feeler-shaft for the purpose of imparting motion thereto,
by means of a connecting rod r, a wrist pin p and a crank disk t. A spring lone
end of which passes through the pin e' while the other bears against a small pin t²,
in the dagger, tends to throw the point of the dagger up and the rear end down-
The pin e¹ has a screw head, by means of which it can be turned in a hole in the
lug e, and it can be there held in any required position by a screw m, thus
regulating the tension of the spring l. The connecting rod r is made in two parts
one screwing into the other as shewn in order that the connecting rod shall be
longer or shorter as required. A slot win the crank disk t and a pin w in the
frame J limit the movements of the feeler wires and also the extreme up and down
movements of the dagger. Suitable slots are cut in the back of the frame J and in
the front of the lay to accommodate the connecting rod r-P is the governing rod-
It is pivoted to a stand L upon the floor beneath the loom and has an adjustment
forward and back by means of a slot 8', pin a', and nut d³, as shewn. That it may
be adjustable in length it is made in two parts one screwing into the other, as
shewn, and a nut g. tightening them in any required position. The upper and free
end of the governing rod passes loosely through a hole in a lug l' at the lower part
of the frame J in the vertical plane of the lever K. 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 lever K, and, through the remainder
of the backward movement of the lay, overcomes the force of the spring / or the

page_text: weight of the said lever and raises the feelers. As the lay returns the governing
rod recedes through the hole in the lay and the lever K under the force of the
spring or its own weight follows down upon the upper end of the governing rod
and pulls down the feeler wires until in the ordinary operation of the loom, the
feeler wires find the weft thread, which, if properly thrown through the remainder
of the forward movement of the lay overcomes the force of the spring 1, or the
weight of the lever K, and holds up the feeler wires and consequently the rear end
of the lever-In the mechanism shewn the lever K acting as a dagger as well as
a feeler-lever or follower of the governing rod passes under the knock off lever D
when the feeler wires thus find and rest upon the west thread, and the loom
continues its normal operation-But when the weft thread has not been well
thrown and the feeler wires fail to find it they fall into the slot 8, and, in the
mechanism shown, the rear end of the dagger follows the governing rod still
further down in the receding movement of the latter, and its point strikes the
knock off lever to operate the belt shifting mechanism-Further description of the
adjustments and the advantages resulting therefrom is unnecessary
I claim, as the fourth part of this Invention :
1. The governing rod P, vibrating with the lay but upon a different centre,
substantially as described for the purpose specified.
2. The governing rod P vibrating with the lay but upon a different centre, and
having a double adjustment, substantially as described for the purpose specified.
3. The combination with the lay and attachments thereto consisting essentially
of a feeler shaft and feelers, a feeler-lever and a crank connection between said
feeler shaft and said feeler-lever of the governing rod P arranged to vibrate with
the lay but upon a different centre substantially as described for the purpose
specified.
4 In a weft stop motion in which a direct crank connection is used between
the feeler shaft and a vibrating dagger the combination of means for adjusting the
length of the connecting rod and mechanism for directly limiting the rocking
motion of the feeler shaft, substantially as described for the purpose specified.
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.